void ompi_mpi_thread_level(int requested, int *provided)
{
/**
* These values are monotonic; MPI_THREAD_SINGLE < MPI_THREAD_FUNNELED
* < MPI_THREAD_SERIALIZED < MPI_THREAD_MULTIPLE.
* If possible, the call will return provided = required. Failing this,
* the call will return the least supported level such that
* provided > required. Finally, if the user requirement cannot be
* satisfied, then the call will return in provided the highest
* supported level.
*/
ompi_mpi_thread_requested = requested;
if (OMPI_ENABLE_THREAD_MULTIPLE == 1) {
ompi_mpi_thread_provided = *provided = requested;
ompi_mpi_main_thread = opal_thread_get_self();
} else {
if (MPI_THREAD_MULTIPLE == requested) {
ompi_mpi_thread_provided = *provided = MPI_THREAD_SERIALIZED;
} else {
ompi_mpi_thread_provided = *provided = requested;
}
ompi_mpi_main_thread = (OPAL_ENABLE_MULTI_THREADS ? opal_thread_get_self() : NULL);
}
ompi_mpi_thread_multiple = (ompi_mpi_thread_provided ==
MPI_THREAD_MULTIPLE);
}
void *MPIR_checkpoint_debugger_waitpoint(void)
{
int t;
opal_thread_t *thr = NULL;
thr = opal_thread_get_self();
/*
* Sanity check, if the debugger is not going to attach, then do not wait
* Make sure to open the debug gate, so that threads can get out
*/
if( !MPIR_debug_with_checkpoint ) {
opal_output_verbose(1, opal_cr_output,
"crs: MPIR_checkpoint_debugger_waitpoint(): Debugger is not attaching... (%d)",
(int)thr->t_handle);
MPIR_checkpoint_debug_gate = 1;
return NULL;
}
else {
opal_output_verbose(1, opal_cr_output,
"crs: MPIR_checkpoint_debugger_waitpoint(): Waiting for the Debugger to attach... (%d)",
(int)thr->t_handle);
MPIR_checkpoint_debug_gate = 0;
}
/*
* Let special threads escape without waiting, they will wait later
*/
for(t = 0; t < opal_cr_debug_num_free_threads; ++t) {
if( opal_cr_debug_free_threads[t] != NULL &&
opal_thread_self_compare(opal_cr_debug_free_threads[t]) ) {
opal_output_verbose(1, opal_cr_output,
"crs: MPIR_checkpoint_debugger_waitpoint(): Checkpointing thread does not wait here... (%d)",
(int)thr->t_handle);
return NULL;
}
}
/*
* Force all other threads into the waiting function,
* unless they are already in there, then just return so we do not nest
* calls into this wait function and potentially confuse the debugger.
*/
if( opal_cr_debug_threads_already_waiting ) {
opal_output_verbose(1, opal_cr_output,
"crs: MPIR_checkpoint_debugger_waitpoint(): Threads are already waiting from debugger detach, do not wait here... (%d)",
(int)thr->t_handle);
return NULL;
} else {
opal_output_verbose(1, opal_cr_output,
"crs: MPIR_checkpoint_debugger_waitpoint(): Wait... (%d)",
(int)thr->t_handle);
return MPIR_checkpoint_debugger_breakpoint();
}
}
int opal_cr_debug_set_current_ckpt_thread_self(void)
{
int t;
if( NULL == opal_cr_debug_free_threads ) {
opal_cr_debug_num_free_threads = 3;
opal_cr_debug_free_threads = (opal_thread_t **)malloc(sizeof(opal_thread_t *) * opal_cr_debug_num_free_threads );
for(t = 0; t < opal_cr_debug_num_free_threads; ++t ) {
opal_cr_debug_free_threads[t] = NULL;
}
}
opal_cr_debug_free_threads[0] = opal_thread_get_self();
return OPAL_SUCCESS;
}
int ompi_mpi_init(int argc, char **argv, int requested, int *provided)
{
int ret;
ompi_proc_t** procs;
size_t nprocs;
char *error = NULL;
bool timing = false;
int param, value;
struct timeval ompistart, ompistop;
char *event_val = NULL;
bool orte_setup = false;
orte_grpcomm_collective_t *coll;
char *cmd=NULL, *av=NULL;
/* bitflag of the thread level support provided. To be used
* for the modex in order to work in heterogeneous environments. */
uint8_t threadlevel_bf;
/* Indicate that we have *started* MPI_INIT*. MPI_FINALIZE has
something sorta similar in a static local variable in
ompi_mpi_finalize(). */
ompi_mpi_init_started = true;
/* Setup enough to check get/set MCA params */
if (OPAL_SUCCESS != (ret = opal_init_util(&argc, &argv))) {
error = "ompi_mpi_init: opal_init_util failed";
goto error;
}
if (OPAL_SUCCESS != (ret = opal_arch_set_fortran_logical_size(sizeof(ompi_fortran_logical_t)))) {
error = "ompi_mpi_init: opal_arch_set_fortran_logical_size failed";
goto error;
}
/* _After_ opal_init_util() but _before_ orte_init(), we need to
set an MCA param that tells libevent that it's ok to use any
mechanism in libevent that is available on this platform (e.g.,
epoll and friends). Per opal/event/event.s, we default to
select/poll -- but we know that MPI processes won't be using
pty's with the event engine, so it's ok to relax this
constraint and let any fd-monitoring mechanism be used. */
ret = mca_base_param_reg_string_name("opal", "event_include",
"Internal orted MCA param: tell opal_init() to use a specific mechanism in libevent",
false, false, "all", &event_val);
if (ret >= 0) {
/* We have to explicitly "set" the MCA param value here
because libevent initialization will re-register the MCA
param and therefore override the default. Setting the value
here puts the desired value ("all") in different storage
that is not overwritten if/when the MCA param is
re-registered. This is unless the user has specified a different
value for this MCA parameter. Make sure we check to see if the
default is specified before forcing "all" in case that is not what
the user desires. Note that we do *NOT* set this value as an
environment variable, just so that it won't be inherited by
any spawned processes and potentially cause unintented
side-effects with launching ORTE tools... */
if (0 == strcmp("all", event_val)) {
mca_base_param_set_string(ret, "all");
}
}
if( NULL != event_val ) {
free(event_val);
event_val = NULL;
}
/* check to see if we want timing information */
param = mca_base_param_reg_int_name("ompi", "timing",
"Request that critical timing loops be measured",
false, false, 0, &value);
if (value != 0) {
timing = true;
gettimeofday(&ompistart, NULL);
}
/* if we were not externally started, then we need to setup
* some envars so the MPI_INFO_ENV can get the cmd name
* and argv (but only if the user supplied a non-NULL argv!), and
* the requested thread level
*/
if (NULL == getenv("OMPI_COMMAND") && NULL != argv && NULL != argv[0]) {
asprintf(&cmd, "OMPI_COMMAND=%s", argv[0]);
putenv(cmd);
}
if (NULL == getenv("OMPI_ARGV") && 1 < argc) {
char *tmp;
tmp = opal_argv_join(&argv[1], ' ');
asprintf(&av, "OMPI_ARGV=%s", tmp);
free(tmp);
putenv(av);
}
/* Setup ORTE - note that we are an MPI process */
if (ORTE_SUCCESS != (ret = orte_init(NULL, NULL, ORTE_PROC_MPI))) {
error = "ompi_mpi_init: orte_init failed";
goto error;
}
orte_setup = true;
/* check for timing request - get stop time and report elapsed time if so */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init [%ld]: time from start to completion of orte_init %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
#if OPAL_HAVE_HWLOC
/* if hwloc is available but didn't get setup for some
* reason, do so now
*/
if (NULL == opal_hwloc_topology) {
if (OPAL_SUCCESS != (ret = opal_hwloc_base_get_topology())) {
error = "Topology init";
goto error;
}
}
#endif
/* Register errhandler callback with orte errmgr */
if (NULL != orte_errmgr.set_fault_callback) {
orte_errmgr.set_fault_callback(ompi_errhandler_runtime_callback);
}
/* Figure out the final MPI thread levels. If we were not
compiled for support for MPI threads, then don't allow
MPI_THREAD_MULTIPLE. Set this stuff up here early in the
process so that other components can make decisions based on
this value. */
/**
* These values are monotonic; MPI_THREAD_SINGLE < MPI_THREAD_FUNNELED
* < MPI_THREAD_SERIALIZED < MPI_THREAD_MULTIPLE.
* If possible, the call will return provided = required. Failing this,
* the call will return the least supported level such that
* provided > required. Finally, if the user requirement cannot be
* satisfied, then the call will return in provided the highest
* supported level.
*/
ompi_mpi_thread_requested = requested;
if (OMPI_ENABLE_THREAD_MULTIPLE == 1) {
ompi_mpi_thread_provided = *provided = requested;
ompi_mpi_main_thread = opal_thread_get_self();
} else {
if (MPI_THREAD_MULTIPLE == requested) {
ompi_mpi_thread_provided = *provided = MPI_THREAD_SERIALIZED;
} else {
ompi_mpi_thread_provided = *provided = requested;
}
ompi_mpi_main_thread = (OPAL_ENABLE_MULTI_THREADS ? opal_thread_get_self() : NULL);
}
ompi_mpi_thread_multiple = (ompi_mpi_thread_provided ==
MPI_THREAD_MULTIPLE);
/* determine the bitflag belonging to the threadlevel_support provided */
memset ( &threadlevel_bf, 0, sizeof(uint8_t));
OMPI_THREADLEVEL_SET_BITFLAG ( ompi_mpi_thread_provided, threadlevel_bf );
/* add this bitflag to the modex */
if ( OMPI_SUCCESS != (ret = ompi_modex_send_string("MPI_THREAD_LEVEL", &threadlevel_bf, sizeof(uint8_t)))) {
error = "ompi_mpi_init: modex send thread level";
goto error;
}
/* Once we've joined the RTE, see if any MCA parameters were
passed to the MPI level */
if (OMPI_SUCCESS != (ret = ompi_mpi_register_params())) {
error = "mca_mpi_register_params() failed";
goto error;
}
/* initialize datatypes. This step should be done early as it will
* create the local convertor and local arch used in the proc
* init.
*/
if (OMPI_SUCCESS != (ret = ompi_datatype_init())) {
error = "ompi_datatype_init() failed";
goto error;
}
/* Initialize OMPI procs */
if (OMPI_SUCCESS != (ret = ompi_proc_init())) {
error = "mca_proc_init() failed";
goto error;
}
/* Initialize the op framework. This has to be done *after*
ddt_init, but befor mca_coll_base_open, since some collective
modules (e.g., the hierarchical coll component) may need ops in
their query function. */
if (OMPI_SUCCESS != (ret = ompi_op_base_open())) {
error = "ompi_op_base_open() failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = ompi_op_base_find_available(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_THREAD_MULTIPLE))) {
error = "ompi_op_base_find_available() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_op_init())) {
error = "ompi_op_init() failed";
goto error;
}
/* Open up MPI-related MCA components */
if (OMPI_SUCCESS != (ret = mca_allocator_base_open())) {
error = "mca_allocator_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_rcache_base_open())) {
error = "mca_rcache_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_mpool_base_open())) {
error = "mca_mpool_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_pml_base_open())) {
error = "mca_pml_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_coll_base_open())) {
error = "mca_coll_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_osc_base_open())) {
error = "ompi_osc_base_open() failed";
goto error;
}
#if OPAL_ENABLE_FT_CR == 1
if (OMPI_SUCCESS != (ret = ompi_crcp_base_open())) {
error = "ompi_crcp_base_open() failed";
goto error;
}
#endif
/* In order to reduce the common case for MPI apps (where they
don't use MPI-2 IO or MPI-1 topology functions), the io and
topo frameworks are initialized lazily, at the first use of
relevant functions (e.g., MPI_FILE_*, MPI_CART_*, MPI_GRAPH_*),
so they are not opened here. */
/* Select which MPI components to use */
if (OMPI_SUCCESS !=
(ret = mca_mpool_base_init(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_THREAD_MULTIPLE))) {
error = "mca_mpool_base_init() failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = mca_pml_base_select(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_THREAD_MULTIPLE))) {
error = "mca_pml_base_select() failed";
goto error;
}
/* check for timing request - get stop time and report elapsed time if so */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time from completion of orte_init to modex %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
/* exchange connection info - this function also acts as a barrier
* as it will not return until the exchange is complete
*/
coll = OBJ_NEW(orte_grpcomm_collective_t);
coll->id = orte_process_info.peer_modex;
if (ORTE_SUCCESS != (ret = orte_grpcomm.modex(coll))) {
error = "orte_grpcomm_modex failed";
goto error;
}
/* wait for modex to complete - this may be moved anywhere in mpi_init
* so long as it occurs prior to calling a function that needs
* the modex info!
*/
while (coll->active) {
opal_progress(); /* block in progress pending events */
}
OBJ_RELEASE(coll);
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time to execute modex %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
/* select buffered send allocator component to be used */
ret=mca_pml_base_bsend_init(OMPI_ENABLE_THREAD_MULTIPLE);
if( OMPI_SUCCESS != ret ) {
error = "mca_pml_base_bsend_init() failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = mca_coll_base_find_available(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_THREAD_MULTIPLE))) {
error = "mca_coll_base_find_available() failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = ompi_osc_base_find_available(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_THREAD_MULTIPLE))) {
error = "ompi_osc_base_find_available() failed";
goto error;
}
#if OPAL_ENABLE_FT_CR == 1
if (OMPI_SUCCESS != (ret = ompi_crcp_base_select() ) ) {
error = "ompi_crcp_base_select() failed";
goto error;
}
#endif
/* io and topo components are not selected here -- see comment
above about the io and topo frameworks being loaded lazily */
/* Initialize each MPI handle subsystem */
/* initialize requests */
if (OMPI_SUCCESS != (ret = ompi_request_init())) {
error = "ompi_request_init() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_message_init())) {
error = "ompi_message_init() failed";
goto error;
}
/* initialize info */
if (OMPI_SUCCESS != (ret = ompi_info_init())) {
error = "ompi_info_init() failed";
goto error;
}
/* initialize error handlers */
if (OMPI_SUCCESS != (ret = ompi_errhandler_init())) {
error = "ompi_errhandler_init() failed";
goto error;
}
/* initialize error codes */
if (OMPI_SUCCESS != (ret = ompi_mpi_errcode_init())) {
error = "ompi_mpi_errcode_init() failed";
goto error;
}
/* initialize internal error codes */
if (OMPI_SUCCESS != (ret = ompi_errcode_intern_init())) {
error = "ompi_errcode_intern_init() failed";
goto error;
}
/* initialize groups */
if (OMPI_SUCCESS != (ret = ompi_group_init())) {
error = "ompi_group_init() failed";
goto error;
}
/* initialize communicators */
if (OMPI_SUCCESS != (ret = ompi_comm_init())) {
error = "ompi_comm_init() failed";
goto error;
}
/* initialize file handles */
if (OMPI_SUCCESS != (ret = ompi_file_init())) {
error = "ompi_file_init() failed";
goto error;
}
/* initialize windows */
if (OMPI_SUCCESS != (ret = ompi_win_init())) {
error = "ompi_win_init() failed";
goto error;
}
/* initialize attribute meta-data structure for comm/win/dtype */
if (OMPI_SUCCESS != (ret = ompi_attr_init())) {
error = "ompi_attr_init() failed";
goto error;
}
/* identify the architectures of remote procs and setup
* their datatype convertors, if required
*/
if (OMPI_SUCCESS != (ret = ompi_proc_complete_init())) {
error = "ompi_proc_complete_init failed";
goto error;
}
/* If thread support was enabled, then setup OPAL to allow for
them. */
if ((OMPI_ENABLE_PROGRESS_THREADS == 1) ||
(*provided != MPI_THREAD_SINGLE)) {
opal_set_using_threads(true);
}
/* start PML/BTL's */
ret = MCA_PML_CALL(enable(true));
if( OMPI_SUCCESS != ret ) {
error = "PML control failed";
goto error;
}
/* add all ompi_proc_t's to PML */
if (NULL == (procs = ompi_proc_world(&nprocs))) {
error = "ompi_proc_world() failed";
goto error;
}
ret = MCA_PML_CALL(add_procs(procs, nprocs));
free(procs);
/* If we got "unreachable", then print a specific error message.
Otherwise, if we got some other failure, fall through to print
a generic message. */
if (OMPI_ERR_UNREACH == ret) {
orte_show_help("help-mpi-runtime",
"mpi_init:startup:pml-add-procs-fail", true);
error = NULL;
goto error;
} else if (OMPI_SUCCESS != ret) {
error = "PML add procs failed";
goto error;
}
MCA_PML_CALL(add_comm(&ompi_mpi_comm_world.comm));
MCA_PML_CALL(add_comm(&ompi_mpi_comm_self.comm));
/*
* Dump all MCA parameters if requested
*/
if (ompi_mpi_show_mca_params) {
ompi_show_all_mca_params(ompi_mpi_comm_world.comm.c_my_rank,
nprocs,
orte_process_info.nodename);
}
/* Do we need to wait for a debugger? */
ompi_wait_for_debugger();
/* check for timing request - get stop time and report elapsed
time if so, then start the clock again */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time from modex to first barrier %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
/* wait for everyone to reach this point */
coll = OBJ_NEW(orte_grpcomm_collective_t);
coll->id = orte_process_info.peer_init_barrier;
if (ORTE_SUCCESS != (ret = orte_grpcomm.barrier(coll))) {
error = "orte_grpcomm_barrier failed";
goto error;
}
/* wait for barrier to complete */
while (coll->active) {
opal_progress(); /* block in progress pending events */
}
OBJ_RELEASE(coll);
/* check for timing request - get stop time and report elapsed
time if so, then start the clock again */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time to execute barrier %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
#if OMPI_ENABLE_PROGRESS_THREADS == 0
/* Start setting up the event engine for MPI operations. Don't
block in the event library, so that communications don't take
forever between procs in the dynamic code. This will increase
CPU utilization for the remainder of MPI_INIT when we are
blocking on ORTE-level events, but may greatly reduce non-TCP
latency. */
opal_progress_set_event_flag(OPAL_EVLOOP_NONBLOCK);
#endif
/* wire up the mpi interface, if requested. Do this after the
non-block switch for non-TCP performance. Do before the
polling change as anyone with a complex wire-up is going to be
using the oob. */
if (OMPI_SUCCESS != (ret = ompi_init_preconnect_mpi())) {
error = "ompi_mpi_do_preconnect_all() failed";
goto error;
}
/* Setup the publish/subscribe (PUBSUB) framework */
if (OMPI_SUCCESS != (ret = ompi_pubsub_base_open())) {
error = "ompi_pubsub_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_pubsub_base_select())) {
error = "ompi_pubsub_base_select() failed";
goto error;
}
/* Setup the dynamic process management (DPM) framework */
if (OMPI_SUCCESS != (ret = ompi_dpm_base_open())) {
error = "ompi_dpm_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_dpm_base_select())) {
error = "ompi_dpm_base_select() failed";
goto error;
}
/* Determine the overall threadlevel support of all processes
in MPI_COMM_WORLD. This has to be done before calling
coll_base_comm_select, since some of the collective components
e.g. hierarch, might create subcommunicators. The threadlevel
requested by all processes is required in order to know
which cid allocation algorithm can be used. */
if ( OMPI_SUCCESS !=
( ret = ompi_comm_cid_init ())) {
error = "ompi_mpi_init: ompi_comm_cid_init failed";
goto error;
}
/* Init coll for the comms. This has to be after dpm_base_select,
(since dpm.mark_dyncomm is not set in the communicator creation
function else), but before dpm.dyncom_init, since this function
might require collective for the CID allocation. */
if (OMPI_SUCCESS !=
(ret = mca_coll_base_comm_select(MPI_COMM_WORLD))) {
error = "mca_coll_base_comm_select(MPI_COMM_WORLD) failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = mca_coll_base_comm_select(MPI_COMM_SELF))) {
error = "mca_coll_base_comm_select(MPI_COMM_SELF) failed";
goto error;
}
/* Check whether we have been spawned or not. We introduce that
at the very end, since we need collectives, datatypes, ptls
etc. up and running here.... */
if (OMPI_SUCCESS != (ret = ompi_dpm.dyn_init())) {
error = "ompi_comm_dyn_init() failed";
goto error;
}
/*
* Startup the Checkpoint/Restart Mech.
* Note: Always do this so tools don't hang when
* in a non-checkpointable build
*/
if (OMPI_SUCCESS != (ret = ompi_cr_init())) {
error = "ompi_cr_init";
goto error;
}
/* Undo OPAL calling opal_progress_event_users_increment() during
opal_init, to get better latency when not using TCP. Do
this *after* dyn_init, as dyn init uses lots of ORTE
communication and we don't want to hinder the performance of
that code. */
opal_progress_event_users_decrement();
/* see if yield_when_idle was specified - if so, use it */
param = mca_base_param_find("mpi", NULL, "yield_when_idle");
mca_base_param_lookup_int(param, &value);
if (value < 0) {
/* if no info is provided, just default to conservative */
opal_progress_set_yield_when_idle(true);
} else {
/* info was provided, so set idle accordingly */
opal_progress_set_yield_when_idle(value == 0 ? false : true);
}
param = mca_base_param_find("mpi", NULL, "event_tick_rate");
mca_base_param_lookup_int(param, &value);
/* negative value means use default - just don't do anything */
if (value >= 0) {
opal_progress_set_event_poll_rate(value);
}
/* At this point, we are fully configured and in MPI mode. Any
communication calls here will work exactly like they would in
the user's code. Setup the connections between procs and warm
them up with simple sends, if requested */
if (OMPI_SUCCESS != (ret = ompi_mpiext_init())) {
error = "ompi_mpiext_init";
goto error;
}
/* Fall through */
error:
if (ret != OMPI_SUCCESS) {
/* Only print a message if one was not already printed */
if (NULL != error) {
const char *err_msg = opal_strerror(ret);
/* If ORTE was not setup yet, don't use orte_show_help */
if (orte_setup) {
orte_show_help("help-mpi-runtime",
"mpi_init:startup:internal-failure", true,
"MPI_INIT", "MPI_INIT", error, err_msg, ret);
} else {
opal_show_help("help-mpi-runtime",
"mpi_init:startup:internal-failure", true,
"MPI_INIT", "MPI_INIT", error, err_msg, ret);
}
}
return ret;
}
/* Initialize the registered datarep list to be empty */
OBJ_CONSTRUCT(&ompi_registered_datareps, opal_list_t);
/* Initialize the arrays used to store the F90 types returned by the
* MPI_Type_create_f90_XXX functions.
*/
OBJ_CONSTRUCT( &ompi_mpi_f90_integer_hashtable, opal_hash_table_t);
opal_hash_table_init(&ompi_mpi_f90_integer_hashtable, 16 /* why not? */);
OBJ_CONSTRUCT( &ompi_mpi_f90_real_hashtable, opal_hash_table_t);
opal_hash_table_init(&ompi_mpi_f90_real_hashtable, FLT_MAX_10_EXP);
OBJ_CONSTRUCT( &ompi_mpi_f90_complex_hashtable, opal_hash_table_t);
opal_hash_table_init(&ompi_mpi_f90_complex_hashtable, FLT_MAX_10_EXP);
/* All done. Wasn't that simple? */
ompi_mpi_initialized = true;
/* check for timing request - get stop time and report elapsed time if so */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time from barrier to complete mpi_init %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
}
return MPI_SUCCESS;
}
int ompi_mpi_init(int argc, char **argv, int requested, int *provided)
{
int ret;
ompi_proc_t** procs;
size_t nprocs;
char *error = NULL;
bool timing = false;
int param, value;
struct timeval ompistart, ompistop;
char *event_val = NULL;
opal_paffinity_base_cpu_set_t mask;
bool proc_bound;
#if 0
/* see comment below about sched_yield */
int num_processors;
#endif
bool orte_setup = false;
bool paffinity_enabled = false;
/* Setup enough to check get/set MCA params */
if (ORTE_SUCCESS != (ret = opal_init_util())) {
error = "ompi_mpi_init: opal_init_util failed";
goto error;
}
/* _After_ opal_init_util() but _before_ orte_init(), we need to
set an MCA param that tells libevent that it's ok to use any
mechanism in libevent that is available on this platform (e.g.,
epoll and friends). Per opal/event/event.s, we default to
select/poll -- but we know that MPI processes won't be using
pty's with the event engine, so it's ok to relax this
constraint and let any fd-monitoring mechanism be used. */
ret = mca_base_param_reg_string_name("opal", "event_include",
"Internal orted MCA param: tell opal_init() to use a specific mechanism in libevent",
false, false, "all", &event_val);
if (ret >= 0) {
/* We have to explicitly "set" the MCA param value here
because libevent initialization will re-register the MCA
param and therefore override the default. Setting the value
here puts the desired value ("all") in different storage
that is not overwritten if/when the MCA param is
re-registered. This is unless the user has specified a different
value for this MCA parameter. Make sure we check to see if the
default is specified before forcing "all" in case that is not what
the user desires. Note that we do *NOT* set this value as an
environment variable, just so that it won't be inherited by
any spawned processes and potentially cause unintented
side-effects with launching ORTE tools... */
if (0 == strcmp("all", event_val)) {
mca_base_param_set_string(ret, "all");
}
}
if( NULL != event_val ) {
free(event_val);
event_val = NULL;
}
/* check to see if we want timing information */
param = mca_base_param_reg_int_name("ompi", "timing",
"Request that critical timing loops be measured",
false, false, 0, &value);
if (value != 0) {
timing = true;
gettimeofday(&ompistart, NULL);
}
/* Setup ORTE - note that we are not a tool */
if (ORTE_SUCCESS != (ret = orte_init(ORTE_NON_TOOL))) {
error = "ompi_mpi_init: orte_init failed";
goto error;
}
orte_setup = true;
/* check for timing request - get stop time and report elapsed time if so */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init [%ld]: time from start to completion of orte_init %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
/* Figure out the final MPI thread levels. If we were not
compiled for support for MPI threads, then don't allow
MPI_THREAD_MULTIPLE. Set this stuff up here early in the
process so that other components can make decisions based on
this value. */
ompi_mpi_thread_requested = requested;
if (OMPI_HAVE_THREAD_SUPPORT == 0) {
ompi_mpi_thread_provided = *provided = MPI_THREAD_SINGLE;
ompi_mpi_main_thread = NULL;
} else if (OMPI_ENABLE_MPI_THREADS == 1) {
ompi_mpi_thread_provided = *provided = requested;
ompi_mpi_main_thread = opal_thread_get_self();
} else {
if (MPI_THREAD_MULTIPLE == requested) {
ompi_mpi_thread_provided = *provided = MPI_THREAD_SERIALIZED;
} else {
ompi_mpi_thread_provided = *provided = requested;
}
ompi_mpi_main_thread = opal_thread_get_self();
}
ompi_mpi_thread_multiple = (ompi_mpi_thread_provided ==
MPI_THREAD_MULTIPLE);
/* Once we've joined the RTE, see if any MCA parameters were
passed to the MPI level */
if (OMPI_SUCCESS != (ret = ompi_mpi_register_params())) {
error = "mca_mpi_register_params() failed";
goto error;
}
/* if it hasn't already been done, setup process affinity.
* First check to see if a slot list was
* specified. If so, use it. If no slot list was specified,
* that's not an error -- just fall through and try the next
* paffinity scheme.
*/
ret = opal_paffinity_base_get(&mask);
if (OPAL_SUCCESS == ret) {
/* paffinity is supported - check for binding */
OPAL_PAFFINITY_PROCESS_IS_BOUND(mask, &proc_bound);
if (proc_bound) {
/* someone external set it - indicate it is set
* so that we know
*/
paffinity_enabled = true;
} else {
/* the system is capable of doing processor affinity, but it
* has not yet been set - see if a slot_list was given
*/
if (NULL != opal_paffinity_base_slot_list) {
/* It's an error if multiple paffinity schemes were specified */
if (opal_paffinity_alone) {
ret = OMPI_ERR_BAD_PARAM;
error = "Multiple processor affinity schemes specified (can only specify one)";
goto error;
}
ret = opal_paffinity_base_slot_list_set((long)ORTE_PROC_MY_NAME->vpid, opal_paffinity_base_slot_list);
if (OPAL_ERR_NOT_FOUND != ret) {
error = "opal_paffinity_base_slot_list_set() returned an error";
goto error;
}
paffinity_enabled = true;
} else if (opal_paffinity_alone) {
/* no slot_list, but they asked for paffinity */
int phys_cpu;
orte_node_rank_t nrank;
if (ORTE_NODE_RANK_INVALID == (nrank = orte_ess.get_node_rank(ORTE_PROC_MY_NAME))) {
error = "Could not get node rank - cannot set processor affinity";
goto error;
}
OPAL_PAFFINITY_CPU_ZERO(mask);
phys_cpu = opal_paffinity_base_get_physical_processor_id(nrank);
if (0 > phys_cpu) {
error = "Could not get physical processor id - cannot set processor affinity";
goto error;
}
OPAL_PAFFINITY_CPU_SET(phys_cpu, mask);
ret = opal_paffinity_base_set(mask);
if (OPAL_SUCCESS != ret) {
error = "Setting processor affinity failed";
goto error;
}
paffinity_enabled = true;
}
}
}
/* If we were able to set processor affinity, try setting up
memory affinity */
if (!opal_maffinity_setup && paffinity_enabled) {
if (OPAL_SUCCESS == opal_maffinity_base_open() &&
OPAL_SUCCESS == opal_maffinity_base_select()) {
opal_maffinity_setup = true;
}
}
/* initialize datatypes. This step should be done early as it will
* create the local convertor and local arch used in the proc
* init.
*/
if (OMPI_SUCCESS != (ret = ompi_ddt_init())) {
error = "ompi_ddt_init() failed";
goto error;
}
/* Initialize OMPI procs */
if (OMPI_SUCCESS != (ret = ompi_proc_init())) {
error = "mca_proc_init() failed";
goto error;
}
/* initialize ops. This has to be done *after* ddt_init, but
befor mca_coll_base_open, since come collective modules
(e.g. the hierarchical) need them in the query function
*/
if (OMPI_SUCCESS != (ret = ompi_op_init())) {
error = "ompi_op_init() failed";
goto error;
}
/* Open up MPI-related MCA components */
if (OMPI_SUCCESS != (ret = mca_allocator_base_open())) {
error = "mca_allocator_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_rcache_base_open())) {
error = "mca_rcache_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_mpool_base_open())) {
error = "mca_mpool_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_pml_base_open())) {
error = "mca_pml_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = mca_coll_base_open())) {
error = "mca_coll_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_osc_base_open())) {
error = "ompi_osc_base_open() failed";
goto error;
}
#if OPAL_ENABLE_FT == 1
if (OMPI_SUCCESS != (ret = ompi_crcp_base_open())) {
error = "ompi_crcp_base_open() failed";
goto error;
}
#endif
/* In order to reduce the common case for MPI apps (where they
don't use MPI-2 IO or MPI-1 topology functions), the io and
topo frameworks are initialized lazily, at the first use of
relevant functions (e.g., MPI_FILE_*, MPI_CART_*, MPI_GRAPH_*),
so they are not opened here. */
/* Select which MPI components to use */
if (OMPI_SUCCESS !=
(ret = mca_mpool_base_init(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_MPI_THREADS))) {
error = "mca_mpool_base_init() failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = mca_pml_base_select(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_MPI_THREADS))) {
error = "mca_pml_base_select() failed";
goto error;
}
/* select buffered send allocator component to be used */
ret=mca_pml_base_bsend_init(OMPI_ENABLE_MPI_THREADS);
if( OMPI_SUCCESS != ret ) {
error = "mca_pml_base_bsend_init() failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = mca_coll_base_find_available(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_MPI_THREADS))) {
error = "mca_coll_base_find_available() failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = ompi_osc_base_find_available(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_MPI_THREADS))) {
error = "ompi_osc_base_find_available() failed";
goto error;
}
#if OPAL_ENABLE_FT == 1
if (OMPI_SUCCESS != (ret = ompi_crcp_base_select() ) ) {
error = "ompi_crcp_base_select() failed";
goto error;
}
#endif
/* io and topo components are not selected here -- see comment
above about the io and topo frameworks being loaded lazily */
/* Initialize each MPI handle subsystem */
/* initialize requests */
if (OMPI_SUCCESS != (ret = ompi_request_init())) {
error = "ompi_request_init() failed";
goto error;
}
/* initialize info */
if (OMPI_SUCCESS != (ret = ompi_info_init())) {
error = "ompi_info_init() failed";
goto error;
}
/* initialize error handlers */
if (OMPI_SUCCESS != (ret = ompi_errhandler_init())) {
error = "ompi_errhandler_init() failed";
goto error;
}
/* initialize error codes */
if (OMPI_SUCCESS != (ret = ompi_mpi_errcode_init())) {
error = "ompi_mpi_errcode_init() failed";
goto error;
}
/* initialize internal error codes */
if (OMPI_SUCCESS != (ret = ompi_errcode_intern_init())) {
error = "ompi_errcode_intern_init() failed";
goto error;
}
/* initialize groups */
if (OMPI_SUCCESS != (ret = ompi_group_init())) {
error = "ompi_group_init() failed";
goto error;
}
/* initialize communicators */
if (OMPI_SUCCESS != (ret = ompi_comm_init())) {
error = "ompi_comm_init() failed";
goto error;
}
/* initialize file handles */
if (OMPI_SUCCESS != (ret = ompi_file_init())) {
error = "ompi_file_init() failed";
goto error;
}
/* initialize windows */
if (OMPI_SUCCESS != (ret = ompi_win_init())) {
error = "ompi_win_init() failed";
goto error;
}
/* initialize attribute meta-data structure for comm/win/dtype */
if (OMPI_SUCCESS != (ret = ompi_attr_init())) {
error = "ompi_attr_init() failed";
goto error;
}
/* check for timing request - get stop time and report elapsed time if so */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time from completion of orte_init to modex %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
/* exchange connection info - this function also acts as a barrier
* as it will not return until the exchange is complete
*/
if (OMPI_SUCCESS != (ret = orte_grpcomm.modex(NULL))) {
error = "orte_grpcomm_modex failed";
goto error;
}
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time to execute modex %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
/* identify the architectures of remote procs and setup
* their datatype convertors, if required
*/
if (OMPI_SUCCESS != (ret = ompi_proc_set_arch())) {
error = "ompi_proc_set_arch failed";
goto error;
}
/* If thread support was enabled, then setup OPAL to allow for
them. */
if ((OMPI_ENABLE_PROGRESS_THREADS == 1) ||
(*provided != MPI_THREAD_SINGLE)) {
opal_set_using_threads(true);
}
/* start PML/BTL's */
ret = MCA_PML_CALL(enable(true));
if( OMPI_SUCCESS != ret ) {
error = "PML control failed";
goto error;
}
/* add all ompi_proc_t's to PML */
if (NULL == (procs = ompi_proc_world(&nprocs))) {
error = "ompi_proc_world() failed";
goto error;
}
ret = MCA_PML_CALL(add_procs(procs, nprocs));
free(procs);
if( OMPI_SUCCESS != ret ) {
error = "PML add procs failed";
goto error;
}
MCA_PML_CALL(add_comm(&ompi_mpi_comm_world.comm));
MCA_PML_CALL(add_comm(&ompi_mpi_comm_self.comm));
/*
* Dump all MCA parameters if requested
*/
if (ompi_mpi_show_mca_params) {
ompi_show_all_mca_params(ompi_mpi_comm_world.comm.c_my_rank,
nprocs,
orte_process_info.nodename);
}
/* Do we need to wait for a debugger? */
ompi_wait_for_debugger();
/* check for timing request - get stop time and report elapsed
time if so, then start the clock again */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time from modex thru complete oob wireup %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
/* wait for everyone to reach this point */
if (OMPI_SUCCESS != (ret = orte_grpcomm.barrier())) {
error = "orte_grpcomm_barrier failed";
goto error;
}
/* check for timing request - get stop time and report elapsed
time if so, then start the clock again */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time to execute barrier %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
gettimeofday(&ompistart, NULL);
}
#if OMPI_ENABLE_PROGRESS_THREADS == 0
/* Start setting up the event engine for MPI operations. Don't
block in the event library, so that communications don't take
forever between procs in the dynamic code. This will increase
CPU utilization for the remainder of MPI_INIT when we are
blocking on ORTE-level events, but may greatly reduce non-TCP
latency. */
opal_progress_set_event_flag(OPAL_EVLOOP_NONBLOCK);
#endif
/* wire up the mpi interface, if requested. Do this after the
non-block switch for non-TCP performance. Do before the
polling change as anyone with a complex wire-up is going to be
using the oob. */
if (OMPI_SUCCESS != (ret = ompi_init_preconnect_mpi())) {
error = "ompi_mpi_do_preconnect_all() failed";
goto error;
}
/* Setup the publish/subscribe (PUBSUB) framework */
if (OMPI_SUCCESS != (ret = ompi_pubsub_base_open())) {
error = "ompi_pubsub_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_pubsub_base_select())) {
error = "ompi_pubsub_base_select() failed";
goto error;
}
/* Setup the dynamic process management (DPM) framework */
if (OMPI_SUCCESS != (ret = ompi_dpm_base_open())) {
error = "ompi_dpm_base_open() failed";
goto error;
}
if (OMPI_SUCCESS != (ret = ompi_dpm_base_select())) {
error = "ompi_dpm_base_select() failed";
goto error;
}
/* Init coll for the comms. This has to be after dpm_base_select,
(since dpm.mark_dyncomm is not set in the communicator creation
function else), but before dpm.dyncom_init, since this function
might require collective for the CID allocation. */
if (OMPI_SUCCESS !=
(ret = mca_coll_base_comm_select(MPI_COMM_WORLD))) {
error = "mca_coll_base_comm_select(MPI_COMM_WORLD) failed";
goto error;
}
if (OMPI_SUCCESS !=
(ret = mca_coll_base_comm_select(MPI_COMM_SELF))) {
error = "mca_coll_base_comm_select(MPI_COMM_SELF) failed";
goto error;
}
/* Check whether we have been spawned or not. We introduce that
at the very end, since we need collectives, datatypes, ptls
etc. up and running here.... */
if (OMPI_SUCCESS != (ret = ompi_dpm.dyn_init())) {
error = "ompi_comm_dyn_init() failed";
goto error;
}
/*
* Startup the Checkpoint/Restart Mech.
* Note: Always do this so tools don't hang when
* in a non-checkpointable build
*/
if (OMPI_SUCCESS != (ret = ompi_cr_init())) {
error = "ompi_cr_init";
goto error;
}
/* Undo OPAL calling opal_progress_event_users_increment() during
opal_init, to get better latency when not using TCP. Do
this *after* dyn_init, as dyn init uses lots of ORTE
communication and we don't want to hinder the performance of
that code. */
opal_progress_event_users_decrement();
/* see if yield_when_idle was specified - if so, use it */
param = mca_base_param_find("mpi", NULL, "yield_when_idle");
mca_base_param_lookup_int(param, &value);
if (value < 0) {
/* if no info is provided, just default to conservative */
opal_progress_set_yield_when_idle(true);
} else {
/* info was provided, so set idle accordingly */
opal_progress_set_yield_when_idle(value == 0 ? false : true);
}
param = mca_base_param_find("mpi", NULL, "event_tick_rate");
mca_base_param_lookup_int(param, &value);
/* negative value means use default - just don't do anything */
if (value >= 0) {
opal_progress_set_event_poll_rate(value);
}
/* At this point, we are fully configured and in MPI mode. Any
communication calls here will work exactly like they would in
the user's code. Setup the connections between procs and warm
them up with simple sends, if requested */
error:
if (ret != OMPI_SUCCESS) {
const char *err_msg = opal_strerror(ret);
/* If ORTE was not setup yet, don't use orte_show_help */
if (orte_setup) {
orte_show_help("help-mpi-runtime",
"mpi_init:startup:internal-failure", true,
"MPI_INIT", "MPI_INIT", error, err_msg, ret);
} else {
opal_show_help("help-mpi-runtime",
"mpi_init:startup:internal-failure", true,
"MPI_INIT", "MPI_INIT", error, err_msg, ret);
}
return ret;
}
/* Initialize the registered datarep list to be empty */
OBJ_CONSTRUCT(&ompi_registered_datareps, opal_list_t);
/* Initialize the arrays used to store the F90 types returned by the
* MPI_Type_create_f90_XXX functions.
*/
OBJ_CONSTRUCT( &ompi_mpi_f90_integer_hashtable, opal_hash_table_t);
opal_hash_table_init(&ompi_mpi_f90_integer_hashtable, 16 /* why not? */);
OBJ_CONSTRUCT( &ompi_mpi_f90_real_hashtable, opal_hash_table_t);
opal_hash_table_init(&ompi_mpi_f90_real_hashtable, FLT_MAX_10_EXP);
OBJ_CONSTRUCT( &ompi_mpi_f90_complex_hashtable, opal_hash_table_t);
opal_hash_table_init(&ompi_mpi_f90_complex_hashtable, FLT_MAX_10_EXP);
/* All done. Wasn't that simple? */
ompi_mpi_initialized = true;
/* check for timing request - get stop time and report elapsed time if so */
if (timing && 0 == ORTE_PROC_MY_NAME->vpid) {
gettimeofday(&ompistop, NULL);
opal_output(0, "ompi_mpi_init[%ld]: time from barrier p to complete mpi_init %ld usec",
(long)ORTE_PROC_MY_NAME->vpid,
(long int)((ompistop.tv_sec - ompistart.tv_sec)*1000000 +
(ompistop.tv_usec - ompistart.tv_usec)));
}
return MPI_SUCCESS;
}
static void* opal_cr_thread_fn(opal_object_t *obj)
{
/* Sanity Check */
if( !opal_cr_thread_use_if_avail ) {
return NULL;
}
if( opal_cr_debug_sigpipe ) {
if( SIG_ERR == signal(SIGPIPE, opal_cr_sigpipe_debug_signal_handler) ) {
;
}
}
/*
* Register this thread with the OPAL CRS
*/
if( NULL != opal_crs.crs_reg_thread ) {
if( OPAL_SUCCESS != opal_crs.crs_reg_thread() ) {
opal_output(0, "Error: Thread registration failed\n");
return NULL;
}
}
#if OPAL_ENABLE_CRDEBUG == 1
opal_cr_debug_free_threads[1] = opal_thread_get_self();
#endif
/*
* Wait to become active
*/
while( !opal_cr_thread_is_active && !opal_cr_thread_is_done) {
sched_yield();
}
if( opal_cr_thread_is_done ) {
return NULL;
}
/*
* While active
*/
while( opal_cr_thread_is_active && !opal_cr_thread_is_done) {
/*
* While no threads are in the MPI library then try to process
* checkpoint requests.
*/
OPAL_CR_THREAD_LOCK();
while ( !opal_cr_thread_in_library ) {
sched_yield();
usleep(opal_cr_thread_sleep_check);
OPAL_CR_TEST_CHECKPOINT_READY();
/* Sanity check */
if( OPAL_UNLIKELY(opal_cr_currently_stalled) ) {
OPAL_CR_TEST_CHECKPOINT_READY();
}
}
/*
* While they are in the MPI library yield
*/
OPAL_CR_THREAD_UNLOCK();
while ( opal_cr_thread_in_library && opal_cr_thread_is_active ) {
usleep(opal_cr_thread_sleep_wait);
}
}
return NULL;
}
static void MPIR_checkpoint_debugger_crs_hook(cr_hook_event_t event) {
opal_thread_t *my_thread_id = NULL;
my_thread_id = opal_thread_get_self();
/* Non-MPI threads */
if(event == CR_HOOK_RSTRT_NO_CALLBACKS ) {
/* wait for the MPI thread to refresh the environment for us */
while(!blcr_crdebug_refreshed_env) {
sched_yield();
}
}
/* MPI threads */
else if(event == CR_HOOK_RSTRT_SIGNAL_CONTEXT ) {
if( opal_thread_self_compare(checkpoint_thread_id) ) {
opal_cr_refresh_environ(my_pid);
blcr_crdebug_refreshed_env = true;
} else {
while(!blcr_crdebug_refreshed_env) {
sched_yield();
}
}
}
/*
* Some debugging output
*/
/* Non-MPI threads */
if( event == CR_HOOK_CONT_NO_CALLBACKS ) {
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: MPIR_checkpoint_debugger_crs_hook: Waiting in Continue (Non-MPI). (%d)",
(int)my_thread_id->t_handle);
}
else if(event == CR_HOOK_RSTRT_NO_CALLBACKS ) {
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: MPIR_checkpoint_debugger_crs_hook: Waiting in Restart (Non-MPI). (%d)",
(int)my_thread_id->t_handle);
}
/* MPI Threads */
else if( event == CR_HOOK_CONT_SIGNAL_CONTEXT ) {
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: MPIR_checkpoint_debugger_crs_hook: Waiting in Continue (MPI).");
}
else if(event == CR_HOOK_RSTRT_SIGNAL_CONTEXT ) {
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: MPIR_checkpoint_debugger_crs_hook: Waiting in Restart (MPI).");
}
/*
* Enter the breakpoint function.
* If no debugger intends on attaching, then this function is expected to
* return immediately.
*
* If this is an MPI thread then odds are that this is the checkpointing
* thread, in which case this function will return immediately allowing
* it to prepare the MPI library before signaling to the debugger that
* it is safe to attach, if necessary.
*/
MPIR_checkpoint_debugger_waitpoint();
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: MPIR_checkpoint_debugger_crs_hook: Finished...");
}
int opal_crs_blcr_checkpoint(pid_t pid,
opal_crs_base_snapshot_t *base_snapshot,
opal_crs_base_ckpt_options_t *options,
opal_crs_state_type_t *state)
{
int ret, exit_status = OPAL_SUCCESS;
opal_crs_blcr_snapshot_t *snapshot = NULL;
#if CRS_BLCR_HAVE_CR_REQUEST_CHECKPOINT == 1
cr_checkpoint_args_t cr_args;
static cr_checkpoint_handle_t cr_handle = (cr_checkpoint_handle_t)(-1);
#endif
int fd = 0;
char *loc_fname = NULL;
if( pid != my_pid ) {
opal_output(0, "crs:blcr: checkpoint(%d, ---): Checkpointing of peers not allowed!", pid);
exit_status = OPAL_ERROR;
goto cleanup;
}
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: checkpoint(%d, ---)", pid);
snapshot = (opal_crs_blcr_snapshot_t *)base_snapshot;
/*
* Update the snapshot metadata
*/
snapshot->super.component_name = strdup(mca_crs_blcr_component.super.base_version.mca_component_name);
blcr_get_checkpoint_filename(&(snapshot->context_filename), pid);
if( NULL == snapshot->super.metadata ) {
if (NULL == (snapshot->super.metadata = fopen(snapshot->super.metadata_filename, "a")) ) {
opal_output(mca_crs_blcr_component.super.output_handle,
"crs:blcr: checkpoint(): Error: Unable to open the file (%s)",
snapshot->super.metadata_filename);
exit_status = OPAL_ERROR;
goto cleanup;
}
}
fprintf(snapshot->super.metadata, "%s%s\n", CRS_METADATA_COMP, snapshot->super.component_name);
fprintf(snapshot->super.metadata, "%s%s\n", CRS_METADATA_CONTEXT, snapshot->context_filename);
fclose(snapshot->super.metadata );
snapshot->super.metadata = NULL;
/*
* If we can checkpointing ourselves do so:
* use cr_request_checkpoint() if available, and cr_request_file() if not
*/
if( opal_crs_blcr_dev_null ) {
loc_fname = strdup("/dev/null");
} else {
asprintf(&loc_fname, "%s/%s", snapshot->super.snapshot_directory, snapshot->context_filename);
}
#if OPAL_ENABLE_CRDEBUG == 1
/* Make sure to identify the checkpointing thread, so that it is not
* prevented from requesting the checkpoint after the debugger detaches
*/
opal_cr_debug_set_current_ckpt_thread_self();
checkpoint_thread_id = opal_thread_get_self();
blcr_crdebug_refreshed_env = false;
/* If checkpoint/restart enabled debugging then mark detachment place */
if( MPIR_debug_with_checkpoint ) {
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: checkpoint(): Detaching debugger...");
MPIR_checkpoint_debugger_detach();
}
#endif
opal_output_verbose(10, mca_crs_blcr_component.super.output_handle,
"crs:blcr: checkpoint SELF <%s>",
loc_fname);
#if CRS_BLCR_HAVE_CR_REQUEST_CHECKPOINT == 1 || CRS_BLCR_HAVE_CR_REQUEST == 1
#if CRS_BLCR_HAVE_CR_REQUEST_CHECKPOINT == 1
fd = open(loc_fname,
O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE,
S_IRUSR | S_IWUSR);
if( fd < 0 ) {
*state = OPAL_CRS_ERROR;
opal_output(mca_crs_blcr_component.super.output_handle,
"crs:blcr: checkpoint(): Error: Unable to open checkpoint file (%s) for pid (%d)",
loc_fname, pid);
exit_status = OPAL_ERROR;
goto cleanup;
}
cr_initialize_checkpoint_args_t(&cr_args);
cr_args.cr_scope = CR_SCOPE_PROC;
cr_args.cr_fd = fd;
if( options->stop ) {
cr_args.cr_signal = SIGSTOP;
}
ret = cr_request_checkpoint(&cr_args, &cr_handle);
if( ret < 0 ) {
close(cr_args.cr_fd);
*state = OPAL_CRS_ERROR;
opal_output(mca_crs_blcr_component.super.output_handle,
"crs:blcr: checkpoint(): Error: Unable to checkpoint pid (%d) to file (%s)",
pid, loc_fname);
exit_status = ret;
goto cleanup;
}
/* Wait for checkpoint to finish */
do {
ret = cr_poll_checkpoint(&cr_handle, NULL);
if( ret < 0 ) {
/* Check if restarting. This is not an error. */
if( (ret == CR_POLL_CHKPT_ERR_POST) && (errno == CR_ERESTARTED) ) {
ret = 0;
break;
}
/* If Call was interrupted by a signal, retry the call */
else if (errno == EINTR) {
;
}
/* Otherwise this is a real error that we need to deal with */
else {
*state = OPAL_CRS_ERROR;
opal_output(mca_crs_blcr_component.super.output_handle,
"crs:blcr: checkpoint(): Error: Unable to checkpoint pid (%d) to file (%s) - poll failed with (%d)",
pid, loc_fname, ret);
exit_status = ret;
goto cleanup;
}
}
} while( ret < 0 );
/* Close the file */
close(cr_args.cr_fd);
#else
/* Request a checkpoint be taken of the current process.
* Since we are not guaranteed to finish the checkpoint before this
* returns, we also need to wait for it.
*/
cr_request_file(loc_fname);
/* Wait for checkpoint to finish */
do {
usleep(1000); /* JJH Do we really want to sleep? */
} while(CR_STATE_IDLE != cr_status());
#endif
#endif
*state = blcr_current_state;
free(loc_fname);
cleanup:
if( NULL != snapshot->super.metadata ) {
fclose(snapshot->super.metadata );
snapshot->super.metadata = NULL;
}
return exit_status;
}
