static int gasnetc_init(int *argc, char ***argv) {
int retval = GASNET_OK;
/* check system sanity */
gasnetc_check_config();
/* --------- begin Master code ------------ */
if (!AMUDP_SPMDIsWorker(argv?*argv:NULL)) {
/* assume we're an implicit master
(we don't currently support explicit workers spawned
without using the AMUDP SPMD API)
*/
int num_nodes;
int i;
char spawnfn;
amudp_spawnfn_t fp = (amudp_spawnfn_t)NULL;
if (!argv) {
gasneti_fatalerror("implicit-master without argv not supported - use amudprun");
}
/* pretend we're node 0, for purposes of verbose env reporting */
gasneti_init_done = 1;
gasneti_mynode = 0;
#if defined(GASNET_CSPAWN_CMD)
{ /* set configure default cspawn cmd */
const char *cmd = gasneti_getenv_withdefault("GASNET_CSPAWN_CMD",GASNET_CSPAWN_CMD);
gasneti_setenv("GASNET_CSPAWN_CMD",cmd);
}
#endif
/* parse node count from command line */
if (*argc < 2) {
fprintf(stderr, "GASNet: Missing parallel node count\n");
fprintf(stderr, "GASNet: Specify node count as first argument, or use upcrun/tcrun spawner script to start job\n");
fprintf(stderr, "GASNet: Usage '%s <num_nodes> {program arguments}'\n", (*argv)[0]);
exit(-1);
}
/*
* argv[1] is number of nodes; argv[0] is program name; argv is
* list of arguments including program name and number of nodes.
* We need to remove argv[1] when the argument array is passed
* to the tic_main().
*/
num_nodes = atoi((*argv)[1]);
if (num_nodes < 1) {
fprintf (stderr, "GASNet: Invalid number of nodes: %s\n", (*argv)[1]);
fprintf (stderr, "GASNet: Usage '%s <num_nodes> {program arguments}'\n", (*argv)[0]);
exit (1);
}
/* remove the num_nodes argument */
for (i = 1; i < (*argc)-1; i++) {
(*argv)[i] = (*argv)[i+1];
}
(*argv)[(*argc)-1] = NULL;
(*argc)--;
/* get spawnfn */
spawnfn = *gasneti_getenv_withdefault("GASNET_SPAWNFN", _STRINGIFY(GASNETC_DEFAULT_SPAWNFN));
{ /* ensure we pass the effective spawnfn to worker env */
char spawnstr[2];
spawnstr[0] = toupper(spawnfn);
spawnstr[1] = '\0';
gasneti_setenv("GASNET_SPAWNFN",spawnstr);
}
/* ensure reliable localhost operation by forcing use of 127.0.0.1
* setting GASNET_MASTERIP to the empty string will prevent this */
if (('L' == toupper(spawnfn)) && !gasneti_getenv("GASNET_MASTERIP")) {
gasneti_setenv("GASNET_MASTERIP","127.0.0.1");
}
for (i=0; AMUDP_Spawnfn_Desc[i].abbrev; i++) {
if (toupper(spawnfn) == toupper(AMUDP_Spawnfn_Desc[i].abbrev)) {
fp = AMUDP_Spawnfn_Desc[i].fnptr;
break;
}
}
if (!fp) {
fprintf (stderr, "GASNet: Invalid spawn function specified in GASNET_SPAWNFN\n");
fprintf (stderr, "GASNet: The following mechanisms are available:\n");
for (i=0; AMUDP_Spawnfn_Desc[i].abbrev; i++) {
fprintf(stderr, " '%c' %s\n",
toupper(AMUDP_Spawnfn_Desc[i].abbrev), AMUDP_Spawnfn_Desc[i].desc);
}
exit(1);
}
#if GASNET_DEBUG_VERBOSE
/* note - can't call trace macros during gasnet_init because trace system not yet initialized */
fprintf(stderr,"gasnetc_init(): about to spawn...\n"); fflush(stderr);
#endif
retval = AMUDP_SPMDStartup(argc, argv,
num_nodes, 0, fp,
NULL, &gasnetc_bundle, &gasnetc_endpoint);
/* master startup should never return */
gasneti_fatalerror("master AMUDP_SPMDStartup() failed");
}
/* --------- begin Worker code ------------ */
AMLOCK();
if (gasneti_init_done)
INITERR(NOT_INIT, "GASNet already initialized");
gasneti_freezeForDebugger();
AMUDP_VerboseErrors = gasneti_VerboseErrors;
AMUDP_SPMDkillmyprocess = gasneti_killmyprocess;
/* perform job spawn */
retval = AMUDP_SPMDStartup(argc, argv,
0, 0, NULL, /* dummies */
&gasnetc_networkpid, &gasnetc_bundle, &gasnetc_endpoint);
if (retval != AM_OK) INITERR(RESOURCE, "slave AMUDP_SPMDStartup() failed");
gasneti_init_done = 1; /* enable early to allow tracing */
gasneti_conduit_getenv = (/* cast drops const */ gasneti_getenv_fn_t*)&AMUDP_SPMDgetenvMaster;
gasneti_mynode = AMUDP_SPMDMyProc();
gasneti_nodes = AMUDP_SPMDNumProcs();
/* enable tracing */
gasneti_trace_init(argc, argv);
GASNETI_AM_SAFE(AMUDP_SPMDSetExitCallback(gasnetc_traceoutput));
/* for local spawn, assume we want to wait-block */
if (gasneti_getenv("GASNET_SPAWNFN") && *gasneti_getenv("GASNET_SPAWNFN") == 'L') {
GASNETI_TRACE_PRINTF(C,("setting gasnet_set_waitmode(GASNET_WAIT_BLOCK) for localhost spawn"));
gasnet_set_waitmode(GASNET_WAIT_BLOCK);
}
#if GASNET_DEBUG_VERBOSE
fprintf(stderr,"gasnetc_init(): spawn successful - node %i/%i starting...\n",
gasneti_mynode, gasneti_nodes); fflush(stderr);
#endif
gasneti_nodemapInit(&gasnetc_bootstrapExchange, NULL, 0, 0);
#if GASNET_PSHM
gasneti_pshm_init(&gasnetc_bootstrapSNodeBroadcast, 0);
#endif
#if GASNET_SEGMENT_FAST || GASNET_SEGMENT_LARGE
{ uintptr_t limit;
#if HAVE_MMAP
limit = gasneti_mmapLimit((uintptr_t)-1, (uint64_t)-1,
&gasnetc_bootstrapExchange,
&gasnetc_bootstrapBarrier);
#else
limit = (intptr_t)-1;
#endif
gasneti_segmentInit(limit, &gasnetc_bootstrapExchange);
}
#elif GASNET_SEGMENT_EVERYTHING
/* segment is everything - nothing to do */
#else
#error Bad segment config
#endif
#if GASNET_BLCR
gasneti_checkpoint_guid = gasnetc_networkpid;
gasneti_checkpoint_init(NULL);
#endif
AMUNLOCK();
gasneti_auxseg_init(); /* adjust max seg values based on auxseg */
gasneti_assert(retval == GASNET_OK);
return retval;
done: /* error return while locked */
AMUNLOCK();
GASNETI_RETURN(retval);
}
static int gasnetc_init(int *argc, char ***argv, gex_Flags_t flags) {
int retval = GASNET_OK;
/* check system sanity */
gasnetc_check_config();
/* --------- begin Master code ------------ */
if (!AMUDP_SPMDIsWorker(argv?*argv:NULL)) {
/* assume we're an implicit master
(we don't currently support explicit workers spawned
without using the AMUDP SPMD API)
*/
int num_nodes;
int i;
char spawnfn;
amudp_spawnfn_t fp = (amudp_spawnfn_t)NULL;
if (!argv) {
gasneti_fatalerror("implicit-master without argv not supported - use amudprun");
}
/* pretend we're node 0, for purposes of verbose env reporting */
gasneti_init_done = 1;
gasneti_mynode = 0;
#if defined(GASNET_CSPAWN_CMD)
{ /* set configure default cspawn cmd */
const char *cmd = gasneti_getenv_withdefault("GASNET_CSPAWN_CMD",GASNET_CSPAWN_CMD);
gasneti_setenv("GASNET_CSPAWN_CMD",cmd);
}
#endif
/* parse node count from command line */
if (*argc < 2) {
fprintf(stderr, "GASNet: Missing parallel node count\n");
fprintf(stderr, "GASNet: Specify node count as first argument, or use upcrun/tcrun spawner script to start job\n");
fprintf(stderr, "GASNet: Usage '%s <num_nodes> {program arguments}'\n", (*argv)[0]);
exit(-1);
}
/*
* argv[1] is number of nodes; argv[0] is program name; argv is
* list of arguments including program name and number of nodes.
* We need to remove argv[1] when the argument array is passed
* to the tic_main().
*/
num_nodes = atoi((*argv)[1]);
if (num_nodes < 1) {
fprintf (stderr, "GASNet: Invalid number of nodes: %s\n", (*argv)[1]);
fprintf (stderr, "GASNet: Usage '%s <num_nodes> {program arguments}'\n", (*argv)[0]);
exit (1);
}
/* remove the num_nodes argument */
for (i = 1; i < (*argc)-1; i++) {
(*argv)[i] = (*argv)[i+1];
}
(*argv)[(*argc)-1] = NULL;
(*argc)--;
/* get spawnfn */
spawnfn = *gasneti_getenv_withdefault("GASNET_SPAWNFN", _STRINGIFY(GASNETC_DEFAULT_SPAWNFN));
{ /* ensure we pass the effective spawnfn to worker env */
char spawnstr[2];
spawnstr[0] = toupper(spawnfn);
spawnstr[1] = '\0';
gasneti_setenv("GASNET_SPAWNFN",spawnstr);
}
/* ensure reliable localhost operation by forcing use of 127.0.0.1
* setting GASNET_MASTERIP to the empty string will prevent this */
if (('L' == toupper(spawnfn)) && !gasneti_getenv("GASNET_MASTERIP")) {
gasneti_setenv("GASNET_MASTERIP","127.0.0.1");
}
for (i=0; AMUDP_Spawnfn_Desc[i].abbrev; i++) {
if (toupper(spawnfn) == toupper(AMUDP_Spawnfn_Desc[i].abbrev)) {
fp = AMUDP_Spawnfn_Desc[i].fnptr;
break;
}
}
if (!fp) {
fprintf (stderr, "GASNet: Invalid spawn function specified in GASNET_SPAWNFN\n");
fprintf (stderr, "GASNet: The following mechanisms are available:\n");
for (i=0; AMUDP_Spawnfn_Desc[i].abbrev; i++) {
fprintf(stderr, " '%c' %s\n",
toupper(AMUDP_Spawnfn_Desc[i].abbrev), AMUDP_Spawnfn_Desc[i].desc);
}
exit(1);
}
#if GASNET_DEBUG_VERBOSE
/* note - can't call trace macros during gasnet_init because trace system not yet initialized */
fprintf(stderr,"gasnetc_init(): about to spawn...\n"); fflush(stderr);
#endif
retval = AMUDP_SPMDStartup(argc, argv,
num_nodes, 0, fp,
NULL, &gasnetc_bundle, &gasnetc_endpoint);
/* master startup should never return */
gasneti_fatalerror("master AMUDP_SPMDStartup() failed");
}
/* --------- begin Worker code ------------ */
AMLOCK();
if (gasneti_init_done)
INITERR(NOT_INIT, "GASNet already initialized");
gasneti_freezeForDebugger();
AMX_VerboseErrors = gasneti_VerboseErrors;
AMUDP_SPMDkillmyprocess = gasneti_killmyprocess;
#if GASNETI_CALIBRATE_TSC
// Early x86*/Linux timer initialization before AMUDP_SPMDStartup()
//
// udp-conduit does not support user-provided values for GASNET_TSC_RATE*
// (which fine-tune timer calibration on x86/Linux). This is partially due
// to a dependency cycle at startup with envvar propagation, but more
// importantly because the retransmission algorithm (and hence all conduit
// comms) rely on gasnet timers to be accurate (at least approximately), so
// we don't allow the user to weaken or disable their calibration.
gasneti_unsetenv("GASNET_TSC_RATE");
gasneti_unsetenv("GASNET_TSC_RATE_TOLERANCE");
gasneti_unsetenv("GASNET_TSC_RATE_HARD_TOLERANCE");
GASNETI_TICKS_INIT();
#endif
/* perform job spawn */
retval = AMUDP_SPMDStartup(argc, argv,
0, 0, NULL, /* dummies */
&gasnetc_networkpid, &gasnetc_bundle, &gasnetc_endpoint);
if (retval != AM_OK) INITERR(RESOURCE, "slave AMUDP_SPMDStartup() failed");
gasneti_init_done = 1; /* enable early to allow tracing */
gasneti_getenv_hook = (/* cast drops const */ gasneti_getenv_fn_t*)&AMUDP_SPMDgetenvMaster;
gasneti_mynode = AMUDP_SPMDMyProc();
gasneti_nodes = AMUDP_SPMDNumProcs();
#if !GASNETI_CALIBRATE_TSC
/* Must init timers after global env, and preferably before tracing */
GASNETI_TICKS_INIT();
#endif
/* enable tracing */
gasneti_trace_init(argc, argv);
GASNETI_AM_SAFE(AMUDP_SPMDSetExitCallback(gasnetc_traceoutput));
/* for local spawn, assume we want to wait-block */
if (gasneti_getenv("GASNET_SPAWNFN") && *gasneti_getenv("GASNET_SPAWNFN") == 'L') {
GASNETI_TRACE_PRINTF(C,("setting gasnet_set_waitmode(GASNET_WAIT_BLOCK) for localhost spawn"));
gasnet_set_waitmode(GASNET_WAIT_BLOCK);
}
#if GASNET_DEBUG_VERBOSE
fprintf(stderr,"gasnetc_init(): spawn successful - node %i/%i starting...\n",
gasneti_mynode, gasneti_nodes); fflush(stderr);
#endif
gasneti_nodemapInit(&gasnetc_bootstrapExchange, NULL, 0, 0);
#if GASNET_PSHM
gasneti_pshm_init(&gasnetc_bootstrapSNodeBroadcast, 0);
#endif
uintptr_t mmap_limit;
#if HAVE_MMAP
mmap_limit = gasneti_mmapLimit((uintptr_t)-1, (uint64_t)-1,
&gasnetc_bootstrapExchange,
&gasnetc_bootstrapBarrier);
#else
// TODO-EX: we can at least look at rlimits but such logic belongs in conduit-indep code
mmap_limit = (intptr_t)-1;
#endif
/* allocate and attach an aux segment */
gasneti_auxsegAttach(mmap_limit, &gasnetc_bootstrapExchange);
/* determine Max{Local,GLobal}SegmentSize */
gasneti_segmentInit(mmap_limit, &gasnetc_bootstrapExchange, flags);
#if GASNET_BLCR
gasneti_checkpoint_guid = gasnetc_networkpid;
gasneti_checkpoint_init(NULL);
#endif
AMUNLOCK();
gasneti_assert(retval == GASNET_OK);
return retval;
done: /* error return while locked */
AMUNLOCK();
GASNETI_RETURN(retval);
}