static void gather_node_cpus(char *cpus, long nd)
{
int ncpus = 0;
int i;
long online;
char buf[BUFSIZ];
char path[BUFSIZ], path1[BUFSIZ];
while (path_exist(PATH_SYS_SYSTEM "/cpu/cpu%d", ncpus))
ncpus++;
for (i = 0; i < ncpus; i++) {
snprintf(path, BUFSIZ,
PATH_SYS_SYSTEM "/node/node%ld/cpu%d", nd, i);
if (path_exist(path)) {
snprintf(path1, BUFSIZ, "%s/online", path);
/*
* if there is no online knob, then the cpu cannot
* be taken offline
*/
if (path_exist(path1)) {
SAFE_FILE_SCANF(cleanup, path1, "%ld", &online);
if (online == 0)
continue;
}
sprintf(buf, "%d,", i);
strcat(cpus, buf);
}
}
/* Remove the trailing comma. */
cpus[strlen(cpus) - 1] = '\0';
}
static int cpu_enable(cpu_set_t *cpu_set, size_t setsize, int enable)
{
unsigned int cpu;
int online, rc;
int configured = -1;
for (cpu = 0; cpu < setsize; cpu++) {
if (!CPU_ISSET(cpu, cpu_set))
continue;
if (!path_exist(_PATH_SYS_CPU "/cpu%d", cpu)) {
printf(_("CPU %d does not exist\n"), cpu);
continue;
}
if (!path_exist(_PATH_SYS_CPU "/cpu%d/online", cpu)) {
printf(_("CPU %d is not hot pluggable\n"), cpu);
continue;
}
online = path_getnum(_PATH_SYS_CPU "/cpu%d/online", cpu);
if ((online == 1) && (enable == 1)) {
printf(_("CPU %d is already enabled\n"), cpu);
continue;
}
if ((online == 0) && (enable == 0)) {
printf(_("CPU %d is already disabled\n"), cpu);
continue;
}
if (path_exist(_PATH_SYS_CPU "/cpu%d/configure", cpu))
configured = path_getnum(_PATH_SYS_CPU "/cpu%d/configure", cpu);
if (enable) {
rc = path_writestr("1", _PATH_SYS_CPU "/cpu%d/online", cpu);
if ((rc == -1) && (configured == 0))
printf(_("CPU %d enable failed "
"(CPU is deconfigured)\n"), cpu);
else if (rc == -1)
printf(_("CPU %d enable failed (%m)\n"), cpu);
else
printf(_("CPU %d enabled\n"), cpu);
} else {
if (onlinecpus && num_online_cpus() == 1) {
printf(_("CPU %d disable failed "
"(last enabled CPU)\n"), cpu);
continue;
}
rc = path_writestr("0", _PATH_SYS_CPU "/cpu%d/online", cpu);
if (rc == -1)
printf(_("CPU %d disable failed (%m)\n"), cpu);
else {
printf(_("CPU %d disabled\n"), cpu);
if (onlinecpus)
CPU_CLR(cpu, onlinecpus);
}
}
}
return EXIT_SUCCESS;
}
int ipc_sem_get_limits(struct ipc_limits *lim)
{
FILE *f;
int rc = 0;
lim->semvmx = SEMVMX;
f = path_fopen("r", 0, _PATH_PROC_IPC_SEM);
if (f) {
rc = fscanf(f, "%d\t%d\t%d\t%d",
&lim->semmsl, &lim->semmns, &lim->semopm, &lim->semmni);
fclose(f);
}
if (rc == 4) {
struct seminfo seminfo;
union semun arg = { .array = (ushort *) &seminfo };
if (semctl(0, 0, IPC_INFO, arg) < 0)
return 1;
lim->semmni = seminfo.semmni;
lim->semmsl = seminfo.semmsl;
lim->semmns = seminfo.semmns;
lim->semopm = seminfo.semopm;
}
return 0;
}
int ipc_shm_get_limits(struct ipc_limits *lim)
{
lim->shmmin = SHMMIN;
if (path_exist(_PATH_PROC_IPC_SHMALL) &&
path_exist(_PATH_PROC_IPC_SHMMAX) &&
path_exist(_PATH_PROC_IPC_SHMMNI)) {
lim->shmall = path_read_u64(_PATH_PROC_IPC_SHMALL);
lim->shmmax = path_read_u64(_PATH_PROC_IPC_SHMMAX);
lim->shmmni = path_read_u64(_PATH_PROC_IPC_SHMMNI);
} else {
struct shminfo shminfo;
if (shmctl(0, IPC_INFO, (struct shmid_ds *) &shminfo) < 0)
return 1;
lim->shmmni = shminfo.shmmni;
lim->shmall = shminfo.shmall;
}
return 0;
}
/* returns: 0 = success
* < 0 = failure
* > 0 = partial success
*/
static int cpu_configure(cpu_set_t *cpu_set, size_t setsize, int configure)
{
unsigned int cpu;
int rc, current;
size_t fails = 0;
for (cpu = 0; cpu < setsize; cpu++) {
if (!CPU_ISSET(cpu, cpu_set))
continue;
if (!path_exist(_PATH_SYS_CPU "/cpu%d", cpu)) {
warnx(_("CPU %u does not exist"), cpu);
fails++;
continue;
}
if (!path_exist(_PATH_SYS_CPU "/cpu%d/configure", cpu)) {
warnx(_("CPU %u is not configurable"), cpu);
fails++;
continue;
}
current = path_read_s32(_PATH_SYS_CPU "/cpu%d/configure", cpu);
if ((current == 1) && (configure == 1)) {
printf(_("CPU %u is already configured\n"), cpu);
continue;
}
if ((current == 0) && (configure == 0)) {
printf(_("CPU %u is already deconfigured\n"), cpu);
continue;
}
if ((current == 1) && (configure == 0) && onlinecpus &&
is_cpu_online(cpu)) {
warnx(_("CPU %u deconfigure failed (CPU is enabled)"), cpu);
fails++;
continue;
}
if (configure) {
rc = path_write_str("1", _PATH_SYS_CPU "/cpu%d/configure", cpu);
if (rc == -1) {
warn(_("CPU %u configure failed"), cpu);
fails++;
} else
printf(_("CPU %u configured\n"), cpu);
} else {
rc = path_write_str("0", _PATH_SYS_CPU "/cpu%d/configure", cpu);
if (rc == -1) {
warn(_("CPU %u deconfigure failed"), cpu);
fails++;
} else
printf(_("CPU %u deconfigured\n"), cpu);
}
}
return fails == 0 ? 0 : fails == setsize ? -1 : 1;
}
static int cpu_configure(cpu_set_t *cpu_set, size_t setsize, int configure)
{
unsigned int cpu;
int rc, current;
for (cpu = 0; cpu < setsize; cpu++) {
if (!CPU_ISSET(cpu, cpu_set))
continue;
if (!path_exist(_PATH_SYS_CPU "/cpu%d", cpu)) {
printf(_("CPU %d does not exist\n"), cpu);
continue;
}
if (!path_exist(_PATH_SYS_CPU "/cpu%d/configure", cpu)) {
printf(_("CPU %d is not configurable\n"), cpu);
continue;
}
current = path_getnum(_PATH_SYS_CPU "/cpu%d/configure", cpu);
if ((current == 1) && (configure == 1)) {
printf(_("CPU %d is already configured\n"), cpu);
continue;
}
if ((current == 0) && (configure == 0)) {
printf(_("CPU %d is already deconfigured\n"), cpu);
continue;
}
if ((current == 1) && (configure == 0) && onlinecpus &&
is_cpu_online(cpu)) {
printf(_("CPU %d deconfigure failed "
"(CPU is enabled)\n"), cpu);
continue;
}
if (configure) {
rc = path_writestr("1", _PATH_SYS_CPU "/cpu%d/configure", cpu);
if (rc == -1)
printf(_("CPU %d configure failed (%m)\n"), cpu);
else
printf(_("CPU %d configured\n"), cpu);
} else {
rc = path_writestr("0", _PATH_SYS_CPU "/cpu%d/configure", cpu);
if (rc == -1)
printf(_("CPU %d deconfigure failed (%m)\n"), cpu);
else
printf(_("CPU %d deconfigured\n"), cpu);
}
}
return EXIT_SUCCESS;
}
static void _gather_cpus(char *cpus, long nd)
{
int ncpus = 0;
int i;
char buf[BUFSIZ];
while (path_exist(PATH_SYS_SYSTEM "/cpu/cpu%d", ncpus))
ncpus++;
for (i = 0; i < ncpus; i++)
if (path_exist(PATH_SYS_SYSTEM "/node/node%ld/cpu%d", nd, i)) {
sprintf(buf, "%d,", i);
strcat(cpus, buf);
}
/* Remove the trailing comma. */
cpus[strlen(cpus) - 1] = '\0';
}
int path_exists(int *maze, int M, int N, int x1, int y1, int x2, int y2)
{
if (x1 >= M || x1 < 0 || x2 >= M || x2 < 0 || y1 >= N || y1 < 0 || y2 >= N || y2 < 0)
return 0;
if (maze[x2*N + y2] == 0 || maze[x1*N + y1] == 0)
return 0;
return path_exist(maze, M, N, x1, y1, x2, y2);
}
static int cpu_rescan(void)
{
if (!path_exist(_PATH_SYS_CPU_RESCAN))
errx(EXIT_FAILURE, _("This system does not support rescanning of CPUs"));
if (path_writestr("1", _PATH_SYS_CPU_RESCAN) == -1)
err(EXIT_FAILURE, _("Failed to trigger rescan of CPUs"));
printf(_("Triggered rescan of CPUs\n"));
return EXIT_SUCCESS;
}
static long count_cpu(void)
{
int ncpus = 0;
while (path_exist(PATH_SYS_SYSTEM "/cpu/cpu%d", ncpus))
ncpus++;
return ncpus;
}
long count_numa(void)
{
int nnodes = 0;
while(path_exist(PATH_SYS_SYSTEM "/node/node%d", nnodes))
nnodes++;
return nnodes;
}
int ipc_msg_get_limits(struct ipc_limits *lim)
{
if (path_exist(_PATH_PROC_IPC_MSGMNI) &&
path_exist(_PATH_PROC_IPC_MSGMNB) &&
path_exist(_PATH_PROC_IPC_MSGMAX)) {
lim->msgmni = path_read_s32(_PATH_PROC_IPC_MSGMNI);
lim->msgmnb = path_read_s32(_PATH_PROC_IPC_MSGMNB);
lim->msgmax = path_read_s32(_PATH_PROC_IPC_MSGMAX);
} else {
struct msginfo msginfo;
if (msgctl(0, IPC_INFO, (struct msqid_ds *) &msginfo) < 0)
return 1;
lim->msgmni = msginfo.msgmni;
lim->msgmnb = msginfo.msgmnb;
lim->msgmax = msginfo.msgmax;
}
return 0;
}
/*
Find if there is a connecting path between two given points in the maze.
The maze is a matrix of order MxN, check if there exists a path between (x1,y1) and (x2,y2).
Two points are said to connected if there is a series of 1's non-diagonally.
Example:
Maze of order 4x4:
1 0 1 0
1 1 0 0
0 1 0 1
0 1 1 1
(x1,y1):(0,0)
(x2,y2):(2,3)
In this case, there exists a connected path:
1
1 1
1 1
1 1 1
Since there is a connected path, your function has to return 1.
If a path doesn't exist between two co-ordinates then return 0.
If the co-ordinates are invalid or size of the matrix is invalid then return 0.
Function Prototype :path_exists(int *maze, int rows, int columns, int x1, int y1, int x2, int y2) ;
Maze: Pointer to first element of an array .
rows : No of rows
columns : Columns
x1,x2,y1,y2: Co-ordinates
Hint : You can use path_exists as a wrapper function for your original recursive function which might take
more parameters .
*/
int path_exist(int *maze, int M, int N, int x1, int y1, int x2, int y2)
{
int x, y, a = 0, b = 0, t, c = 0, d = 0;
if (x1 == x2 && y1 == y2)
return 1;
t = maze[x1*N + y1];
maze[x1*N + y1] = -1;
if (x1 - 1 >= 0)
if (maze[(x1 - 1)*N + y1] == 1)
a = path_exist(maze, M, N, x1 - 1, y1, x2, y2);
if (x1 + 1 < M)
if (maze[(x1 + 1)*N + y1] == 1)
b = path_exist(maze, M, N, x1 + 1, y1, x2, y2);
if (y1 - 1 >= 0)
if (maze[(x1)*N + y1 - 1] == 1)
c = path_exist(maze, M, N, x1, y1 - 1, x2, y2);
if (y1 + 1<N)
if (maze[(x1)*N + y1 + 1] == 1)
d = path_exist(maze, M, N, x1, y1 + 1, x2, y2);
maze[x1*N + y1] = t;
if (a == 1 || b == 1 || c == 1 || d == 1)
return 1;
return 0;
}
//-------------------------------------------------------------------
// FileName::recursive_chmod_dir
//-------------------------------------------------------------------
void FileName::recursive_chmod_dir(mode_t mode) throw( Exception )
{
if( !path_exist() )
{ // File doesn't exists
String strErr = String::str_format(ERR_DIR_NOT_FOUND, PSZ(full_name()));
throw FileNotFoundException(PSZ(strErr), "FileName::recursive_chmod_dir");
}
// Recursively change rights on sub-directories
FileEnum dirEnum(full_name(), FileEnum::ENUM_DIR);
while( dirEnum.find() )
dirEnum.recursive_chmod_dir(mode);
// Change mode to directory itself
chmod(mode);
}
static int cpu_set_dispatch(int mode)
{
if (!path_exist(_PATH_SYS_CPU_DISPATCH))
errx(EXIT_FAILURE, _("This system does not support setting "
"the dispatching mode of CPUs"));
if (mode == 0) {
if (path_writestr("0", _PATH_SYS_CPU_DISPATCH) == -1)
err(EXIT_FAILURE, _("Failed to set horizontal dispatch mode"));
printf(_("Successfully set horizontal dispatching mode\n"));
} else {
if (path_writestr("1", _PATH_SYS_CPU_DISPATCH) == -1)
err(EXIT_FAILURE, _("Failed to set vertical dispatch mode"));
printf(_("Successfully set vertical dispatching mode\n"));
}
return EXIT_SUCCESS;
}
//-------------------------------------------------------------------
// FileName::recursive_chown
//-------------------------------------------------------------------
void FileName::recursive_chown(uid_t uid, gid_t gid) throw( Exception )
{
if( !path_exist() )
{ // File doesn't exists
String strErr = String::str_format(ERR_DIR_NOT_FOUND, PSZ(full_name()));
throw FileNotFoundException(PSZ(strErr), "FileName::recursive_chmod");
}
// Recursively change rights on sub-directories
FileEnum dirEnum(full_name(), FileEnum::ENUM_DIR);
while( dirEnum.find() )
dirEnum.recursive_chmod(uid, gid);
// Change mode on files
FileEnum fileEnum(full_name(), FileEnum::ENUM_FILE);
while( fileEnum.find() )
// Copy with metadata
fileEnum.chown(uid, gid);
// Change mode to directory itself
chown(uid, gid);
}
/* CORPO DELLE FUNZIONI */
int main(int argc, char *argv[])
{
stack_t *input;
item_t *comand;
user_t *user = NULL;
/* se non esiste la cartella base, la creiamo */
if(path_exist(BASE) < 0){
if(create_directory(BASE, 0777) < 0){
perror("create_directory");
exit(EXIT_FAILURE);
}
}
/* leggiamo l'input da linea comando */
input = read_input(argv, argc);
if(input == NULL){
perror("read_input");
exit(EXIT_FAILURE);
}
/* ordiniamo le richieste */
stack_sort(input);
/* eseguimo tutte le richieste */
while(input ->len > 0){
/* estraiamo l'azione corrente */
comand = stack_pop(input);
if(comand == NULL){
perror("stack_pop");
exit(EXIT_FAILURE);
}
/* eseguiamo il comando */
if(execute_comand(comand ->value, comand ->arg, &user) < 0){
perror("execute_program");
exit(EXIT_FAILURE);
}
}
/* usciamo dal programma */
exit(EXIT_SUCCESS);
}
int
_linux_get_cpu_info( PAPI_hw_info_t * hwinfo )
{
int tmp, retval = PAPI_OK;
char maxargs[PAPI_HUGE_STR_LEN], *t, *s;
float mhz = 0.0;
FILE *f;
if ( ( f = fopen( "/proc/cpuinfo", "r" ) ) == NULL ) {
PAPIERROR( "fopen(/proc/cpuinfo) errno %d", errno );
return PAPI_ESYS;
}
/* All of this information maybe overwritten by the substrate */
/* MHZ */
rewind( f );
s = search_cpu_info( f, "clock", maxargs );
if ( !s ) {
rewind( f );
s = search_cpu_info( f, "cpu MHz", maxargs );
}
if ( s )
sscanf( s + 1, "%f", &mhz );
hwinfo->mhz = mhz;
hwinfo->clock_mhz = ( int ) mhz;
/* Vendor Name and Vendor Code */
rewind( f );
s = search_cpu_info( f, "vendor_id", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
strcpy( hwinfo->vendor_string, s + 2 );
} else {
rewind( f );
s = search_cpu_info( f, "vendor", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
strcpy( hwinfo->vendor_string, s + 2 );
} else {
rewind( f );
s = search_cpu_info( f, "system type", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
s = strtok( s + 2, " " );
strcpy( hwinfo->vendor_string, s );
} else {
rewind( f );
s = search_cpu_info( f, "platform", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
s = strtok( s + 2, " " );
if ( ( strcasecmp( s, "pSeries" ) == 0 ) ||
( strcasecmp( s, "PowerMac" ) == 0 ) ) {
strcpy( hwinfo->vendor_string, "IBM" );
}
} else {
rewind( f );
s = search_cpu_info( f, "CPU implementer",
maxargs );
if ( s ) {
strcpy( hwinfo->vendor_string, "ARM" );
}
}
}
}
}
if ( strlen( hwinfo->vendor_string ) )
decode_vendor_string( hwinfo->vendor_string, &hwinfo->vendor );
/* Revision */
rewind( f );
s = search_cpu_info( f, "stepping", maxargs );
if ( s ) {
sscanf( s + 1, "%d", &tmp );
hwinfo->revision = ( float ) tmp;
hwinfo->cpuid_stepping = tmp;
} else {
rewind( f );
s = search_cpu_info( f, "revision", maxargs );
if ( s ) {
sscanf( s + 1, "%d", &tmp );
hwinfo->revision = ( float ) tmp;
hwinfo->cpuid_stepping = tmp;
}
}
/* Model Name */
rewind( f );
s = search_cpu_info( f, "model name", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
strcpy( hwinfo->model_string, s + 2 );
} else {
rewind( f );
s = search_cpu_info( f, "family", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
strcpy( hwinfo->model_string, s + 2 );
} else {
rewind( f );
s = search_cpu_info( f, "cpu model", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
strtok( s + 2, " " );
s = strtok( NULL, " " );
strcpy( hwinfo->model_string, s );
} else {
rewind( f );
s = search_cpu_info( f, "cpu", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
/* get just the first token */
s = strtok( s + 2, " " );
strcpy( hwinfo->model_string, s );
}
}
}
}
/* Family */
rewind( f );
s = search_cpu_info( f, "family", maxargs );
if ( s ) {
sscanf( s + 1, "%d", &tmp );
hwinfo->cpuid_family = tmp;
} else {
rewind( f );
s = search_cpu_info( f, "cpu family", maxargs );
if ( s ) {
sscanf( s + 1, "%d", &tmp );
hwinfo->cpuid_family = tmp;
}
}
/* CPU Model */
rewind( f );
s = search_cpu_info( f, "model", maxargs );
if ( s ) {
sscanf( s + 1, "%d", &tmp );
hwinfo->model = tmp;
hwinfo->cpuid_model = tmp;
}
fclose( f );
/* The following new members are set using the same methodology used in lscpu. */
/* Total number of CPUs */
/* The following line assumes totalcpus was initialized to zero! */
while ( path_exist( _PATH_SYS_SYSTEM "/cpu/cpu%d", hwinfo->totalcpus ) )
hwinfo->totalcpus++;
/* Number of threads per core */
if ( path_exist( _PATH_SYS_CPU0 "/topology/thread_siblings" ) )
hwinfo->threads =
path_sibling( _PATH_SYS_CPU0 "/topology/thread_siblings" );
/* Number of cores per socket */
if ( path_exist( _PATH_SYS_CPU0 "/topology/core_siblings" ) &&
hwinfo->threads > 0 )
hwinfo->cores =
path_sibling( _PATH_SYS_CPU0 "/topology/core_siblings" ) /
hwinfo->threads;
/* Number of sockets */
if ( hwinfo->threads > 0 && hwinfo->cores > 0 )
hwinfo->sockets = hwinfo->ncpu / hwinfo->cores / hwinfo->threads;
/* Number of NUMA nodes */
/* The following line assumes nnodes was initialized to zero! */
while ( path_exist( _PATH_SYS_SYSTEM "/node/node%d", hwinfo->nnodes ) )
hwinfo->nnodes++;
/* Number of CPUs per node */
hwinfo->ncpu =
hwinfo->nnodes >
1 ? hwinfo->totalcpus / hwinfo->nnodes : hwinfo->totalcpus;
#if 0
int *nodecpu;
/* cpumap data is not currently part of the _papi_hw_info struct */
nodecpu = malloc( (unsigned int) hwinfo->nnodes * sizeof(int) );
if ( nodecpu ) {
int i;
for ( i = 0; i < hwinfo->nnodes; ++i ) {
nodecpu[i] = path_sibling(
_PATH_SYS_SYSTEM "/node/node%d/cpumap", i );
}
} else {
PAPIERROR( "malloc failed for variable not currently used" );
}
#endif
return retval;
}
int main(int argc, char *argv[])
{
cpu_set_t *cpu_set;
size_t setsize;
int cmd = -1;
int c, rc;
static const struct option longopts[] = {
{ "configure", required_argument, NULL, 'c' },
{ "deconfigure",required_argument, NULL, 'g' },
{ "disable", required_argument, NULL, 'd' },
{ "dispatch", required_argument, NULL, 'p' },
{ "enable", required_argument, NULL, 'e' },
{ "help", no_argument, NULL, 'h' },
{ "rescan", no_argument, NULL, 'r' },
{ "version", no_argument, NULL, 'V' },
{ NULL, 0, NULL, 0 }
};
static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
{ 'c','d','e','g','p' },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
maxcpus = get_max_number_of_cpus();
if (maxcpus < 1)
errx(EXIT_FAILURE, _("cannot determine NR_CPUS; aborting"));
if (path_exist(_PATH_SYS_CPU_ONLINE))
onlinecpus = path_read_cpulist(maxcpus, _PATH_SYS_CPU_ONLINE);
setsize = CPU_ALLOC_SIZE(maxcpus);
cpu_set = CPU_ALLOC(maxcpus);
if (!cpu_set)
err(EXIT_FAILURE, _("cpuset_alloc failed"));
while ((c = getopt_long(argc, argv, "c:d:e:g:hp:rV", longopts, NULL)) != -1) {
err_exclusive_options(c, longopts, excl, excl_st);
switch (c) {
case 'c':
cmd = CMD_CPU_CONFIGURE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'd':
cmd = CMD_CPU_DISABLE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'e':
cmd = CMD_CPU_ENABLE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'g':
cmd = CMD_CPU_DECONFIGURE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'h':
usage(stdout);
case 'p':
if (strcmp("horizontal", argv[optind - 1]) == 0)
cmd = CMD_CPU_DISPATCH_HORIZONTAL;
else if (strcmp("vertical", argv[optind - 1]) == 0)
cmd = CMD_CPU_DISPATCH_VERTICAL;
else
errx(EXIT_FAILURE, _("unsupported argument: %s"),
argv[optind -1 ]);
break;
case 'r':
cmd = CMD_CPU_RESCAN;
break;
case 'V':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
default:
errtryhelp(EXIT_FAILURE);
}
}
if ((argc == 1) || (argc != optind))
usage(stderr);
switch (cmd) {
case CMD_CPU_ENABLE:
rc = cpu_enable(cpu_set, maxcpus, 1);
break;
case CMD_CPU_DISABLE:
rc = cpu_enable(cpu_set, maxcpus, 0);
break;
case CMD_CPU_CONFIGURE:
rc = cpu_configure(cpu_set, maxcpus, 1);
break;
case CMD_CPU_DECONFIGURE:
rc = cpu_configure(cpu_set, maxcpus, 0);
break;
case CMD_CPU_RESCAN:
rc = cpu_rescan();
break;
case CMD_CPU_DISPATCH_HORIZONTAL:
rc = cpu_set_dispatch(0);
break;
case CMD_CPU_DISPATCH_VERTICAL:
rc = cpu_set_dispatch(1);
break;
default:
rc = -EINVAL;
break;
}
return rc == 0 ? EXIT_SUCCESS :
rc < 0 ? EXIT_FAILURE : CHCPU_EXIT_SOMEOK;
}
/* returns: 0 = success
* < 0 = failure
* > 0 = partial success
*/
static int cpu_enable(cpu_set_t *cpu_set, size_t setsize, int enable)
{
unsigned int cpu;
int online, rc;
int configured = -1;
size_t fails = 0;
for (cpu = 0; cpu < setsize; cpu++) {
if (!CPU_ISSET(cpu, cpu_set))
continue;
if (!path_exist(_PATH_SYS_CPU "/cpu%d", cpu)) {
warnx(_("CPU %u does not exist"), cpu);
fails++;
continue;
}
if (!path_exist(_PATH_SYS_CPU "/cpu%d/online", cpu)) {
warnx(_("CPU %u is not hot pluggable"), cpu);
fails++;
continue;
}
online = path_read_s32(_PATH_SYS_CPU "/cpu%d/online", cpu);
if ((online == 1) && (enable == 1)) {
printf(_("CPU %u is already enabled\n"), cpu);
continue;
}
if ((online == 0) && (enable == 0)) {
printf(_("CPU %u is already disabled\n"), cpu);
continue;
}
if (path_exist(_PATH_SYS_CPU "/cpu%d/configure", cpu))
configured = path_read_s32(_PATH_SYS_CPU "/cpu%d/configure", cpu);
if (enable) {
rc = path_write_str("1", _PATH_SYS_CPU "/cpu%d/online", cpu);
if ((rc == -1) && (configured == 0)) {
warn(_("CPU %u enable failed (CPU is deconfigured)"), cpu);
fails++;
} else if (rc == -1) {
warn(_("CPU %u enable failed"), cpu);
fails++;
} else
printf(_("CPU %u enabled\n"), cpu);
} else {
if (onlinecpus && num_online_cpus() == 1) {
warnx(_("CPU %u disable failed (last enabled CPU)"), cpu);
fails++;
continue;
}
rc = path_write_str("0", _PATH_SYS_CPU "/cpu%d/online", cpu);
if (rc == -1) {
warn(_("CPU %u disable failed"), cpu);
fails++;
} else {
printf(_("CPU %u disabled\n"), cpu);
if (onlinecpus)
CPU_CLR(cpu, onlinecpus);
}
}
}
return fails == 0 ? 0 : fails == setsize ? -1 : 1;
}
int
_linux_get_cpu_info( PAPI_hw_info_t *hwinfo, int *cpuinfo_mhz )
{
int retval = PAPI_OK;
unsigned int strSize;
char maxargs[PAPI_HUGE_STR_LEN], *t, *s;
float mhz = 0.0;
FILE *f;
char cpuinfo_filename[]="/proc/cpuinfo";
if ( ( f = fopen( cpuinfo_filename, "r" ) ) == NULL ) {
PAPIERROR( "fopen(/proc/cpuinfo) errno %d", errno );
return PAPI_ESYS;
}
/* All of this information may be overwritten by the component */
/***********************/
/* Attempt to find MHz */
/***********************/
rewind( f );
s = search_cpu_info( f, "clock", maxargs );
if ( !s ) {
rewind( f );
s = search_cpu_info( f, "cpu MHz", maxargs );
}
if ( s ) {
sscanf( s + 1, "%f", &mhz );
}
*cpuinfo_mhz = mhz;
/*******************************/
/* Vendor Name and Vendor Code */
/*******************************/
/* First try to read "vendor_id" field */
/* Which is the most common field */
hwinfo->vendor_string[0]=0;
rewind( f );
s = search_cpu_info( f, "vendor_id", maxargs );
strSize = sizeof(hwinfo->vendor_string);
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
if (strlen(s+2) >= strSize-1) {
s[strSize+1] = '\0';
}
strcpy( hwinfo->vendor_string, s + 2 );
}
/* If not found, try "vendor" which seems to be Itanium specific */
if (!hwinfo->vendor_string[0]) {
rewind( f );
s = search_cpu_info( f, "vendor", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
if (strlen(s+2) >= strSize-1) {
s[strSize+1] = '\0';
}
strcpy( hwinfo->vendor_string, s + 2 );
}
}
/* "system type" seems to be MIPS and Alpha */
if (!hwinfo->vendor_string[0]) {
rewind( f );
s = search_cpu_info( f, "system type", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
s = strtok( s + 2, " " );
if (strlen(s) >= strSize-1) {
s[strSize-1] = '\0';
}
strcpy( hwinfo->vendor_string, s );
}
}
/* "platform" indicates Power */
if (!hwinfo->vendor_string[0]) {
rewind( f );
s = search_cpu_info( f, "platform", maxargs );
if ( s && ( t = strchr( s + 2, '\n' ) ) ) {
*t = '\0';
s = strtok( s + 2, " " );
if ( ( strcasecmp( s, "pSeries" ) == 0 ) ||
( strcasecmp( s, "PowerNV" ) == 0 ) ||
( strcasecmp( s, "PowerMac" ) == 0 ) ) {
strcpy( hwinfo->vendor_string, "IBM" );
}
}
}
/* "CPU implementer" indicates ARM */
if (!hwinfo->vendor_string[0]) {
rewind( f );
s = search_cpu_info( f, "CPU implementer", maxargs );
if ( s ) {
strcpy( hwinfo->vendor_string, "ARM" );
}
}
/* Decode the string to an implementer value */
if ( strlen( hwinfo->vendor_string ) ) {
decode_vendor_string( hwinfo->vendor_string, &hwinfo->vendor );
}
/**********************************************/
/* Provide more stepping/model/family numbers */
/**********************************************/
if ((hwinfo->vendor==PAPI_VENDOR_INTEL) ||
(hwinfo->vendor==PAPI_VENDOR_AMD)) {
decode_cpuinfo_x86(f,hwinfo);
}
if (hwinfo->vendor==PAPI_VENDOR_IBM) {
decode_cpuinfo_power(f,hwinfo);
}
if (hwinfo->vendor==PAPI_VENDOR_ARM) {
decode_cpuinfo_arm(f,hwinfo);
}
/* The following members are set using the same methodology */
/* used in lscpu. */
/* Total number of CPUs */
/* The following line assumes totalcpus was initialized to zero! */
while ( path_exist( _PATH_SYS_SYSTEM "/cpu/cpu%d", hwinfo->totalcpus ) )
hwinfo->totalcpus++;
/* Number of threads per core */
if ( path_exist( _PATH_SYS_CPU0 "/topology/thread_siblings" ) )
hwinfo->threads =
path_sibling( _PATH_SYS_CPU0 "/topology/thread_siblings" );
/* Number of cores per socket */
if ( path_exist( _PATH_SYS_CPU0 "/topology/core_siblings" ) &&
hwinfo->threads > 0 )
hwinfo->cores =
path_sibling( _PATH_SYS_CPU0 "/topology/core_siblings" ) /
hwinfo->threads;
/* Number of NUMA nodes */
/* The following line assumes nnodes was initialized to zero! */
while ( path_exist( _PATH_SYS_SYSTEM "/node/node%d", hwinfo->nnodes ) )
hwinfo->nnodes++;
/* Number of CPUs per node */
hwinfo->ncpu =
hwinfo->nnodes >
1 ? hwinfo->totalcpus / hwinfo->nnodes : hwinfo->totalcpus;
/* Number of sockets */
if ( hwinfo->threads > 0 && hwinfo->cores > 0 )
hwinfo->sockets = hwinfo->totalcpus / hwinfo->cores / hwinfo->threads;
#if 0
int *nodecpu;
/* cpumap data is not currently part of the _papi_hw_info struct */
nodecpu = malloc( (unsigned int) hwinfo->nnodes * sizeof(int) );
if ( nodecpu ) {
int i;
for ( i = 0; i < hwinfo->nnodes; ++i ) {
nodecpu[i] = path_sibling(
_PATH_SYS_SYSTEM "/node/node%d/cpumap", i );
}
} else {
PAPIERROR( "malloc failed for variable not currently used" );
}
#endif
/* Fixup missing Megahertz Value */
/* This is missing from cpuinfo on ARM and MIPS */
if (*cpuinfo_mhz < 1.0) {
rewind( f );
s = search_cpu_info( f, "BogoMIPS", maxargs );
if ((!s) || (sscanf( s + 1, "%f", &mhz ) != 1)) {
INTDBG("Mhz detection failed. Please edit file %s at line %d.\n",
__FILE__,__LINE__);
}
if (hwinfo->vendor == PAPI_VENDOR_MIPS) {
/* MIPS has 2x clock multiplier */
*cpuinfo_mhz = 2*(((int)mhz)+1);
/* Also update version info on MIPS */
rewind( f );
s = search_cpu_info( f, "cpu model", maxargs );
s = strstr(s+1," V")+2;
strtok(s," ");
sscanf(s, "%f ", &hwinfo->revision );
}
else {
/* In general bogomips is proportional to number of CPUs */
if (hwinfo->totalcpus) {
if (mhz!=0) *cpuinfo_mhz = mhz / hwinfo->totalcpus;
}
}
}
fclose( f );
return retval;
}
int main(int argc, char *argv[])
{
cpu_set_t *cpu_set;
size_t setsize;
int cmd = -1;
int c;
enum {
EXCL_NONE,
EXCL_CONFIGURE,
EXCL_DECONFIGURE,
EXCL_DISABLE,
EXCL_DISPATCH,
EXCL_ENABLE
};
int excl_any = EXCL_NONE;
static const struct option longopts[] = {
{ "configure", required_argument, 0, 'c' },
{ "deconfigure",required_argument, 0, 'g' },
{ "disable", required_argument, 0, 'd' },
{ "dispatch", required_argument, 0, 'p' },
{ "enable", required_argument, 0, 'e' },
{ "help", no_argument, 0, 'h' },
{ "rescan", no_argument, 0, 'r' },
{ "version", no_argument, 0, 'V' },
{ NULL, 0, 0, 0 }
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
maxcpus = get_max_number_of_cpus();
if (maxcpus < 1)
errx(EXIT_FAILURE, _("cannot determine NR_CPUS; aborting"));
if (path_exist(_PATH_SYS_CPU_ONLINE))
onlinecpus = path_cpulist(maxcpus, _PATH_SYS_CPU_ONLINE);
setsize = CPU_ALLOC_SIZE(maxcpus);
cpu_set = CPU_ALLOC(maxcpus);
if (!cpu_set)
err(EXIT_FAILURE, _("cpuset_alloc failed"));
while ((c = getopt_long(argc, argv, "c:d:e:g:hp:rV", longopts, NULL)) != -1) {
switch (c) {
case 'c':
exclusive_option(&excl_any, EXCL_CONFIGURE, EXCL_ERROR);
cmd = CMD_CPU_CONFIGURE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'd':
exclusive_option(&excl_any, EXCL_DISABLE, EXCL_ERROR);
cmd = CMD_CPU_DISABLE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'e':
exclusive_option(&excl_any, EXCL_ENABLE, EXCL_ERROR);
cmd = CMD_CPU_ENABLE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'g':
exclusive_option(&excl_any, EXCL_DECONFIGURE, EXCL_ERROR);
cmd = CMD_CPU_DECONFIGURE;
cpu_parse(argv[optind - 1], cpu_set, setsize);
break;
case 'h':
usage(stdout);
case 'p':
exclusive_option(&excl_any, EXCL_DISPATCH, EXCL_ERROR);
if (strcmp("horizontal", argv[optind - 1]) == 0)
cmd = CMD_CPU_DISPATCH_HORIZONTAL;
else if (strcmp("vertical", argv[optind - 1]) == 0)
cmd = CMD_CPU_DISPATCH_VERTICAL;
else
errx(EXIT_FAILURE, _("unsupported argument: %s"),
argv[optind -1 ]);
break;
case 'r':
cmd = CMD_CPU_RESCAN;
break;
case 'V':
printf(_("%s from %s\n"), program_invocation_short_name,
PACKAGE_STRING);
return EXIT_SUCCESS;
default:
usage(stderr);
}
}
if ((argc == 1) || (argc != optind))
usage(stderr);
switch (cmd) {
case CMD_CPU_ENABLE:
return cpu_enable(cpu_set, maxcpus, 1);
case CMD_CPU_DISABLE:
return cpu_enable(cpu_set, maxcpus, 0);
case CMD_CPU_CONFIGURE:
return cpu_configure(cpu_set, maxcpus, 1);
case CMD_CPU_DECONFIGURE:
return cpu_configure(cpu_set, maxcpus, 0);
case CMD_CPU_RESCAN:
return cpu_rescan();
case CMD_CPU_DISPATCH_HORIZONTAL:
return cpu_set_dispatch(0);
case CMD_CPU_DISPATCH_VERTICAL:
return cpu_set_dispatch(1);
}
return EXIT_SUCCESS;
}