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BSD: implement virProcess{Get,Set}Affinity

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Implement virProcess{Get,Set}Affinity() using cpuset_getaffinity()
and cpuset_setaffinity() calls. Quick search showed that they are
only available on FreeBSD, so placed it inside existing #ifdef
blocks for FreeBSD instead of adding configure checks.
This commit is contained in:
Roman Bogorodskiy 2014-01-25 20:11:01 +04:00 committed by Eric Blake
parent c6320d3463
commit c022fbc9bb
1 changed files with 33 additions and 6 deletions
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39
src/util/virprocess.c
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@ -34,6 +34,7 @@
#ifdef __FreeBSD__
# include <sys/param.h>
# include <sys/cpuset.h>
# include <sys/sysctl.h>
# include <sys/user.h>
#endif
@ -461,23 +462,49 @@ realloc:
int virProcessSetAffinity(pid_t pid ATTRIBUTE_UNUSED,
virBitmapPtr map)
{
if (!virBitmapIsAllSet(map)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("setting process affinity isn't supported "
"on FreeBSD yet"));
size_t i;
cpuset_t mask;
bool set = false;
CPU_ZERO(&mask);
for (i = 0; i < virBitmapSize(map); i++) {
if (virBitmapGetBit(map, i, &set) < 0)
return -1;
if (set)
CPU_SET(i, &mask);
}
if (cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, pid,
sizeof(mask), &mask) != 0) {
virReportSystemError(errno,
_("cannot set CPU affinity on process %d"), pid);
return -1;
}
return 0;
}
int virProcessGetAffinity(pid_t pid ATTRIBUTE_UNUSED,
int virProcessGetAffinity(pid_t pid,
virBitmapPtr *map,
int maxcpu)
{
size_t i;
cpuset_t mask;
if (!(*map = virBitmapNew(maxcpu)))
return -1;
virBitmapSetAll(*map);
CPU_ZERO(&mask);
if (cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, pid,
sizeof(mask), &mask) != 0) {
virReportSystemError(errno,
_("cannot get CPU affinity of process %d"), pid);
return -1;
}
for (i = 0; i < maxcpu; i++)
if (CPU_ISSET(i, &mask))
ignore_value(virBitmapSetBit(*map, i));
return 0;
}