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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* SUCH DAMAGE. |
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* |
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* |
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* $FreeBSD$ |
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* $FreeBSD: releng/10.0/sys/kern/kern_racct.c 248298 2013-03-14 23:20:18Z trasz $ |
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*/ |
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*/ |
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#include <sys/cdefs.h> |
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#include <sys/cdefs.h> |
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__FBSDID("$FreeBSD$"); |
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__FBSDID("$FreeBSD: releng/10.0/sys/kern/kern_racct.c 248298 2013-03-14 23:20:18Z trasz $"); |
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#include "opt_kdtrace.h" |
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#include "opt_kdtrace.h" |
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#include "opt_sched.h" |
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#include "opt_sched.h" |
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/* |
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/* |
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* There are some cases where the racct %cpu resource would grow |
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* There are some cases where the racct %cpu resource would grow |
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* beyond 100%. |
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* beyond 100% per core. |
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* For example in racct_proc_exit() we add the process %cpu usage |
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* For example in racct_proc_exit() we add the process %cpu usage |
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* to the ucred racct containers. If too many processes terminated |
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* to the ucred racct containers. If too many processes terminated |
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* in a short time span, the ucred %cpu resource could grow too much. |
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* in a short time span, the ucred %cpu resource could grow too much. |
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* Also, the 4BSD scheduler sometimes returns for a thread more than |
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* Also, the 4BSD scheduler sometimes returns for a thread more than |
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* 100% cpu usage. So we set a boundary here to 100%. |
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* 100% cpu usage. |
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* So we set a sane boundary here to 100% * the maxumum number of CPUs. |
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*/ |
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*/ |
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if ((resource == RACCT_PCTCPU) && |
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if ((resource == RACCT_PCTCPU) && |
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(racct->r_resources[RACCT_PCTCPU] > 100 * 1000000)) |
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(racct->r_resources[RACCT_PCTCPU] > 100 * 1000000 * (int64_t)MAXCPU)) |
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racct->r_resources[RACCT_PCTCPU] = 100 * 1000000; |
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racct->r_resources[RACCT_PCTCPU] = 100 * 1000000 * (int64_t)MAXCPU; |
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} |
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} |
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static int |
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static int |