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PR/45539: Greg A. Woods: add support for getrusage(2) memory size statistics

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This commit is contained in:
christos 2011-10-29 15:58:38 +00:00
parent 12a1c915b2
commit 1cf831f6ff
1 changed files with 27 additions and 2 deletions
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29
sys/kern/kern_clock.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_clock.c,v 1.128 2011/07/27 14:35:33 uebayasi Exp $ */
/* $NetBSD: kern_clock.c,v 1.129 2011/10/29 15:58:38 christos Exp $ */
/*-
* Copyright (c) 2000, 2004, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@ -69,7 +69,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_clock.c,v 1.128 2011/07/27 14:35:33 uebayasi Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_clock.c,v 1.129 2011/10/29 15:58:38 christos Exp $");
#include "opt_ntp.h"
#include "opt_perfctrs.h"
@ -429,7 +429,32 @@ statclock(struct clockframe *frame)
}
spc->spc_pscnt = psdiv;
/*
* If the CPU is currently scheduled to a non-idle process, then charge
* that process with the appropriate VM resource utilization for a tick.
*
* Assume that the current process has been running the entire last
* tick, and account for VM use regardless of whether in user mode or
* system mode (XXX or interrupt mode?).
*
* rusage VM stats are expressed in kilobytes * ticks-of-execution.
*/
/* based on code from 4.3BSD kern_clock.c and from FreeBSD */
if (p != NULL) {
struct vmspace *vm = p->p_vmspace;
struct rusage *ru = &p->p_stats->p_ru;
long rss;
#define pg2kb(n) (((n) * PAGE_SIZE) / 1024)
ru->ru_idrss += pg2kb(vm->vm_dsize); /* unshared data */
ru->ru_isrss += pg2kb(vm->vm_ssize); /* unshared stack */
ru->ru_ixrss += pg2kb(vm->vm_tsize); /* "shared" text? */
rss = pg2kb(vm_resident_count(vm));
if (rss > ru->ru_maxrss)
ru->ru_maxrss = rss;
atomic_inc_uint(&l->l_cpticks);
mutex_spin_exit(&p->p_stmutex);
}