Calculate the count of per-process cow faults. Export the count to
userspace using the obscure spare int field in struct kinfo_proc. Submitted by: Andrey Zonov <andrey zonov org> MFC after: 1 week
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2920997423
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4d34e019c4
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=235850
@ -878,6 +878,9 @@ fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
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kp->ki_childtime = kp->ki_childstime;
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timevaladd(&kp->ki_childtime, &kp->ki_childutime);
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FOREACH_THREAD_IN_PROC(p, td0)
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kp->ki_cow += td0->td_cow;
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tp = NULL;
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if (p->p_pgrp) {
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kp->ki_pgid = p->p_pgrp->pg_id;
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@ -990,6 +993,7 @@ fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
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kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
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kp->ki_pctcpu = sched_pctcpu(td);
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kp->ki_estcpu = td->td_estcpu;
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kp->ki_cow = td->td_cow;
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}
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/* We can't get this anymore but ps etc never used it anyway. */
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@ -247,6 +247,7 @@ struct thread {
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int td_slptick; /* (t) Time at sleep. */
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int td_blktick; /* (t) Time spent blocked. */
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int td_swvoltick; /* (t) Time at last SW_VOL switch. */
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u_int td_cow; /* (*) Number of copy-on-write faults */
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struct rusage td_ru; /* (t) rusage information. */
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struct rusage_ext td_rux; /* (t) Internal rusage information. */
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uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
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@ -159,7 +159,7 @@ struct kinfo_proc {
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u_int ki_estcpu; /* Time averaged value of ki_cpticks */
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u_int ki_slptime; /* Time since last blocked */
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u_int ki_swtime; /* Time swapped in or out */
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int ki_spareint1; /* unused (just here for alignment) */
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u_int ki_cow; /* number of copy-on-write faults */
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u_int64_t ki_runtime; /* Real time in microsec */
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struct timeval ki_start; /* starting time */
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struct timeval ki_childtime; /* time used by process children */
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@ -805,6 +805,7 @@ RetryFault:;
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if (!is_first_object_locked)
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VM_OBJECT_LOCK(fs.object);
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PCPU_INC(cnt.v_cow_faults);
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curthread->td_cow++;
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} else {
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prot &= ~VM_PROT_WRITE;
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}
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