From aeaead20b8ddc92fd1dc0f4acbc7aeb2ce866b14 Mon Sep 17 00:00:00 2001 From: Peter Wemm <peter@FreeBSD.org> Date: Thu, 31 Jul 2003 01:36:24 +0000 Subject: [PATCH] When ktracing context switches, make sure we record involuntary switches. Otherwise, when we get a evicted from the cpu, there is no record of it. This is not a default ktrace flag. --- sys/kern/subr_trap.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c index 3c0a7604b0f9..05d250d395ee 100644 --- a/sys/kern/subr_trap.c +++ b/sys/kern/subr_trap.c @@ -40,6 +40,7 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include "opt_ktrace.h" #include "opt_mac.h" #ifdef __i386__ #include "opt_npx.h" @@ -59,6 +60,11 @@ __FBSDID("$FreeBSD$"); #include <sys/signalvar.h> #include <sys/systm.h> #include <sys/vmmeter.h> +#ifdef KTRACE +#include <sys/uio.h> +#include <sys/ktrace.h> +#endif + #include <machine/cpu.h> #include <machine/pcb.h> @@ -236,11 +242,19 @@ ast(struct trapframe *framep) mac_thread_userret(td); #endif if (flags & TDF_NEEDRESCHED) { +#ifdef KTRACE + if (KTRPOINT(td, KTR_CSW)) + ktrcsw(1, 0); +#endif mtx_lock_spin(&sched_lock); sched_prio(td, kg->kg_user_pri); p->p_stats->p_ru.ru_nivcsw++; mi_switch(); mtx_unlock_spin(&sched_lock); +#ifdef KTRACE + if (KTRPOINT(td, KTR_CSW)) + ktrcsw(0, 0); +#endif } if (flags & TDF_NEEDSIGCHK) { PROC_LOCK(p);