diff options
| author | peter <peter@FreeBSD.org> | 2003-07-31 01:36:24 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 2003-07-31 01:36:24 +0000 |
| commit | 8dd9d4012aca49d211a0d43c6069beab71ed5a1c (patch) | |
| tree | 6f3fcc059b301833ffaa8a66037bf0741da35fc2 /sys/kern/subr_trap.c | |
| parent | 1c887bc40fa682bacdb7a897d6588ad0ab458f57 (diff) | |
| download | FreeBSD-src-8dd9d4012aca49d211a0d43c6069beab71ed5a1c.zip FreeBSD-src-8dd9d4012aca49d211a0d43c6069beab71ed5a1c.tar.gz | |
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.
Diffstat (limited to 'sys/kern/subr_trap.c')
| -rw-r--r-- | sys/kern/subr_trap.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c index 3c0a760..05d250d 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); |
