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| author |   mpi <mpi@openbsd.org> | 2020-01-21 16:16:22 +0000 |
|---|---|---|
| committer | mpi <mpi@openbsd.org> | 2020-01-21 16:16:22 +0000 |
| commit | 91b2ecf67e2a667ccefd071f95f44a8068f1bbc4 (patch) | |
| tree | 4844bb05cf2473deb3060725603f0582ebfa6974 /sys/kern/sched_bsd.c | |
| parent | regen (diff) | |
| download | wireguard-openbsd-91b2ecf67e2a667ccefd071f95f44a8068f1bbc4.tar.xz wireguard-openbsd-91b2ecf67e2a667ccefd071f95f44a8068f1bbc4.zip | |
Import dt(4) a driver and framework for Dynamic Profiling.
The design is fairly simple: events, in the form of descriptors on a
ring, are being produced in any kernel context and being consumed by
a userland process reading /dev/dt.
Code and hooks are all guarded under '#if NDT > 0' so this commit
shouldn't introduce any change as long as dt(4) is disable in GENERIC.
ok kettenis@, visa@, jasper@, deraadt@
Diffstat (limited to 'sys/kern/sched_bsd.c')
| -rw-r--r-- | sys/kern/sched_bsd.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/kern/sched_bsd.c b/sys/kern/sched_bsd.c index 3b8c4a80536..9172bc7e24e 100644 --- a/sys/kern/sched_bsd.c +++ b/sys/kern/sched_bsd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sched_bsd.c,v 1.60 2019/12/11 07:30:09 guenther Exp $ */ +/* $OpenBSD: sched_bsd.c,v 1.61 2020/01/21 16:16:23 mpi Exp $ */ /* $NetBSD: kern_synch.c,v 1.37 1996/04/22 01:38:37 christos Exp $ */ /*- @@ -48,6 +48,7 @@ #include <sys/sched.h> #include <sys/timeout.h> #include <sys/smr.h> +#include <sys/tracepoint.h> #ifdef KTRACE #include <sys/ktrace.h> @@ -392,8 +393,12 @@ mi_switch(void) if (p != nextproc) { uvmexp.swtch++; + TRACEPOINT(sched, off__cpu, nextproc->p_tid, + nextproc->p_p->ps_pid); cpu_switchto(p, nextproc); + TRACEPOINT(sched, on__cpu, NULL); } else { + TRACEPOINT(sched, remain__cpu, NULL); p->p_stat = SONPROC; } |