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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/kern_sched.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/kern_sched.c')
| -rw-r--r-- | sys/kern/kern_sched.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/kern/kern_sched.c b/sys/kern/kern_sched.c index 46de8fa7800..e25993099ee 100644 --- a/sys/kern/kern_sched.c +++ b/sys/kern/kern_sched.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_sched.c,v 1.62 2019/11/04 18:06:03 visa Exp $ */ +/* $OpenBSD: kern_sched.c,v 1.63 2020/01/21 16:16:23 mpi Exp $ */ /* * Copyright (c) 2007, 2008 Artur Grabowski <art@openbsd.org> * @@ -26,6 +26,7 @@ #include <sys/mutex.h> #include <sys/task.h> #include <sys/smr.h> +#include <sys/tracepoint.h> #include <uvm/uvm_extern.h> @@ -261,6 +262,7 @@ setrunqueue(struct cpu_info *ci, struct proc *p, uint8_t prio) spc = &p->p_cpu->ci_schedstate; spc->spc_nrun++; + TRACEPOINT(sched, enqueue, p->p_tid, p->p_p->ps_pid); TAILQ_INSERT_TAIL(&spc->spc_qs[queue], p, p_runq); spc->spc_whichqs |= (1 << queue); @@ -282,6 +284,7 @@ remrunqueue(struct proc *p) SCHED_ASSERT_LOCKED(); spc = &p->p_cpu->ci_schedstate; spc->spc_nrun--; + TRACEPOINT(sched, dequeue, p->p_tid, p->p_p->ps_pid); TAILQ_REMOVE(&spc->spc_qs[queue], p, p_runq); if (TAILQ_EMPTY(&spc->spc_qs[queue])) { |