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Add the vtime (virtual time) hooks for DTrace.

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This commit is contained in:
John Birrell 2008-05-25 01:44:58 +00:00
parent ba3042115f
commit 6f5f25e521
2 changed files with 35 additions and 0 deletions
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17
sys/kern/sched_4bsd.c
View File

@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include "opt_hwpmc_hooks.h"
#include "opt_sched.h"
#include "opt_kdtrace.h"
#include <sys/param.h>
#include <sys/systm.h>
@ -61,6 +62,12 @@ __FBSDID("$FreeBSD$");
#include <sys/pmckern.h>
#endif
#ifdef KDTRACE_HOOKS
#include <sys/dtrace_bsd.h>
int dtrace_vtime_active;
dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
#endif
/*
* INVERSE_ESTCPU_WEIGHT is only suitable for statclock() frequencies in
* the range 100-256 Hz (approximately).
@ -962,6 +969,16 @@ sched_switch(struct thread *td, struct thread *newtd, int flags)
#endif
/* I feel sleepy */
lock_profile_release_lock(&sched_lock.lock_object);
#ifdef KDTRACE_HOOKS
/*
* If DTrace has set the active vtime enum to anything
* other than INACTIVE (0), then it should have set the
* function to call.
*/
if (dtrace_vtime_active)
(*dtrace_vtime_switch_func)(newtd);
#endif
cpu_switch(td, newtd, td->td_lock);
lock_profile_obtain_lock_success(&sched_lock.lock_object,
0, 0, __FILE__, __LINE__);

18
sys/kern/sched_ule.c
View File

@ -39,6 +39,7 @@
__FBSDID("$FreeBSD$");
#include "opt_hwpmc_hooks.h"
#include "opt_kdtrace.h"
#include "opt_sched.h"
#include <sys/param.h>
@ -69,6 +70,12 @@ __FBSDID("$FreeBSD$");
#include <sys/pmckern.h>
#endif
#ifdef KDTRACE_HOOKS
#include <sys/dtrace_bsd.h>
int dtrace_vtime_active;
dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
#endif
#include <machine/cpu.h>
#include <machine/smp.h>
@ -1823,6 +1830,17 @@ sched_switch(struct thread *td, struct thread *newtd, int flags)
#endif
lock_profile_release_lock(&TDQ_LOCKPTR(tdq)->lock_object);
TDQ_LOCKPTR(tdq)->mtx_lock = (uintptr_t)newtd;
#ifdef KDTRACE_HOOKS
/*
* If DTrace has set the active vtime enum to anything
* other than INACTIVE (0), then it should have set the
* function to call.
*/
if (dtrace_vtime_active)
(*dtrace_vtime_switch_func)(newtd);
#endif
cpu_switch(td, newtd, mtx);
/*
* We may return from cpu_switch on a different cpu. However,