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Make inline lockstat checks just inspect lockstat_enabled

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There is no correctness issue and this lets the kernel just test one typically
false variable.
This commit is contained in:
Mateusz Guzik 2017-02-17 14:05:57 +00:00
parent d98d230378
commit 57abbcd5ad
1 changed files with 11 additions and 8 deletions
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19
sys/sys/lockstat.h
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@ -107,6 +107,13 @@ extern int lockstat_enabled;
LOCKSTAT_RECORD1(probe, lp, a); \
} while (0)
#ifndef LOCK_PROFILING
#define LOCKSTAT_PROFILE_ENABLED(probe) __predict_false(lockstat_enabled)
#define LOCKSTAT_OOL_PROFILE_ENABLED(probe) LOCKSTAT_PROFILE_ENABLED(probe)
#else
#define LOCKSTAT_OOL_PROFILE_ENABLED(probe) 1
#endif
struct lock_object;
uint64_t lockstat_nsecs(struct lock_object *);
@ -130,16 +137,12 @@ uint64_t lockstat_nsecs(struct lock_object *);
#define LOCKSTAT_PROFILE_RELEASE_RWLOCK(probe, lp, a) \
LOCKSTAT_PROFILE_RELEASE_LOCK(probe, lp)
#endif /* !KDTRACE_HOOKS */
#ifndef LOCK_PROFILING
#define LOCKSTAT_PROFILE_ENABLED(probe) \
SDT_PROBE_ENABLED(lockstat, , , probe)
#define LOCKSTAT_OOL_PROFILE_ENABLED(probe) \
SDT_PROBE_ENABLED(lockstat, , , probe)
#else
#define LOCKSTAT_OOL_PROFILE_ENABLED(probe) 1
#define LOCKSTAT_PROFILE_ENABLED(probe) 0
#endif
#define LOCKSTAT_OOL_PROFILE_ENABLED(probe) 1
#endif /* !KDTRACE_HOOKS */
#endif /* _KERNEL */
#endif /* _SYS_LOCKSTAT_H */