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Wrap g_trace() into a macro to avoid unneeded calls.

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In most cases with debug disabled this function does nothing, but argument
passing and the call still cost measurable time due to cache misses, etc.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2019-12-05 04:52:19 +00:00
parent fcfe2d6633
commit 2efaef42e4
2 changed files with 7 additions and 3 deletions
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8
sys/geom/geom.h
View File

@ -255,11 +255,15 @@ void g_dev_physpath_changed(void);
struct g_provider *g_dev_getprovider(struct cdev *dev);
/* geom_dump.c */
void g_trace(int level, const char *, ...);
void (g_trace)(int level, const char *, ...) __printflike(2, 3);
# define G_T_TOPOLOGY 1
# define G_T_BIO 2
# define G_T_ACCESS 4
extern int g_debugflags;
#define g_trace(level, fmt, ...) do { \
if (__predict_false(g_debugflags & (level))) \
(g_trace)(level, fmt, ## __VA_ARGS__); \
} while (0)
/* geom_event.c */
typedef void g_event_t(void *, int flag);

2
sys/geom/geom_dump.c
View File

@ -319,7 +319,7 @@ g_confxml(void *p, int flag)
}
void
g_trace(int level, const char *fmt, ...)
(g_trace)(int level, const char *fmt, ...)
{
va_list ap;