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[profile] Provide methods for profiling individual stages of operations

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-05-03 18:25:19 +01:00
parent bcfaf119a7
commit a0da06c306
2 changed files with 42 additions and 12 deletions
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44
src/include/ipxe/profile.h
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@@ -9,7 +9,6 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <bits/profile.h>
#include <ipxe/tables.h>
@@ -26,7 +25,9 @@ struct profiler {
/** Name */
const char *name;
/** Start timestamp */
uint64_t started;
unsigned long started;
/** Stop timestamp */
unsigned long stopped;
/** Number of samples */
unsigned int count;
/** Mean sample value (scaled) */
@@ -62,6 +63,20 @@ extern unsigned long profile_mean ( struct profiler *profiler );
extern unsigned long profile_variance ( struct profiler *profiler );
extern unsigned long profile_stddev ( struct profiler *profiler );
/**
* Start profiling
*
* @v profiler Profiler
* @v started Start timestamp
*/
static inline __attribute__ (( always_inline )) void
profile_start_at ( struct profiler *profiler, unsigned long started ) {
/* If profiling is active then record start timestamp */
if ( PROFILING )
profiler->started = started;
}
/**
* Start profiling
*
@@ -72,7 +87,23 @@ profile_start ( struct profiler *profiler ) {
/* If profiling is active then record start timestamp */
if ( PROFILING )
profiler->started = profile_timestamp();
profile_start_at ( profiler, profile_timestamp() );
}
/**
* Record profiling result
*
* @v profiler Profiler
* @v stopped Stop timestamp
*/
static inline __attribute__ (( always_inline )) void
profile_stop_at ( struct profiler *profiler, unsigned long stopped ) {
/* If profiling is active then record end timestamp and update stats */
if ( PROFILING ) {
profiler->stopped = stopped;
profile_update ( profiler, ( stopped - profiler->started ) );
}
}
/**
@@ -82,13 +113,10 @@ profile_start ( struct profiler *profiler ) {
*/
static inline __attribute__ (( always_inline )) void
profile_stop ( struct profiler *profiler ) {
uint64_t ended;
/* If profiling is active then record end timestamp and update stats */
if ( PROFILING ) {
ended = profile_timestamp();
profile_update ( profiler, ( ended - profiler->started ) );
}
if ( PROFILING )
profile_stop_at ( profiler, profile_timestamp() );
}
#endif /* _IPXE_PROFILE_H */