sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-24 15:23:42 +03:00
Code Issues Packages Projects Releases Wiki Activity

[profile] Allow interrupts to be excluded from profiling results

Browse Source 
Interrupt processing adds noise to profiling results.  Allow
interrupts (from within protected mode) to be profiled separately,
with time spent within the interrupt handler being excluded from any
other profiling currently in progress.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-05-04 11:45:11 +01:00
parent 69313edad8
commit 6f410a16d9
4 changed files with 120 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

103
src/include/ipxe/profile.h
View File

@@ -58,11 +58,65 @@ struct profiler {
#define __profiler
#endif
extern unsigned long profile_excluded;
extern void profile_update ( struct profiler *profiler, unsigned long sample );
extern unsigned long profile_mean ( struct profiler *profiler );
extern unsigned long profile_variance ( struct profiler *profiler );
extern unsigned long profile_stddev ( struct profiler *profiler );
/**
* Get start time
*
* @v profiler Profiler
* @ret started Start time
*/
static inline __attribute__ (( always_inline )) unsigned long
profile_started ( struct profiler *profiler ) {
/* If profiling is active then return start time */
if ( PROFILING ) {
return ( profiler->started + profile_excluded );
} else {
return 0;
}
}
/**
* Get stop time
*
* @v profiler Profiler
* @ret stopped Stop time
*/
static inline __attribute__ (( always_inline )) unsigned long
profile_stopped ( struct profiler *profiler ) {
/* If profiling is active then return start time */
if ( PROFILING ) {
return ( profiler->stopped + profile_excluded );
} else {
return 0;
}
}
/**
* Get elapsed time
*
* @v profiler Profiler
* @ret elapsed Elapsed time
*/
static inline __attribute__ (( always_inline )) unsigned long
profile_elapsed ( struct profiler *profiler ) {
/* If profiling is active then return elapsed time */
if ( PROFILING ) {
return ( profile_stopped ( profiler ) -
profile_started ( profiler ) );
} else {
return 0;
}
}
/**
* Start profiling
*
@@ -74,7 +128,23 @@ profile_start_at ( struct profiler *profiler, unsigned long started ) {
/* If profiling is active then record start timestamp */
if ( PROFILING )
profiler->started = started;
profiler->started = ( started - profile_excluded );
}
/**
* Stop profiling
*
* @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_excluded );
profile_update ( profiler, profile_elapsed ( profiler ) );
}
}
/**
@@ -91,23 +161,7 @@ profile_start ( struct profiler *profiler ) {
}
/**
* 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 ) );
}
}
/**
* Record profiling result
* Stop profiling
*
* @v profiler Profiler
*/
@@ -119,4 +173,17 @@ profile_stop ( struct profiler *profiler ) {
profile_stop_at ( profiler, profile_timestamp() );
}
/**
* Exclude time from other ongoing profiling results
*
* @v profiler Profiler
*/
static inline __attribute__ (( always_inline )) void
profile_exclude ( struct profiler *profiler ) {
/* If profiling is active then update accumulated excluded time */
if ( PROFILING )
profile_excluded += profile_elapsed ( profiler );
}
#endif /* _IPXE_PROFILE_H */