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[profile] Add generic profiling infrastructure

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-04-23 17:43:18 +01:00
parent d36e814b8a
commit e5f6a9be38
10 changed files with 591 additions and 76 deletions
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29
src/arch/x86_64/include/bits/profile.h Normal file
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#ifndef _BITS_PROFILE_H
#define _BITS_PROFILE_H
/** @file
*
* Profiling
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
/**
* Get profiling timestamp
*
* @ret timestamp Timestamp
*/
static inline __attribute__ (( always_inline )) uint64_t
profile_timestamp ( void ) {
uint32_t eax;
uint32_t edx;
/* Read timestamp counter */
__asm__ __volatile__ ( "rdtsc" : "=a" ( eax ), "=d" ( edx ) );
return ( ( ( ( uint64_t ) edx ) << 32 ) | eax );
}
#endif /* _BITS_PROFILE_H */