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| author | Michael Brown <mcb30@ipxe.org> | 2024-09-24 14:49:32 +0100 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2024-09-24 15:40:45 +0100 |
| commit | 5f7c6bd95bd6089473db3ba4f033584f5de0ee8a (patch) | |
| tree | 9b58e51eb17191f26cf24a7af33523ed16b9faa7 /src/include | |
| parent | 3def13265d9475c861eed1a101584b761e97ae33 (diff) | |
| download | ipxe-5f7c6bd95bd6089473db3ba4f033584f5de0ee8a.tar.gz | |
[profile] Standardise return type of profile_timestamp()
All consumers of profile_timestamp() currently treat the value as an
unsigned long. Only the elapsed number of ticks is ever relevant: the
absolute value of the timestamp is not used. Profiling is used to
measure short durations that are generally fewer than a million CPU
cycles, for which an unsigned long is easily large enough.
Standardise the return type of profile_timestamp() as unsigned long
across all CPU architectures. This allows 32-bit architectures such
as i386 and riscv32 to omit all logic associated with retrieving the
upper 32 bits of the 64-bit hardware counter, which simplifies the
code and allows riscv32 and riscv64 to share the same implementation.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/profile.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/include/ipxe/profile.h b/src/include/ipxe/profile.h index 2c69e1208..fd45b3cdc 100644 --- a/src/include/ipxe/profile.h +++ b/src/include/ipxe/profile.h @@ -60,6 +60,8 @@ struct profiler { #define __profiler #endif +unsigned long profile_timestamp ( void ); + extern unsigned long profile_excluded; extern void profile_update ( struct profiler *profiler, unsigned long sample ); |