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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-07-15 20:42:20 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-07-27 06:55:03 +0000 |
| commit | 806ea08bb2868f44c5c2227dd2ace49dbe6af6a3 (patch) | |
| tree | e911f078ee58e5bbcd716a5281a74bae69defb1b /src/include | |
| parent | 01ea8f1fcc6e9e144de97e18afac3fb69676ba1c (diff) | |
timestamp: Apply factor to recorded stamps
If we dont have a constant TSC rate, timestamp table
has odd leaps and may appear to run backwards. Add
functionality to apply a factor such that all stamps
are in the same timebase.
Change-Id: Idab9c2c00e117c4d247db8cc9a2897640fa01edd
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/19330
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/timestamp.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/include/timestamp.h b/src/include/timestamp.h index d0735294df..95470f53d6 100644 --- a/src/include/timestamp.h +++ b/src/include/timestamp.h @@ -36,10 +36,15 @@ void timestamp_init(uint64_t base); void timestamp_add(enum timestamp_id id, uint64_t ts_time); /* Calls timestamp_add with current timestamp. */ void timestamp_add_now(enum timestamp_id id); + +/* Apply a factor of N/M to all timestamps recorded so far. */ +void timestamp_rescale_table(uint16_t N, uint16_t M); + #else #define timestamp_init(base) #define timestamp_add(id, time) #define timestamp_add_now(id) +#define timestamp_rescale_table(N, M) #endif /* Implemented by the architecture code */ |