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| author |   Dave Barach <dave@barachs.net> | 2019-12-01 08:59:03 -0500 |
|---|---|---|
| committer |   Andrew Yourtchenko <ayourtch@gmail.com> | 2020-02-06 12:30:08 +0000 |
| commit | 520c355b86fba01a65593c8c026373a36c87acc6 (patch) | |
| tree | 98b9020b0f30da9924f63d3f650fc28cadecd753 /src/tools/perftool/cpelstate.c | |
| parent | 5b2eea6e0705b7e8f8b77f0efe6535885717cbee (diff) | |
vppinfra: preserve total_cpu_time across clock freq adjustment
If clib_time_verify_frequency() adjusts the clock frequency, transform
total_cpu_time to the new time coordinate space. Otherwise, we break
comparisons with previous clib_time_now() value.
Without this correction, time jumps in one direction or the other
depending on the sign of the frequency change. Reasonably harmless in
most cases, but under perfect storm conditions the wheels fall off.
Type: fix
Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I21802c2630e2c87ff817cd732b7d78bc022cd2d7
(cherry picked from commit e52d8d880ac644f07154bc2fb94035a198ed6688)
Diffstat (limited to 'src/tools/perftool/cpelstate.c')
0 files changed, 0 insertions, 0 deletions