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| author | Thomas Fleury <tfleury@nvidia.com> | 2017-04-27 14:28:27 -0400 |
|---|---|---|
| committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2017-06-15 14:53:10 -0400 |
| commit | 741e5c45179db066ddf5bed0be6f36e4d0d4010e (patch) | |
| tree | 815f83070ae0fcf37a7b234caf8a2f86997f99bb /drivers/gpu/nvgpu/lpwr/lpwr.h | |
| parent | 77e2cbab237637f71367df25384164b8c936a31a (diff) | |
gpu: nvgpu: hal for timestamps correlation
In order to perform timestamps correlation for FECS
traces, we need to collect GPU / GPU timestamps
samples. In virtualization case, it is possible for
a guest to get GPU timestamps by using read_ptimer.
However, if the CPU timestamp is read on guest side,
and the GPU timestamp is read on vm-server side,
then it introduces some latency that will create an
artificial offset for GPU timestamps (~2 us in
average). For better CPU / GPU timestamps correlation,
Added a command to collect all timestamps on vm-server
side.
Bug 1900475
Change-Id: Idfdc6ae4c16c501dc5e00053a5b75932c55148d6
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: http://git-master/r/1472447
(cherry picked from commit 56f56b5cd9d2e75cf7d2613b5e115bfebdbee0ce)
Reviewed-on: http://git-master/r/1489183
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/lpwr/lpwr.h')
0 files changed, 0 insertions, 0 deletions