diff options
author | Konsta Holtta <kholtta@nvidia.com> | 2017-06-15 03:58:32 -0400 |
---|---|---|
committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2017-06-19 11:35:04 -0400 |
commit | 571c7c2fb37176671d55f004df4ed1055f7e8cb1 (patch) | |
tree | ea249cf7e46a86bb5b70f6478886b8b45ccc6e01 /drivers/gpu/nvgpu/common/linux | |
parent | d84d7f8694562628e1ab41fd09d08b68f59e0b30 (diff) |
gpu: nvgpu: add a simple time API
Add nvgpu_current_time_ms() to return a time from a monotonic clock
source in milliseconds. The start time is unspecified; this API is meant
to be used for duration measurements.
Jira NVGPU-83
Change-Id: I135c8ee88283149422a68d5fa859241eebbd6459
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1503001
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/common/linux')
-rw-r--r-- | drivers/gpu/nvgpu/common/linux/timers.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/common/linux/timers.c b/drivers/gpu/nvgpu/common/linux/timers.c index efd04557..140ae80e 100644 --- a/drivers/gpu/nvgpu/common/linux/timers.c +++ b/drivers/gpu/nvgpu/common/linux/timers.c | |||
@@ -229,3 +229,15 @@ void nvgpu_msleep(unsigned int msecs) | |||
229 | { | 229 | { |
230 | msleep(msecs); | 230 | msleep(msecs); |
231 | } | 231 | } |
232 | |||
233 | /** | ||
234 | * nvgpu_current_time_ms - Time in milliseconds from a monotonic clock. | ||
235 | * | ||
236 | * Return a clock in millisecond units. The start time of the clock is | ||
237 | * unspecified; the time returned can be compared with older ones to measure | ||
238 | * durations. The source clock does not jump when the system clock is adjusted. | ||
239 | */ | ||
240 | s64 nvgpu_current_time_ms(void) | ||
241 | { | ||
242 | return ktime_to_ms(ktime_get()); | ||
243 | } | ||