diff options
| author | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2015-09-23 09:31:32 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2015-09-23 12:46:16 -0700 |
| commit | 42d7f7e884fcce78301ca88da3434f0fcbf3fee5 (patch) | |
| tree | 11bacc4b8754c2015c85b2977762f242e18fbd34 /drivers/staging/greybus/loopback.c | |
| parent | f01f7a9851f9c75467373ba7797394dba91825da (diff) | |
greybus: loopback: masked out threads should sleep
If a thread is masked out it should not consume CPU cycles during a test.
We set an arbitrary 100 millisecond sleep time for each masked out thread.
Reasonably blunt instrument to ensure threads with nothing to do don't end
up thrashing the acquisition/release of mutexes.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Patrick Titiano <ptitiano@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/loopback.c')
| -rw-r--r-- | drivers/staging/greybus/loopback.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c index 3151876a717c..764ee83df082 100644 --- a/drivers/staging/greybus/loopback.c +++ b/drivers/staging/greybus/loopback.c @@ -693,8 +693,10 @@ static int gb_loopback_fn(void *data) break; mutex_lock(&gb_dev.mutex); - if (!gb_loopback_active(gb)) + if (!gb_loopback_active(gb)) { + ms_wait = 100; goto unlock_continue; + } if (gb_dev.iteration_max) { /* Determine overall lowest count */ low_count = gb->iteration_count; |