On 07/03/2012 05:59 PM, Kang Kai wrote:
> Case pthread_cond_signal/1-1 fails on routerstation. The OS is Yocto
> linux 1.2 with kernel 3.0.24, and c library is eglibc 2.15.
>
> The fail log:
> [Thread 0x0x2c56d4b0] started and locked the mutex
> [Thread 0x0x2c56d4b0] is waiting for the cond
> [Thread 0x0x2bd6d4b0] started and locked the mutex
> [Thread 0x0x2bd6d4b0] is waiting for the cond
> [Thread 0x0x2b56d4b0] started and locked the mutex
> [Thread 0x0x2b56d4b0] is waiting for the cond
> [Main thread] signals a condition
> [Thread 0x0x2c56d4b0] was wakened and acquired the mutex again
> [Thread 0x0x2c56d4b0] released the mutex
> [Main thread] 1 waiters were wakened
> [Main thread] signals to wake up the next thread
> [Thread 0x0x2bd6d4b0] was wakened and acquired the mutex again
> [Thread 0x0x2bd6d4b0] released the mutex
> [Main thread] signals to wake up the next thread
> [Main thread] signals to wake up the next thread
> [Main thread] signals to wake up the next thread
> [Main thread] signals to wake up the next thread
> [Main thread] signals to wake up the next thread
> [Thread 0x0x2b56d4b0] was wakened and acquired the mutex again
> [Main thread] had to signal the condition 7 times
> [Main thread] to wake up 3 threads
> . Test FAILED.
>
> The main thread call pthread_cond_signal try to signal the child threads
> those are waiting on the condition, then call usleep(100) to relinquish
> the cpu. But 100 useconds is not enough and the main thread continue to
> run. So the case fails.
>
> Increase the sleep timeto 1000 useconds to make the case pass.
>
> Signed-off-by: Kang Kai <[email protected]>
> ---
> .../interfaces/pthread_cond_signal/1-1.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git
> a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c
>
> b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c
> index bf55b31..910931d 100644
> ---
> a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c
> +++
> b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c
> @@ -142,7 +142,7 @@ int main()
> fprintf(stderr,"Main failed to signal the condition\n");
> exit(PTS_UNRESOLVED);
> }
> - usleep(100);
> + usleep(1000);
Anyway, just add the hard sleep time can resolve nothing.
Maybe you can find a better way.
Thanks,
Wanlong Gao
> }
>
> if (i >= THREAD_NUM) {
> @@ -160,4 +160,4 @@ int main()
> }
> printf("Test PASSED\n");
> return PTS_PASS;
> -}
> \ No newline at end of file
> +}
>
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