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Wed, 28 Aug 2019 17:27:07 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [Qemu-block] [PATCH v5 6/6] iotests: extend sleeping time under Valgrind X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "kwolf@redhat.com" , Denis Lunev , "mreitz@redhat.com" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 8/28/19 11:24 AM, Andrey Shinkevich wrote: > > > On 27/08/2019 22:42, John Snow wrote: >> >> >> On 8/23/19 11:27 AM, Vladimir Sementsov-Ogievskiy wrote: >>> 16.08.2019 4:01, John Snow wrote: >>>> >>>> >>>> On 7/19/19 12:30 PM, Andrey Shinkevich wrote: >>>>> To synchronize the time when QEMU is running longer under the Valgrind, >>>>> increase the sleeping time in the test 247. >>>>> >>>>> Signed-off-by: Andrey Shinkevich >>>>> Reviewed-by: Vladimir Sementsov-Ogievskiy >>>>> --- >>>>> tests/qemu-iotests/247 | 6 +++++- >>>>> 1 file changed, 5 insertions(+), 1 deletion(-) >>>>> >>>>> diff --git a/tests/qemu-iotests/247 b/tests/qemu-iotests/247 >>>>> index 546a794..c853b73 100755 >>>>> --- a/tests/qemu-iotests/247 >>>>> +++ b/tests/qemu-iotests/247 >>>>> @@ -57,7 +57,11 @@ TEST_IMG="$TEST_IMG.4" _make_test_img $size >>>>> {"execute":"block-commit", >>>>> "arguments":{"device":"format-4", "top-node": "format-2", "base-node":"format-0", "job-id":"job0"}} >>>>> EOF >>>>> -sleep 1 >>>>> +if [ "${VALGRIND_QEMU}" == "y" ]; then >>>>> + sleep 10 >>>>> +else >>>>> + sleep 1 >>>>> +fi >>>>> echo '{"execute":"quit"}' >>>>> ) | $QEMU -qmp stdio -nographic -nodefaults \ >>>>> -blockdev file,node-name=file-0,filename=$TEST_IMG.0,auto-read-only=on \ >>>>> >>>> >>>> This makes me nervous, though. Won't this race terribly? (Wait, why >>>> doesn't it race already?) >>>> >>> >>> Hmm, however it works somehow. I'm afraid that everything with "sleep" is definitely racy.. >>> Or what do you mean? >>> >> >> Right -- anything with a sleep is already at risk for racing. >> >> What I am picking up on here is that with valgrind, there is an even >> greater computational overhead that's much harder to predict, so I was >> wondering how these values were determined. >> > > I just followed the trend and extended the sleeping time with a grater > tolerance so that the test could pass on systems where the 'sleep 1' > command helps to pass without Valgrind. We could rewrite the test 247 in > Python in a separate series, shall we? > If you have the time, but I don't think anyone will require it for this series. Just reviewing "out loud." I'll look at V6 soon. --js