On 15 November 2012 06:52, Michael Hudson-Doyle <[email protected]>wrote:
> YongQin Liu <[email protected]> writes: > > > Hi, Andy & Michael > > > > > > About the problem that the telnet process consumes > > CPU(bug1034218<https://bugs.launchpad.net/linaro-android/+bug/1034218> > > ), > > For now I tried two ways to verify it: > > 1. Run the CTS test via submitting a lava-job > > In this way, the process that consumes CPU is telnet > > 2. Run the CTS test via command line "lava-android-test run cts" > > In this way, there is no process that consumes CPU to 100%, > > In the meanwhile, I also opened the telnet session. > > > > So I guess the problem is the way we calling the telnet command in > > lava-dispatcher. > > From my investigation, it's the select syscall in telnet that consumes > CPU, > > So I doubt if there is some place in lava-dispatcher that reads the ouput > > of telnet in a loop without sleep in the loop. > > but I did not find such place in lava-dispatcher. > > > > How do you think about it? > > This is all fairly strange. However, it seems like this is not the > problem we had running CTS before; IIRC then it was java processes > causing trouble on control. As the load from telnet is pure CPU load > (i.e. it doesn't consume masses of RAM or do loads of IO) I would be in > favour of enabling CTS again (carefully) and watching the graphs on > > http://munin.validation.linaro.org/validation.linaro.org/control.validation.linaro.org/index.html Okay. I will go ahead and enable it for the builds which have hardware acceleration support: https://android-build.linaro.org/builds/~linaro-android/panda-jb-gcc47-tilt-stable-blob/ https://android-build.linaro.org/builds/~linaro-android/snowball-jb-gcc47-igloo-stable-blob/<https://android-build.linaro.org/builds/~linaro-android/snowball-jb-gcc47-igloo-stable-blob/#> https://android-build.linaro.org/builds/~linaro-android/origen-jb-gcc47-samsunglt-tracking-blob/<https://android-build.linaro.org/builds/~linaro-android/origen-jb-gcc47-samsunglt-tracking-blob/#> > > Cheers, > mwh >
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