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From "haosdent (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MESOS-4705) Linux 'perf' parsing logic may fail when OS distribution has perf backports.
Date Thu, 26 Jan 2017 10:10:24 GMT

    [ https://issues.apache.org/jira/browse/MESOS-4705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15839508#comment-15839508
] 

haosdent commented on MESOS-4705:
---------------------------------

[~bmahler] It looks like have more fields in recent perf version.

https://github.com/torvalds/linux/blob/v4.9/tools/perf/util/stat-shadow.c#L528
https://github.com/torvalds/linux/blob/v4.9/tools/perf/builtin-stat.c#L1149

Should we create a new ticket for this since this is marked "resolved" ?

> Linux 'perf' parsing logic may fail when OS distribution has perf backports.
> ----------------------------------------------------------------------------
>
>                 Key: MESOS-4705
>                 URL: https://issues.apache.org/jira/browse/MESOS-4705
>             Project: Mesos
>          Issue Type: Bug
>          Components: cgroups, isolation
>    Affects Versions: 0.27.1
>            Reporter: Fan Du
>            Assignee: Fan Du
>             Fix For: 0.26.2, 0.27.3, 0.28.2, 1.0.0
>
>
> When sampling container with perf event on Centos7 with kernel 
> 3.10.0-123.el7.x86_64, slave complained with below error spew:
> {code}
> E0218 16:32:00.591181  8376 perf_event.cpp:408] Failed to get perf sample: Failed to
parse perf sample: Failed to parse perf sample line '25871993253,,cycles,mesos/5f23ffca-87ed-4ff6-84f2-6ec3d4098ab8,10059827422,100.00':
Unexpected number of fields
> {code}
> it's caused by the current perf format [assumption | https://git-wip-us.apache.org/repos/asf?p=mesos.git;a=blob;f=src/linux/perf.cpp;h=1c113a2b3f57877e132bbd65e01fb2f045132128;hb=HEAD#l430]
with kernel version below 3.12 
> On 3.10.0-123.el7.x86_64 kernel, the format is with 6 tokens as below:
> value,unit,event,cgroup,running,ratio
> A local modification fixed this error on my test bed, please review this ticket.



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