linux-kernel - perf: odd event scheduling issue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.11.1505192304090.4429@vincent-weaver-1.umelst.maine.edu>
Date:	Tue, 19 May 2015 23:07:09 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	LKML <linux-kernel@...r.kernel.org>
cc:	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>
Subject: perf: odd event scheduling issue

Hello

so I'm running 4.1-rc4 on my Haswell machine and a lot of my perf_event 
testsuite is failing.  There seems to be weird event scheduling issues.

I can reproduce it with plain perf; simple event groups that should work 
fine can't be scheduled.

vince@...well:~$ perf stat -e \{cycles,instructions\} sleep 1

 Performance counter stats for 'sleep 1':

     <not counted>      cycles                   
     <not counted>      instructions             

       1.003414661 seconds time elapsed

I just wanted to check to see if this was a known problem before I started 
bisecting.  I was also possibly seeing this with 4.1-rc2.

Vince
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/