From: Rick Jones <rick.jones2@hp.com>
To: linux-perf-users@vger.kernel.org
Subject: Memory leak in 3.17.rc6.g09bba1?
Date: Thu, 13 Nov 2014 17:28:15 -0800 [thread overview]
Message-ID: <54655AAF.90604@hp.com> (raw)
I am running a command:
perf top -a -g -e skb:kfree_skb
on a laptop running a 3.18.0-rc2+ kernel from davem's net-next tree.
While that is running I hit the system as the target of a netperf TCP_CC
test (ie netserver is running on the system where perf is running, and
netperf is run on another system, pointing at the first). I then expand
the kfree_skb() line and the sk_stream_kill_queues and
tcp_rcv_state_process lines "within" that expansion.
If I watch with plain "top" in another window I can see the RES value
for the perf process steadily increasing and also its CPU utlization.
The latter finally peaks at 100% (this is a core 2 duo laptop).
After about 1800 seconds of being the target of a netperf TCP_CC test
the RES value for the perf utility is over 1G.
If I wait long enough, perf will finally segfault.
Is this a known issue? If I should file a more formal bug report
somewhere let me know.
happy benchmarking,
rick jones
raj@raj-8510w:~$ net-next/tools/perf/perf --version
perf version 3.17.rc6.g09bba1
netperf -t tcp_cc -H <perfsystem> -l 3600
might need to repeat it a few times to get the segfault?
next reply other threads:[~2014-11-14 1:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-14 1:28 Rick Jones [this message]
2014-11-14 12:30 ` Memory leak in 3.17.rc6.g09bba1? Arnaldo Carvalho de Melo
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