From: Peter Lieven <pl@kamp.de>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] Qemu and heavily increased RSS usage
Date: Thu, 23 Jun 2016 11:57:45 +0200 [thread overview]
Message-ID: <576BB299.80105@kamp.de> (raw)
In-Reply-To: <20160621131815.GB2264@work-vm>
Am 21.06.2016 um 15:18 schrieb Dr. David Alan Gilbert:
> * Peter Lieven (pl@kamp.de) wrote:
>> Hi,
>>
>> while upgrading from Qemu 2.2.0 to Qemu 2.5.1.1 I noticed that the RSS memory usage has heavily increased.
>> We use hugepages so the RSS memory does not include VM memory. In Qemu 2.2.0 it used to be ~30MB per vServer
>> and increased to up to 300 - 400MB for Qemu 2.5.1.1 (same with master). The memory increases over time, but seems
>> not to grow indefinetly. I tried to bisect, but had no result so far that made sense. I also tried valgrind / massif, but
>> valgrind does not see the allocation (at least at exit) and massif fails to rund due to - so it pretends - heap corruption.
>>
>> Any help or ideas how to debug further would be appreciated.
> I think I'd try stripping devices off; can you get a similar difference
> to happen with a guest with no USB, no hugepages, no VGA and a simple
> locally stored IDE disk?
From what I have debugged so far, it seems to be related to virtio-net. With that knowledge I will try to bisect again.
Peter
next prev parent reply other threads:[~2016-06-23 9:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-21 8:21 [Qemu-devel] Qemu and heavily increased RSS usage Peter Lieven
2016-06-21 13:18 ` Dr. David Alan Gilbert
2016-06-21 15:12 ` Peter Lieven
2016-06-22 10:56 ` Stefan Hajnoczi
2016-06-22 19:55 ` Peter Lieven
2016-06-22 20:56 ` Peter Maydell
2016-06-24 9:37 ` Stefan Hajnoczi
2016-06-24 9:53 ` Peter Lieven
2016-06-24 9:57 ` Dr. David Alan Gilbert
2016-06-24 9:58 ` Peter Maydell
2016-06-24 10:45 ` Peter Lieven
2016-06-27 12:39 ` Stefan Hajnoczi
2016-06-27 13:33 ` Peter Lieven
2016-06-23 9:57 ` Peter Lieven [this message]
2016-06-24 22:57 ` Michael S. Tsirkin
2016-06-23 14:58 ` Peter Lieven
2016-06-23 15:00 ` Dr. David Alan Gilbert
2016-06-23 15:02 ` Peter Lieven
2016-06-23 15:21 ` Paolo Bonzini
2016-06-23 15:31 ` Peter Lieven
2016-06-23 15:47 ` Paolo Bonzini
2016-06-23 16:19 ` Peter Lieven
2016-06-23 16:53 ` Paolo Bonzini
2016-06-23 21:28 ` Peter Lieven
2016-06-24 4:10 ` Paolo Bonzini
2016-06-24 8:11 ` Peter Lieven
2016-06-24 8:20 ` Paolo Bonzini
2016-06-24 8:45 ` Peter Lieven
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