Thanks for libumem hint (never heard about it, hm), seems there is a
port on FreeBSD, hopefully with a heap checker.
(I've tried tcmalloc before, but it comes with a no heap-check feature
on FreeBSD :(
Will definitely try libumem.
Will also try to find something related to ring buffer... I believe it
should be huge in my case.
Thanks!
On 04/17/18 23:34, Bryan Cantrill wrote:
So, you're probably being burned by the fact that the process is being
frequently stopped by DTrace to determine the ustack values. If you
only need the last n, consider using a ring buffer (which won't stop
the process until the DTrace enabling is terminated). Also, if it's a
memory leak that you're trying to track down, strongly consider using
libumem and ::findleaks instead -- it should take you right to the
leak! (See umem_debug(3MALLOC) for details.)
- Bryan
On Tue, Apr 17, 2018 at 11:27 PM, Robert <robert.ayrapet...@gmail.com
<mailto:robert.ayrapet...@gmail.com>> wrote:
Hi there!
Hope this wonderful community is still alive.
So, I have a "leaking" process:
sudo timeout 10 dtrace -n 'pid$target::malloc:entry { @ = count();
}' -p 24063
dtrace: description 'pid$target::malloc:entry ' matched 1 probe
1474858
Around 150K malloc-s per sec. And it leaks somewhere (under a
certain load only).
What I'm trying to do is to store all malloc\free calls
params\results along with stack traces.
Then I would analyze collected logs and find a leaking spot (I
really hope so).
Everything works fine, except ustack() calls - they are incredibly
slow and kill the performance almost right away.
Process's CPU usage drops down to zero and I can see how log file
is growing with about one record per second (instead of 150K\sec).
Is there some workaround to make ustack() calls to work in
real-time? Or maybe I've screwed up something...
Please help! Thanks!
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