From: "jistone at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sources.redhat.com
Subject: [Bug kprobes/10869] New: kretprobes waste a lot of memory on kretprobe_instances
Date: Thu, 29 Oct 2009 16:58:00 -0000 [thread overview]
Message-ID: <20091029165749.10869.jistone@redhat.com> (raw)
As noted in bug #10839 comment #3, using kmalloc for each individual
kretprobe_instance wastes a lot of kernel memory. In my measurement, each 40
byte kmalloc request actually reserves 136 bytes. Having a large number of
kretprobes with large maxactive values makes this waste add up quickly.
--
Summary: kretprobes waste a lot of memory on kretprobe_instances
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: kprobes
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: jistone at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=10869
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next reply other threads:[~2009-10-29 16:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-29 16:58 jistone at redhat dot com [this message]
2009-10-29 17:12 ` [Bug kprobes/10869] " leitao at linux dot vnet dot ibm dot com
2009-10-29 17:15 ` leitao at linux dot vnet dot ibm dot com
2009-10-29 17:27 ` jkenisto at us dot ibm dot com
2009-10-30 7:29 ` ananth at in dot ibm dot com
2009-10-30 12:43 ` Jim Keniston
2009-10-30 7:30 ` ananth at in dot ibm dot com
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