From: Manuel Selva <selva.manuel@gmail.com>
To: "linux-perf-users@vger.kernel.org" <linux-perf-users@vger.kernel.org>
Subject: What is the exact meaning of this parameter ?
Date: Wed, 27 May 2015 18:55:07 +0200 [thread overview]
Message-ID: <5565F6EB.3090406@gmail.com> (raw)
Hi all,
I know that the perf_event_mlock_kb kernel parameter allows to limit the
amount of counters sampling memory that can be mmap'ed by an unprivileged
user.
Nevertheless, playing with the size I give to mmap some memory using the
file descriptor returned by perf_event_open I am not able to linkk with the
perf_event_mlock_kb parameter. Looking into kernel sources, it seems this
parameter is used in kernel/events/core.c where the perf mmap operation is
defined but I am not sure to understand the code there. So my question is
what is the exact meaning of this parameter ?
--
Manu
next reply other threads:[~2015-05-27 16:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-27 16:55 Manuel Selva [this message]
2015-06-06 7:20 ` What is the exact meaning of this parameter ? Manuel Selva
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