lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 25 Jan 2017 16:33:01 +0100
From:   Peter Zijlstra <>
Subject: Re: [PATCH 2/2] perf,core: use parent avg sample period as child
 initial period

On Wed, Jan 18, 2017 at 08:21:02AM -0500, wrote:
> From: Kan Liang <>
> perf brings additional overhead when monitoring the task which
> frequently generates child task.
> When inheriting a event from parent task to child task, the
> sample_period of original parent event (parent_event->parent) will be
> assigned to child event as its initial period, which is usually the
> default sample_period 1.

Why is that mostly 1? I would expect the parent event's sample_period to
ramp up as well.

Powered by blists - more mailing lists