From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Galbraith Subject: Re: [RFC][PATCH 0/3] update to cpupri algorithm Date: Sat, 30 Jul 2011 10:16:36 +0200 Message-ID: <1312013796.8752.63.camel@marge.simson.net> References: <20110729151340.419467771@goodmis.org> <1311963874.2314.15.camel@marge.simson.net> <1312009931.8752.53.camel@marge.simson.net> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Peter Zijlstra , RT To: Steven Rostedt Return-path: Received: from mailout-de.gmx.net ([213.165.64.23]:39548 "HELO mailout-de.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750875Ab1G3IQl (ORCPT ); Sat, 30 Jul 2011 04:16:41 -0400 In-Reply-To: <1312009931.8752.53.camel@marge.simson.net> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Sat, 2011-07-30 at 09:12 +0200, Mike Galbraith wrote: > y profile looks much better, but jitter proggy using posix-timers on 56 > cores warms up a spot you know all about. Lucky me, I know where fixes > for that bugger live. JiitterChasing::TheEnd() doesn't exist does it? Aw poo. 30999 0.05% [k] lock_timer 31000 | 31001 --- do_schedule_next_timer 31002 dequeue_signal 31003 | 31004 |--87.94%-- sys_rt_sigtimedwait 31005 | system_call_fastpath 31006 | | 31007 | |--20.24%-- 0x7f0935011f27 31008 | | do_sigwait # dso: [kernel.kallsyms] # Events: 118K cycles # # Overhead Symbol # ........ ................................... # 22.82% [k] _raw_spin_lock_irqsave | |--32.46%-- rt_mutex_trylock | tty_write_lock | tty_write | vfs_write | sys_write | system_call_fastpath | | | |--4.38%-- 0x7f46672a30f0 | | __GI___libc_write ... | |--32.20%-- rt_mutex_slowlock | tty_write_lock | tty_write | vfs_write | sys_write | system_call_fastpath | | | |--4.71%-- 0x7f46672a30f0 | | __GI___libc_write ... |--25.36%-- rcu_sched_qs | __schedule | | | |--52.52%-- preempt_schedule | | try_to_wake_up | | signal_wake_up | | send_sigqueue | | posix_timer_event | | posix_timer_fn | | run_hrtimer_softirq | | run_ksoftirqd | | kthread | | kernel_thread_helper | | | --47.48%-- schedule | rt_spin_lock_slowlock | lock_timer | do_schedule_next_timer | dequeue_signal | | | |--63.61%-- sys_rt_sigtimedwait | | system_call_fastpath | | | | | |--9.26%-- 0x7f3c840acf27 | | | do_sigwait ... | | | do_sigwait | | --5.58%-- [...] | | | --36.39%-- get_signal_to_deliver | do_signal | do_notify_resume | int_signal | | | |--6.17%-- 0x7f1dd90610f0 | | __GI___libc_write ... | |--6.54%-- rt_mutex_slowunlock | tty_write_unlock | tty_write | vfs_write | sys_write | system_call_fastpath | | | |--6.06%-- 0x7f11267610f0 | | __GI___libc_write