From: Andi Kleen <andi@firstfloor.org>
To: Venkatesh Pallipadi <venki@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org, Paul Turner <pjt@google.com>,
Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: Proper kernel irq time accounting -v3
Date: Thu, 30 Sep 2010 09:59:40 +0200 [thread overview]
Message-ID: <8762xnwtjn.fsf@basil.nowhere.org> (raw)
In-Reply-To: <1285788096-29471-1-git-send-email-venki@google.com> (Venkatesh Pallipadi's message of "Wed, 29 Sep 2010 12:21:29 -0700")
Venkatesh Pallipadi <venki@google.com> writes:
>
> Solution to (1) involves adding extra timing on irq entry/exit to
> get the fine granularity info and then exporting it to user.
This means RDTSC right?
I am a bit concerned about overhead on systems with high TSC overhead.
Is there a way to turn this off at runtime for those?
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2010-09-30 7:59 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-29 19:21 Venkatesh Pallipadi
2010-09-29 19:21 ` [PATCH 1/7] si time accounting accounts bh_disable'd time to si -v3 Venkatesh Pallipadi
2010-09-30 11:04 ` Peter Zijlstra
2010-09-30 16:26 ` Venkatesh Pallipadi
2010-10-01 23:16 ` Peter Zijlstra
2010-10-02 15:42 ` Venkatesh Pallipadi
2010-10-03 0:34 ` Peter Zijlstra
2010-10-04 16:54 ` Venkatesh Pallipadi
2010-09-29 19:21 ` [PATCH 2/7] Consolidate account_system_vtime extern declaration -v3 Venkatesh Pallipadi
2010-09-29 19:21 ` [PATCH 3/7] Add IRQ_TIME_ACCOUNTING, finer accounting of irq time -v3 Venkatesh Pallipadi
2010-09-30 11:06 ` Peter Zijlstra
2010-09-30 16:29 ` Venkatesh Pallipadi
2010-09-30 20:38 ` Venkatesh Pallipadi
2010-10-01 11:46 ` Peter Zijlstra
2010-10-01 16:51 ` Venkatesh Pallipadi
2010-10-01 17:29 ` Venkatesh Pallipadi
2010-10-01 23:14 ` Peter Zijlstra
2010-10-01 23:32 ` Venkatesh Pallipadi
2010-10-02 10:53 ` Peter Zijlstra
2010-10-02 15:26 ` Venkatesh Pallipadi
2010-10-03 0:26 ` Peter Zijlstra
2010-10-01 11:45 ` Peter Zijlstra
2010-09-29 19:21 ` [PATCH 4/7] x86: Add IRQ_TIME_ACCOUNTING in x86 -v3 Venkatesh Pallipadi
2010-09-29 19:21 ` [PATCH 5/7] sched: Do not account irq time to current task -v3 Venkatesh Pallipadi
2010-09-29 19:21 ` [PATCH 6/7] sched: Remove irq time from available CPU power -v3 Venkatesh Pallipadi
2010-09-29 19:21 ` [PATCH 7/7] Export per cpu hardirq and softirq time in proc -v3 Venkatesh Pallipadi
2010-09-30 7:59 ` Andi Kleen [this message]
2010-09-30 16:37 ` Proper kernel irq time accounting -v3 Venkatesh Pallipadi
2010-09-30 17:36 ` Andi Kleen
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