From: Peter Zijlstra <peterz@infradead.org>
To: Tommaso Cucinotta <tommaso.cucinotta@sssup.it>
Cc: Luca Abeni <luca.abeni@unitn.it>,
Juri Lelli <juri.lelli@gmail.com>, Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, linux-dl@retis.sssup.it,
Juri Lelli <juri.lelli@arm.com>
Subject: Re: [RFC PATCH 3/4] Make deadline max-heap faster avoiding real swaps on heapify ops.
Date: Mon, 8 Aug 2016 16:04:51 +0200 [thread overview]
Message-ID: <20160808140451.GG6879@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1468921493-10054-4-git-send-email-tommaso.cucinotta@sssup.it>
On Tue, Jul 19, 2016 at 11:44:52AM +0200, Tommaso Cucinotta wrote:
> This change achieves up to 10% of speed-up for cpudl_set() calls, as
> measured with a andomly generated workload of 1K,10K,100K random heap
> insertions and deletions (75% cpudl_set() calls with is_valid=1 and
> 25% with is_valid=0), and randomly generated cpu IDs, with up to 256
> CPUs, as measured on an Intel Core2 Duo.
Changelog fails to explain _what_ the change is.
Some details on the change in implementation and why this is faster
would be good.
next prev parent reply other threads:[~2016-08-08 14:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-19 9:44 SCHED_DEADLINE cpudeadline.{h,c} fixup Tommaso Cucinotta
2016-07-19 9:44 ` [RFC PATCH 1/4] Minimally invasive deadline wrap-around bugfix for SCHED_DEADLINE cpu heap Tommaso Cucinotta
2016-08-01 11:43 ` Juri Lelli
2016-08-01 12:57 ` Juri Lelli
2016-08-10 18:00 ` [tip:sched/core] sched/deadline: Fix wrap-around in DL heap tip-bot for Tommaso Cucinotta
2016-07-19 9:44 ` [RFC PATCH 2/4] SCHED_DEADLINE cpu heap code clarification/refactory Tommaso Cucinotta
2016-08-01 16:30 ` Juri Lelli
2016-07-19 9:44 ` [RFC PATCH 3/4] Make deadline max-heap faster avoiding real swaps on heapify ops Tommaso Cucinotta
2016-08-02 11:38 ` Juri Lelli
2016-08-08 14:04 ` Peter Zijlstra [this message]
2016-07-19 9:44 ` [RFC PATCH 4/4] Split cpudl_set() into cpudl_set() and cpudl_clear() Tommaso Cucinotta
2016-08-02 11:52 ` Juri Lelli
-- strict thread matches above, loose matches on Subject: below --
2016-05-19 16:02 SCHED_DEADLINE cpudeadline.{h,c} fixup Tommaso Cucinotta
2016-05-19 16:02 ` [RFC PATCH 3/4] Make deadline max-heap faster avoiding real swaps on heapify ops Tommaso Cucinotta
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