From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH]: arm64: factor work_pending state machine to C
Date: Mon, 11 Jul 2016 12:42:37 +0100 [thread overview]
Message-ID: <20160711114237.GE17735@arm.com> (raw)
In-Reply-To: <20160708154901.GF6493@arm.com>
On Fri, Jul 08, 2016 at 04:49:01PM +0100, Will Deacon wrote:
> On Fri, Jul 08, 2016 at 11:43:50AM -0400, Chris Metcalf wrote:
> > I am hopeful that this patch [1] can be picked up for the 4.8 merge window
> > in the arm64 tree. As I mentioned in my last patch series that included
> > this patch [2], I'm hopeful that this version addresses the performance
> > issues that were seen with Mark's original patch. This version tests the
> > TIF flags prior to calling out to the loop in C code.
>
> I still need to get round to measuring that again. This might also
> conflict with a late fix I just sent for 4.7.
FWIW, I've failed to measure any performance overhead from this change,
so it certainly looks better thsn Mark's original patch from that angle.
Will
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will.deacon@arm.com>
To: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH]: arm64: factor work_pending state machine to C
Date: Mon, 11 Jul 2016 12:42:37 +0100 [thread overview]
Message-ID: <20160711114237.GE17735@arm.com> (raw)
In-Reply-To: <20160708154901.GF6493@arm.com>
On Fri, Jul 08, 2016 at 04:49:01PM +0100, Will Deacon wrote:
> On Fri, Jul 08, 2016 at 11:43:50AM -0400, Chris Metcalf wrote:
> > I am hopeful that this patch [1] can be picked up for the 4.8 merge window
> > in the arm64 tree. As I mentioned in my last patch series that included
> > this patch [2], I'm hopeful that this version addresses the performance
> > issues that were seen with Mark's original patch. This version tests the
> > TIF flags prior to calling out to the loop in C code.
>
> I still need to get round to measuring that again. This might also
> conflict with a late fix I just sent for 4.7.
FWIW, I've failed to measure any performance overhead from this change,
so it certainly looks better thsn Mark's original patch from that angle.
Will
next prev parent reply other threads:[~2016-07-11 11:42 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 17:38 [PATCH v12 00/13] support "task_isolation" mode Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 01/13] vmstat: add quiet_vmstat_sync function Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 02/13] vmstat: add vmstat_idle function Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 03/13] lru_add_drain_all: factor out lru_add_drain_needed Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 04/13] task_isolation: add initial support Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
2016-05-18 13:34 ` Peter Zijlstra
2016-05-18 13:34 ` Peter Zijlstra
2016-05-18 16:34 ` Chris Metcalf
2016-05-18 16:34 ` Chris Metcalf
2016-05-18 17:09 ` Peter Zijlstra
2016-05-18 17:09 ` Peter Zijlstra
2016-04-05 17:38 ` [PATCH v12 05/13] task_isolation: support CONFIG_TASK_ISOLATION_ALL Chris Metcalf
2016-05-18 13:35 ` Peter Zijlstra
2016-05-18 16:34 ` Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 06/13] task_isolation: support PR_TASK_ISOLATION_STRICT mode Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
[not found] ` <1459877922-15512-7-git-send-email-cmetcalf-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2016-05-18 13:44 ` Peter Zijlstra
2016-05-18 13:44 ` Peter Zijlstra
2016-05-18 16:34 ` Chris Metcalf
2016-05-18 16:34 ` Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 07/13] task_isolation: add debug boot flag Chris Metcalf
2016-05-18 13:56 ` Peter Zijlstra
2016-05-18 16:36 ` Chris Metcalf
[not found] ` <684587d7-3653-7570-215f-37d3e9e786bc@mellanox.com>
2016-05-18 17:06 ` Peter Zijlstra
2016-05-19 15:12 ` Chris Metcalf
[not found] ` <b22cf841-9555-fff3-435b-646c4fd95bdc@mellanox.com>
2016-05-19 17:54 ` Peter Zijlstra
2016-05-19 18:05 ` Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 08/13] task_isolation: add PR_TASK_ISOLATION_ONE_SHOT flag Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 09/13] arm, tile: turn off timer tick for oneshot_stopped state Chris Metcalf
2016-04-07 16:58 ` Daniel Lezcano
2016-04-05 17:38 ` [PATCH v12 10/13] arch/x86: enable task isolation functionality Chris Metcalf
2016-05-18 16:23 ` Peter Zijlstra
2016-05-18 16:35 ` Chris Metcalf
2016-05-18 17:10 ` Peter Zijlstra
2016-04-05 17:38 ` [PATCH v12 11/13] arch/tile: " Chris Metcalf
2016-04-05 17:38 ` [PATCH v12 12/13] arm64: factor work_pending state machine to C Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
2016-07-08 15:43 ` [PATCH]: " Chris Metcalf
2016-07-08 15:43 ` Chris Metcalf
2016-07-08 15:49 ` Will Deacon
2016-07-08 15:49 ` Will Deacon
2016-07-08 16:11 ` Chris Metcalf
2016-07-08 16:11 ` Chris Metcalf
2016-07-11 11:42 ` Will Deacon [this message]
2016-07-11 11:42 ` Will Deacon
2016-07-11 12:19 ` Mark Rutland
2016-07-11 12:19 ` Mark Rutland
2016-07-29 18:16 ` Chris Metcalf
2016-07-29 18:16 ` Chris Metcalf
2016-08-09 10:21 ` Will Deacon
2016-08-09 10:21 ` Will Deacon
2016-04-05 17:38 ` [PATCH v12 13/13] arch/arm64: enable task isolation functionality Chris Metcalf
2016-04-05 17:38 ` Chris Metcalf
2016-05-12 18:26 ` [PATCH v12 00/13] support "task_isolation" mode Chris Metcalf
2016-05-12 18:26 ` Chris Metcalf
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