From: Joel Schopp <jschopp@austin.ibm.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: ego@in.ibm.com, linux-kernel@vger.kernel.org,
Ingo Molnar <mingo@elte.hu>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCHv2 1/2] sched: enable ARCH_POWER
Date: Tue, 26 Jan 2010 17:28:06 -0600 [thread overview]
Message-ID: <1264548486.12239.55.camel@jschopp-laptop> (raw)
In-Reply-To: <1264017764.5717.127.camel@jschopp-laptop>
Enable the scheduler feature that allows use of arch_scale_smt_power. Stub out
the broken x86 implementation.
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
---
Index: linux-2.6.git/kernel/sched_features.h
===================================================================
--- linux-2.6.git.orig/kernel/sched_features.h
+++ linux-2.6.git/kernel/sched_features.h
@@ -102,7 +102,7 @@ SCHED_FEAT(CACHE_HOT_BUDDY, 1)
/*
* Use arch dependent cpu power functions
*/
-SCHED_FEAT(ARCH_POWER, 0)
+SCHED_FEAT(ARCH_POWER, 1)
SCHED_FEAT(HRTICK, 0)
SCHED_FEAT(DOUBLE_TICK, 0)
Index: linux-2.6.git/arch/x86/kernel/cpu/sched.c
===================================================================
--- linux-2.6.git.orig/arch/x86/kernel/cpu/sched.c
+++ linux-2.6.git/arch/x86/kernel/cpu/sched.c
@@ -44,11 +44,9 @@ unsigned long arch_scale_freq_power(stru
unsigned long arch_scale_smt_power(struct sched_domain *sd, int cpu)
{
/*
- * aperf/mperf already includes the smt gain
+ * aperf/mperf already includes the smt gain, but represents capacity
+ * as 0 when idle. So for now just return default.
*/
- if (boot_cpu_has(X86_FEATURE_APERFMPERF))
- return SCHED_LOAD_SCALE;
-
return default_scale_smt_power(sd, cpu);
}
next prev parent reply other threads:[~2010-01-26 23:28 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-20 20:00 [PATCH 0/2] sched: arch_scale_smt_powers Joel Schopp
2010-01-20 20:02 ` [PATCH 1/2] sched: Fix the place where group powers are updated Joel Schopp
2010-01-26 23:28 ` Joel Schopp [this message]
2010-01-28 23:20 ` [PATCHv3 1/2] sched: enable ARCH_POWER Joel Schopp
2010-02-05 20:57 ` [PATCHv4 " Joel Schopp
2010-01-20 20:04 ` [PATCH 2/2] powerpc: implement arch_scale_smt_power for Power7 Joel Schopp
2010-01-20 20:48 ` Peter Zijlstra
2010-01-20 21:58 ` Michael Neuling
2010-01-20 22:44 ` Joel Schopp
2010-01-21 8:27 ` Peter Zijlstra
2010-01-20 21:04 ` Michael Neuling
2010-01-20 22:09 ` Joel Schopp
2010-01-24 3:00 ` Benjamin Herrenschmidt
2010-01-25 17:50 ` Joel Schopp
2010-01-26 4:23 ` Benjamin Herrenschmidt
2010-01-20 21:33 ` Benjamin Herrenschmidt
2010-01-20 22:36 ` Joel Schopp
2010-01-26 23:28 ` [PATCHv2 " Joel Schopp
2010-01-27 0:52 ` Benjamin Herrenschmidt
2010-01-28 22:39 ` Joel Schopp
2010-01-29 1:23 ` Benjamin Herrenschmidt
2010-01-28 23:20 ` [PATCHv3 " Joel Schopp
2010-01-28 23:24 ` Joel Schopp
2010-01-29 1:23 ` Benjamin Herrenschmidt
2010-01-29 10:13 ` Peter Zijlstra
2010-01-29 18:34 ` Joel Schopp
2010-01-29 18:41 ` Joel Schopp
2010-02-05 20:57 ` [PATCHv4 " Joel Schopp
2010-02-14 10:12 ` Peter Zijlstra
2010-02-17 22:20 ` Michael Neuling
2010-02-18 13:17 ` Peter Zijlstra
2010-02-18 13:19 ` Peter Zijlstra
2010-02-18 16:28 ` Joel Schopp
2010-02-18 17:08 ` Peter Zijlstra
2010-02-19 6:05 ` Michael Neuling
2010-02-19 10:01 ` Peter Zijlstra
2010-02-19 11:01 ` Michael Neuling
2010-02-23 6:08 ` Michael Neuling
2010-02-23 16:24 ` Peter Zijlstra
2010-02-23 16:30 ` Peter Zijlstra
2010-02-24 6:07 ` Michael Neuling
2010-02-24 11:13 ` Michael Neuling
2010-02-24 11:58 ` Michael Neuling
2010-02-27 10:21 ` Michael Neuling
2010-03-02 14:44 ` Peter Zijlstra
2010-03-04 22:28 ` Michael Neuling
2010-01-29 12:25 ` [PATCHv3 " Gabriel Paubert
2010-01-29 16:26 ` Joel Schopp
2010-01-26 23:27 ` [PATCHv2 0/2] sched: arch_scale_smt_powers v2 Joel Schopp
2010-01-28 23:20 ` [PATCHv3 0/2] sched: arch_scale_smt_powers Joel Schopp
2010-02-05 20:57 ` [PATCHv4 " Joel Schopp
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