From: Tim Blechmann <tim@klingt.org>
To: linux-kernel@vger.kernel.org
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Subject: [PATCH] branch profiling on my nehalem machine showed 99% incorrect branch hints:
Date: Mon, 30 Nov 2009 18:59:34 +0100 [thread overview]
Message-ID: <4B140806.9000308@klingt.org> (raw)
In-Reply-To: <84144f020911300944x89309c5r8e9079e1a62fb416@mail.gmail.com>
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i have regenerated the patch for tip/tip ...
--
28459 7678524 99 __cache_alloc_node slab.c 3551
Discussion on lkml [1] led to the solution to remove this hint.
[1] http://patchwork.kernel.org/patch/63517/
Signed-off-by: Tim Blechmann <tim@klingt.org>
---
mm/slab.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/mm/slab.c b/mm/slab.c
index 7dfa481..0d4b731 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3306,7 +3306,7 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
cache_alloc_debugcheck_before(cachep, flags);
local_irq_save(save_flags);
- if (unlikely(nodeid == -1))
+ if (nodeid == -1)
nodeid = numa_node_id();
if (unlikely(!cachep->nodelists[nodeid])) {
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next prev parent reply other threads:[~2009-11-30 17:59 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1259059549.git.tim@klingt.org>
2009-11-24 10:55 ` [PATCH 1/5] process_64: remove branch hint Tim Blechmann
2009-11-24 16:57 ` [tip:sched/core] sched, x86: Optimize branch hint in __switch_to() tip-bot for Tim Blechmann
2009-11-24 17:28 ` Brian Gerst
2009-11-25 9:03 ` Tim Blechmann
2009-11-25 15:53 ` Brian Gerst
2009-11-25 16:16 ` index 780cd92..22db86a 100644 Brian Gerst
2009-11-25 16:17 ` [PATCH] x86, 64-bit: Set data segments to null after switching to 64-bit mode Brian Gerst
2009-11-26 9:56 ` [tip:x86/asm] " tip-bot for Brian Gerst
2009-11-29 11:44 ` [PATCH] " Tim Blechmann
2009-12-02 11:32 ` [PATCH] Revert "sched, x86: Optimize branch hint in __switch_to()" Tim Blechmann
2009-12-02 13:27 ` [tip:sched/core] " tip-bot for Tim Blechmann
2009-11-24 10:55 ` [PATCH 2/5] sched.c: change branch hint Tim Blechmann
2009-11-24 16:56 ` [tip:sched/core] sched: Optimize branch hint in context_switch() tip-bot for Tim Blechmann
2009-11-24 10:55 ` [PATCH 3/5] slab.c: remove branch hint Tim Blechmann
2009-11-24 11:20 ` Ingo Molnar
2009-11-24 11:28 ` Pekka Enberg
2009-11-24 11:42 ` Ingo Molnar
2009-11-25 10:41 ` Pekka Enberg
2009-11-24 11:45 ` Tim Blechmann
2009-11-29 11:36 ` Tim Blechmann
2009-11-30 9:05 ` Pekka Enberg
2009-11-30 16:09 ` Christoph Lameter
2009-11-30 17:44 ` Pekka Enberg
2009-11-30 17:50 ` Christoph Lameter
2009-11-30 17:59 ` Tim Blechmann [this message]
2009-12-06 8:33 ` [PATCH] branch profiling on my nehalem machine showed 99% incorrect branch hints: Pekka Enberg
2009-11-24 10:55 ` [PATCH 4/5] sched_fair.c: remove branch hint Tim Blechmann
2009-11-24 16:56 ` [tip:sched/core] sched: Optimize branch hint in pick_next_task_fair() tip-bot for Tim Blechmann
2009-11-24 10:55 ` [PATCH 5/5] workqueue.c: remove branch hint Tim Blechmann
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