From: Rik van Riel <riel@redhat.com>
To: Dave Hansen <dave@sr71.net>, x86@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
akpm@linux-foundation.org, kirill.shutemov@linux.intel.com,
mgorman@suse.de, ak@linux.intel.com, alex.shi@linaro.org,
dave.hansen@linux.intel.com
Subject: Re: [PATCH 6/6] x86: mm: set TLB flush tunable to sane value (33)
Date: Tue, 22 Apr 2014 17:33:53 -0400 [thread overview]
Message-ID: <5356E041.3060709@redhat.com> (raw)
In-Reply-To: <20140421182428.FC2104C1@viggo.jf.intel.com>
On 04/21/2014 02:24 PM, Dave Hansen wrote:
> From: Dave Hansen <dave.hansen@linux.intel.com>
>
> This has been run through Intel's LKP tests across a wide range
> of modern sytems and workloads and it wasn't shown to make a
> measurable performance difference positive or negative.
>
> Now that we have some shiny new tracepoints, we can actually
> figure out what the heck is going on.
>
> During a kernel compile, 60% of the flush_tlb_mm_range() calls
> are for a single page. It breaks down like this:
> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2014-04-22 21:34 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-21 18:24 [PATCH 0/6] x86: rework tlb range flushing code Dave Hansen
2014-04-21 18:24 ` [PATCH 1/6] x86: mm: clean up tlb " Dave Hansen
2014-04-22 16:53 ` Rik van Riel
2014-04-24 8:33 ` Mel Gorman
2014-04-21 18:24 ` [PATCH 2/6] x86: mm: rip out complicated, out-of-date, buggy TLB flushing Dave Hansen
2014-04-22 16:54 ` Rik van Riel
2014-04-24 8:45 ` Mel Gorman
2014-04-24 16:58 ` Dave Hansen
2014-04-24 18:00 ` Mel Gorman
2014-04-25 21:39 ` Dave Hansen
2014-04-21 18:24 ` [PATCH 3/6] x86: mm: fix missed global TLB flush stat Dave Hansen
2014-04-22 17:15 ` Rik van Riel
2014-04-24 8:49 ` Mel Gorman
2014-04-21 18:24 ` [PATCH 4/6] x86: mm: trace tlb flushes Dave Hansen
2014-04-22 21:19 ` Rik van Riel
2014-04-24 10:14 ` Mel Gorman
2014-04-24 20:42 ` Dave Hansen
2014-04-21 18:24 ` [PATCH 5/6] x86: mm: new tunable for single vs full TLB flush Dave Hansen
2014-04-22 21:31 ` Rik van Riel
2014-04-24 10:37 ` Mel Gorman
2014-04-24 17:25 ` Dave Hansen
2014-04-24 17:53 ` Rik van Riel
2014-04-24 22:03 ` Dave Hansen
2014-07-07 17:43 ` Dave Hansen
2014-07-08 0:43 ` Alex Shi
2014-04-21 18:24 ` [PATCH 6/6] x86: mm: set TLB flush tunable to sane value (33) Dave Hansen
2014-04-22 21:33 ` Rik van Riel [this message]
2014-04-24 10:46 ` Mel Gorman
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