From: Rik van Riel <riel@redhat.com>
To: Mel Gorman <mgorman@suse.de>, Linux-MM <linux-mm@kvack.org>
Cc: Hugh Dickins <hughd@google.com>, Minchan Kim <minchan@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Andi Kleen <andi@firstfloor.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/4] mm: Gather more PFNs before sending a TLB to flush unmapped pages
Date: Thu, 16 Apr 2015 12:00:07 -0400 [thread overview]
Message-ID: <552FDC87.6040004@redhat.com> (raw)
In-Reply-To: <1429179766-26711-4-git-send-email-mgorman@suse.de>
On 04/16/2015 06:22 AM, Mel Gorman wrote:
> The patch "mm: Send a single IPI to TLB flush multiple pages when unmapping"
> would batch 32 pages before sending an IPI. This patch increases the size of
> the data structure to hold a pages worth of PFNs before sending an IPI. This
> is a trade-off between memory usage and reducing IPIS sent. In the ideal
> case where multiple processes are reading large mapped files, this patch
> reduces interrupts/second from roughly 180K per second to 60K per second.
>
> Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
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WARNING: multiple messages have this Message-ID (diff)
From: Rik van Riel <riel@redhat.com>
To: Mel Gorman <mgorman@suse.de>, Linux-MM <linux-mm@kvack.org>
Cc: Hugh Dickins <hughd@google.com>, Minchan Kim <minchan@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Andi Kleen <andi@firstfloor.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/4] mm: Gather more PFNs before sending a TLB to flush unmapped pages
Date: Thu, 16 Apr 2015 12:00:07 -0400 [thread overview]
Message-ID: <552FDC87.6040004@redhat.com> (raw)
In-Reply-To: <1429179766-26711-4-git-send-email-mgorman@suse.de>
On 04/16/2015 06:22 AM, Mel Gorman wrote:
> The patch "mm: Send a single IPI to TLB flush multiple pages when unmapping"
> would batch 32 pages before sending an IPI. This patch increases the size of
> the data structure to hold a pages worth of PFNs before sending an IPI. This
> is a trade-off between memory usage and reducing IPIS sent. In the ideal
> case where multiple processes are reading large mapped files, this patch
> reduces interrupts/second from roughly 180K per second to 60K per second.
>
> Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
next prev parent reply other threads:[~2015-04-16 16:00 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-16 10:22 [RFC PATCH 0/4] TLB flush multiple pages with a single IPI v2 Mel Gorman
2015-04-16 10:22 ` Mel Gorman
2015-04-16 10:22 ` [PATCH 1/4] x86, mm: Trace when an IPI is about to be sent Mel Gorman
2015-04-16 10:22 ` Mel Gorman
2015-04-16 15:51 ` Rik van Riel
2015-04-16 15:51 ` Rik van Riel
2015-04-16 16:55 ` Dave Hansen
2015-04-16 16:55 ` Dave Hansen
2015-04-16 17:39 ` Mel Gorman
2015-04-16 17:39 ` Mel Gorman
2015-04-16 10:22 ` [PATCH 2/4] mm: Send a single IPI to TLB flush multiple pages when unmapping Mel Gorman
2015-04-16 10:22 ` Mel Gorman
2015-04-16 15:52 ` Rik van Riel
2015-04-16 15:52 ` Rik van Riel
2015-04-16 19:21 ` Hugh Dickins
2015-04-16 19:21 ` Hugh Dickins
2015-04-16 10:22 ` [PATCH 3/4] mm: Gather more PFNs before sending a TLB to flush unmapped pages Mel Gorman
2015-04-16 10:22 ` Mel Gorman
2015-04-16 16:00 ` Rik van Riel [this message]
2015-04-16 16:00 ` Rik van Riel
2015-04-16 10:22 ` [PATCH 4/4] mm: migrate: Batch TLB flushing when unmapping pages for migration Mel Gorman
2015-04-16 10:22 ` Mel Gorman
2015-04-16 10:51 ` Mel Gorman
2015-04-16 10:51 ` Mel Gorman
2015-04-16 16:01 ` Rik van Riel
2015-04-16 16:01 ` Rik van Riel
2015-04-16 18:57 ` Hugh Dickins
2015-04-16 18:57 ` Hugh Dickins
2015-04-16 19:34 ` Mel Gorman
2015-04-16 19:34 ` Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2015-04-15 10:42 [RFC PATCH 0/4] TLB flush multiple pages with a single IPI Mel Gorman
2015-04-15 10:42 ` [PATCH 3/4] mm: Gather more PFNs before sending a TLB to flush unmapped pages Mel Gorman
2015-04-15 10:42 ` Mel Gorman
2015-04-15 11:42 ` Peter Zijlstra
2015-04-15 11:42 ` Peter Zijlstra
2015-04-15 12:15 ` Mel Gorman
2015-04-15 12:15 ` Mel Gorman
2015-04-15 12:24 ` Peter Zijlstra
2015-04-15 12:24 ` Peter Zijlstra
2015-04-15 12:56 ` Mel Gorman
2015-04-15 12:56 ` Mel Gorman
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