From: Andi Kleen <ak@linux.intel.com>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
hch@infradead.org, Jens Axboe <jaxboe@fusionio.com>
Subject: Re: [PATCH 10/11] VFS: Cache request_queue in struct block_device
Date: Thu, 18 Aug 2011 14:03:56 -0700 [thread overview]
Message-ID: <4E4D7E3C.8060104@linux.intel.com> (raw)
In-Reply-To: <20110818194245.GJ15413@redhat.com>
> Is the performance gain because of this one less dereference really
> substantial.
Yes it is measurable on a large macro benchmark.
The gain is from doing the prefetch early enough, and that needs the
additional pointer.
-Andi
next prev parent reply other threads:[~2011-08-18 21:03 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-02 4:38 Updated direct IO optimization patchkit v2 Andi Kleen
2011-08-02 4:38 ` [PATCH 01/11] DIO: Separate fields only used in the submission path from struct dio Andi Kleen
2011-08-08 17:59 ` Jeff Moyer
2011-08-08 19:43 ` Andi Kleen
2011-08-08 19:46 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 02/11] DIO: Fix a wrong comment Andi Kleen
2011-08-08 17:59 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 03/11] DIO: Rearrange fields in dio/dio_submit to avoid holes Andi Kleen
2011-08-08 18:00 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 04/11] DIO: Use a slab cache for struct dio Andi Kleen
2011-08-08 18:01 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 05/11] DIO: Separate map_bh from dio v2 Andi Kleen
2011-08-08 18:11 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 06/11] DIO: Inline the complete submission path v2 Andi Kleen
2011-08-08 18:14 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 07/11] DIO: Merge direct_io_walker into __blockdev_direct_IO Andi Kleen
2011-08-08 18:20 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 08/11] DIO: Remove unnecessary dio argument from dio_pages_present() Andi Kleen
2011-08-08 18:21 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 09/11] DIO: Remove unused dio parameter from dio_bio_add_page Andi Kleen
2011-08-08 18:21 ` Jeff Moyer
2011-08-02 4:38 ` [PATCH 10/11] VFS: Cache request_queue in struct block_device Andi Kleen
2011-08-08 18:22 ` Jeff Moyer
2011-08-18 19:42 ` Vivek Goyal
2011-08-18 21:03 ` Andi Kleen [this message]
2011-08-19 14:14 ` Vivek Goyal
2011-08-19 15:36 ` Andi Kleen
2011-08-19 15:55 ` Vivek Goyal
2011-08-19 16:23 ` Andi Kleen
2011-08-19 16:51 ` Vivek Goyal
2011-08-02 4:38 ` [PATCH 11/11] DIO: optimize cache misses in the submission path Andi Kleen
2011-08-08 18:43 ` Jeff Moyer
2011-08-08 19:32 ` Andi Kleen
2011-08-08 19:38 ` Jeff Moyer
2011-08-18 17:53 ` Updated direct IO optimization patchkit v2 Jeff Moyer
-- strict thread matches above, loose matches on Subject: below --
2011-08-29 23:23 Updated direct IO optimization patchkit v3 Andi Kleen
2011-08-29 23:23 ` [PATCH 10/11] VFS: Cache request_queue in struct block_device Andi Kleen
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