From: per.forlin@linaro.org (Per Forlin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] mmc: mxs-mmc: add support for pre_req and post_req
Date: Wed, 20 Apr 2011 17:22:34 +0200 [thread overview]
Message-ID: <BANLkTi=UR4NDEGjFkTnp_2UG4T1qUEPATw@mail.gmail.com> (raw)
In-Reply-To: <20110420140120.GF1965@S2100-06.ap.freescale.net>
On 20 April 2011 16:01, Shawn Guo <shawn.guo@freescale.com> wrote:
> On Wed, Apr 20, 2011 at 10:01:22AM +0200, Per Forlin wrote:
>> On 17 April 2011 18:48, Shawn Guo <shawn.guo@freescale.com> wrote:
>> > On Mon, Apr 18, 2011 at 12:33:30AM +0800, Shawn Guo wrote:
>> >> pre_req() runs dma_map_sg() post_req() runs dma_unmap_sg.
>> >> If not calling pre_req() before mxs_mmc_request(), request()
>> >> will prepare the cache just like it did it before.
>> >> It is optional to use pre_req() and post_req().
>> >>
>> >> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
>> >> ---
>> >> ?drivers/mmc/host/mxs-mmc.c | ? 75 ++++++++++++++++++++++++++++++++++++++++++--
>> >> ?1 files changed, 72 insertions(+), 3 deletions(-)
>> >>
>> >
>> > Here is the result of mmc_test case 37 ~ 40, which are designed to see
>> > the performance improvement introduced by non-blocking changes.
>> >
>> > Honestly, the improvement is not so impressive. ?Not sure if the patch
>> > for mxs-mmc pre_req and post_req support was correctly produced. ?So
>> > please help review ...
>> My guess is that dma_unmap is not run in parallel with transfer.
>> Please look at my patch reply.
>>
> Got it fixed in v2 posted just now. ?Please take another look.
> Unfortunately, I do not see noticeable difference than v1 in terms
> of mmc_test result.
>
> Do you have omap_hsmmc and mmci mmc_test result data to share?
>
I keep the here:
https://wiki.linaro.org/WorkingGroups/Kernel/Specs/StoragePerfMMC-async-req
> --
> Regards,
> Shawn
>
>
/Per
next prev parent reply other threads:[~2011-04-20 15:22 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-06 19:07 [PATCH v2 00/12] mmc: use nonblock mmc requests to minimize latency Per Forlin
2011-04-06 19:07 ` [PATCH v2 01/12] mmc: add none blocking mmc request function Per Forlin
2011-04-15 10:34 ` David Vrabel
2011-04-20 7:17 ` Per Forlin
2011-04-26 13:29 ` David Vrabel
2011-04-26 14:22 ` Per Forlin
2011-04-06 19:07 ` [PATCH v2 02/12] mmc: mmc_test: add debugfs file to list all tests Per Forlin
2011-04-06 19:07 ` [PATCH v2 03/12] mmc: mmc_test: add test for none blocking transfers Per Forlin
2011-04-17 7:09 ` Lin Tony-B19295
2011-04-20 7:30 ` Per Forlin
2011-04-17 15:46 ` Shawn Guo
2011-04-20 7:41 ` Per Forlin
2011-04-06 19:07 ` [PATCH v2 04/12] mmc: add member in mmc queue struct to hold request data Per Forlin
2011-04-06 19:07 ` [PATCH v2 05/12] mmc: add a block request prepare function Per Forlin
2011-04-06 19:07 ` [PATCH v2 06/12] mmc: move error code in mmc_block_issue_rw_rq to a separate function Per Forlin
2011-04-06 19:07 ` [PATCH v2 07/12] mmc: add a second mmc queue request member Per Forlin
2011-04-06 19:07 ` [PATCH v2 08/12] mmc: add handling for two parallel block requests in issue_rw_rq Per Forlin
2011-04-20 11:32 ` Per Forlin
2011-04-06 19:07 ` [PATCH v2 09/12] mmc: test: add random fault injection in core.c Per Forlin
2011-04-06 19:07 ` [PATCH v2 10/12] omap_hsmmc: use original sg_len for dma_unmap_sg Per Forlin
2011-04-06 19:07 ` [PATCH v2 11/12] omap_hsmmc: add support for pre_req and post_req Per Forlin
2011-04-06 19:07 ` [PATCH v2 12/12] mmci: implement pre_req() and post_req() Per Forlin
2011-04-08 16:49 ` [PATCH v2 00/12] mmc: use nonblock mmc requests to minimize latency Linus Walleij
2011-04-09 11:55 ` Jae hoon Chung
2011-04-10 3:33 ` anish singh
2011-04-11 9:03 ` Per Forlin
2011-04-11 9:07 ` Sachin Nikam
2011-04-11 9:08 ` Per Forlin
2011-04-19 14:30 ` Jae hoon Chung
2011-04-16 15:48 ` Shawn Guo
2011-04-20 8:19 ` Per Forlin
2011-04-16 16:48 ` [PATCH] mmc: sdhci: add support for pre_req and post_req Shawn Guo
2011-04-16 23:06 ` Andrei Warkentin
2011-04-22 11:01 ` Jaehoon Chung
2011-04-27 0:59 ` Andrei Warkentin
2011-04-26 1:26 ` Jaehoon Chung
2011-04-26 2:47 ` Shawn Guo
2011-04-26 10:21 ` Per Forlin
2011-04-17 16:33 ` [PATCH] mmc: mxs-mmc: " Shawn Guo
2011-04-17 16:48 ` Shawn Guo
2011-04-20 8:01 ` Per Forlin
2011-04-20 14:01 ` Shawn Guo
2011-04-20 15:22 ` Per Forlin [this message]
2011-04-21 6:25 ` Shawn Guo
2011-04-21 8:52 ` Per Forlin
2011-04-20 15:30 ` Per Forlin
2011-04-21 6:29 ` Shawn Guo
2011-04-21 8:46 ` Per Forlin
2011-04-21 9:11 ` Shawn Guo
2011-04-21 9:47 ` Per Forlin
2011-04-21 10:15 ` Per Forlin
2011-04-28 7:52 ` Per Forlin
2011-04-28 10:10 ` Russell King - ARM Linux
2011-04-20 7:58 ` Per Forlin
2011-04-20 8:17 ` Shawn Guo
2011-04-20 13:51 ` [PATCH v2] " Shawn Guo
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