From: Jaehoon Chung <jh80.chung@samsung.com>
To: Andrei Warkentin <andreiw@motorola.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>,
linux-mmc@vger.kernel.org, arindam.nath@amd.com, cjb@laptop.org,
arnd@arndb.de, Kyungmin Park <kyungmin.park@samsung.com>
Subject: Re: [[v4] 2/5] MMC: Use CMD23 for multiblock transfers when we can.
Date: Fri, 20 May 2011 13:38:29 +0900 [thread overview]
Message-ID: <4DD5F045.90001@samsung.com> (raw)
In-Reply-To: <BANLkTi=yJuEtN-SSokhp5CE_mCz9D9D5SA@mail.gmail.com>
Hi Andrei,
Andrei Warkentin wrote:
> On Wed, May 18, 2011 at 9:37 PM, Jaehoon Chung <jh80.chung@samsung.com> wrote:
>> Hi Andrei
>>
>> Andrei Warkentin wrote:
>>> CMD23-prefixed instead of open-ended multiblock transfers
>>> have a performance advantage on some MMC cards.
>>>
>> you mentioned about "some MMC cards".
>> Conversely, that means the some card didn't have a performance advantage?
>>
>> Did you find the performance advantage?
>> if you found the advantage and you can tell me,
>> i want to know what do you have the some MMC cards..
>>
>
> I've tested this on a Sandisk eMMC where I saw as good as
> a 50% improvement on writes (30% real-life use cases). This was a
> SEM32G 4.3+ part.
Can you tell me your environment? buswidth, AP information, benchmark etc..
And if you have the performance result's data, can you share them?
Regards,
Jaehoon Chung
next prev parent reply other threads:[~2011-05-20 4:38 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-14 0:38 SET_BLOCK_COUNT-bounded multiblock transfers Andrei Warkentin
2011-04-14 0:03 ` Andrei Warkentin
2011-04-14 9:05 ` Gao, Yunpeng
2011-04-14 22:58 ` Andrei Warkentin
2011-04-14 23:18 ` Chris Ball
2011-04-15 7:10 ` Andrei Warkentin
2011-04-15 17:29 ` Andrei Warkentin
2011-04-14 0:38 ` [RFC 1/3] MMC: use CMD23 for multiblock transfers when we can Andrei Warkentin
2011-04-14 0:38 ` [RFC 2/3] MMC: Implement MMC_CAP_CMD23 for SDHCI Andrei Warkentin
2011-04-14 0:38 ` [RFC 3/3] MMC: Block CMD23 support for UHS104/SDXC cards Andrei Warkentin
2011-04-15 23:51 ` [patchv2 1/3] MMC: Use CMD23 for multiblock transfers when we can Andrei Warkentin
2011-04-15 23:51 ` [patchv2 2/3] MMC: Implement MMC_CAP_CMD23 for SDHCI Andrei Warkentin
2011-04-15 23:51 ` [patchv2 3/3] MMC: Block CMD23 support for UHS104/SDXC cards Andrei Warkentin
2011-04-16 10:40 ` CMD23 plumbing and support patchset Andrei Warkentin
2011-04-21 1:44 ` Chris Ball
2011-04-21 6:29 ` Andrei Warkentin
2011-04-21 6:30 ` Andrei Warkentin
2011-04-22 3:53 ` Andrei Warkentin
2011-04-23 2:51 ` Chris Ball
2011-04-26 23:30 ` Andrei Warkentin
2011-04-27 2:10 ` CMD23 plumbing patchset Andrei Warkentin
2011-04-27 2:10 ` [[v4] 1/5] MMC: Add/remove quirks conditional support Andrei Warkentin
2011-04-27 2:10 ` [[v4] 2/5] MMC: Use CMD23 for multiblock transfers when we can Andrei Warkentin
2011-04-27 2:10 ` [[v4] 3/5] MMC: Implement MMC_CAP_CMD23 for SDHCI Andrei Warkentin
2011-04-27 2:10 ` [[v4] 4/5] MMC: Block CMD23 support for UHS104/SDXC cards Andrei Warkentin
2011-04-27 2:10 ` [[v4] 5/5] MMC: SDHCI AutoCMD23 support Andrei Warkentin
2011-04-27 5:49 ` Nath, Arindam
2011-04-27 5:59 ` Andrei Warkentin
2011-04-27 6:02 ` Nath, Arindam
2011-04-27 6:05 ` Andrei Warkentin
2011-04-28 8:34 ` Nath, Arindam
2011-04-28 19:09 ` Andrei Warkentin
2011-04-29 5:34 ` Nath, Arindam
2011-05-19 2:37 ` [[v4] 2/5] MMC: Use CMD23 for multiblock transfers when we can Jaehoon Chung
2011-05-19 17:01 ` Andrei Warkentin
2011-05-20 4:38 ` Jaehoon Chung [this message]
[not found] ` <BANLkTik72KgftDWz6aNn=zGDqj1uMpwnYw@mail.gmail.com>
2011-05-20 6:54 ` Andrei Warkentin
2011-05-20 9:05 ` Jaehoon Chung
2011-05-23 12:40 ` Jaehoon Chung
2011-05-23 19:25 ` Andrei Warkentin
2011-05-23 19:33 ` Andrei Warkentin
2011-05-23 19:34 ` Andrei Warkentin
2011-05-23 20:45 ` Andrei Warkentin
2011-05-24 0:07 ` Jaehoon Chung
2011-04-29 23:25 ` CMD23 plumbing patchset Andrei Warkentin
2011-05-19 21:46 ` Andrei Warkentin
2011-05-23 20:06 ` Andrei Warkentin
2011-05-25 2:51 ` Chris Ball
2011-05-23 20:06 ` [v6 1/5] MMC: Add/remove quirks conditional support Andrei Warkentin
2011-05-23 20:06 ` [v6 2/5] MMC: Use CMD23 for multiblock transfers when we can Andrei Warkentin
2011-05-23 20:06 ` [v6 3/5] MMC: Implement MMC_CAP_CMD23 for SDHCI Andrei Warkentin
2011-05-23 20:06 ` [v6 4/5] MMC: Block CMD23 support for UHS104/SDXC cards Andrei Warkentin
2011-05-24 6:01 ` Nath, Arindam
2011-05-23 20:06 ` [v6 5/5] MMC: SDHCI AutoCMD23 support Andrei Warkentin
2011-05-24 23:27 ` Chris Ball
2011-05-25 0:37 ` Andrei Warkentin
2011-05-19 21:46 ` [v5 1/5] MMC: Add/remove quirks conditional support Andrei Warkentin
2011-05-19 21:46 ` [v5 2/5] MMC: Use CMD23 for multiblock transfers when we can Andrei Warkentin
2011-05-20 10:29 ` Jaehoon Chung
2011-05-20 18:12 ` Andrei Warkentin
2011-05-19 21:46 ` [v5 3/5] MMC: Implement MMC_CAP_CMD23 for SDHCI Andrei Warkentin
2011-05-19 21:46 ` [v5 4/5] MMC: Block CMD23 support for UHS104/SDXC cards Andrei Warkentin
2011-05-20 10:38 ` Nath, Arindam
2011-05-20 18:09 ` Andrei Warkentin
2011-05-19 21:46 ` [v5 5/5] MMC: SDHCI AutoCMD23 support Andrei Warkentin
2011-05-20 10:46 ` Nath, Arindam
2011-05-20 18:08 ` Andrei Warkentin
2011-04-16 10:40 ` [patchv3 1/5] MMC: Add/remove quirks conditional support Andrei Warkentin
2011-04-16 10:40 ` [patchv3 2/5] MMC: Use CMD23 for multiblock transfers when we can Andrei Warkentin
2011-04-17 17:23 ` Arnd Bergmann
2011-04-17 19:27 ` Andrei Warkentin
2011-04-19 3:44 ` Andrei Warkentin
2011-04-19 7:39 ` Arnd Bergmann
2011-04-19 15:18 ` Andrei Warkentin
2011-04-16 10:40 ` [patchv3 3/5] MMC: Implement MMC_CAP_CMD23 for SDHCI Andrei Warkentin
2011-04-16 10:40 ` [patchv3 4/5] MMC: Block CMD23 support for UHS104/SDXC cards Andrei Warkentin
2011-04-16 16:19 ` Nath, Arindam
2011-04-16 23:00 ` Andrei Warkentin
2011-04-16 23:38 ` [PATCH] " Andrei Warkentin
2011-04-16 10:40 ` [patchv3 5/5] MMC: SDHCI AutoCMD23 support Andrei Warkentin
2011-04-17 17:25 ` Arnd Bergmann
2011-04-17 19:31 ` Andrei Warkentin
2011-04-19 3:05 ` Andrei Warkentin
2011-04-19 3:19 ` Nath, Arindam
2011-04-19 3:32 ` Andrei Warkentin
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