From: thomas.petazzoni@free-electrons•com (Thomas Petazzoni)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v4 0/5] mtd: pxa3xx_nand: rework the timing setup
Date: Thu, 22 Oct 2015 17:42:44 +0200 [thread overview]
Message-ID: <20151022174244.61eaf79e@free-electrons.com> (raw)
In-Reply-To: <CAAEAJfCmo5u6=5GN6+k8GsFhC0dg477gVYY+t77uODP-PgWLGw@mail.gmail.com>
Dear Ezequiel Garcia,
On Thu, 22 Oct 2015 12:22:24 -0300, Ezequiel Garcia wrote:
> Could you compare NAND throughput using keep-config (keeping
> the bootloader timings) and without keep-config (with ONFI timings) ?
Seems like we are within the measurement noise. I did each test only
once, and the test lasts only a few seconds, but here are the results:
Without keep-config (i.e ONFI timings) :
# time dd if=/dev/mtd3 of=/dev/null bs=1M
32+0 records in
32+0 records out
real 0m 3.54s
user 0m 0.00s
sys 0m 0.26s
With keep-config (i.e bootloader timings)
# time dd if=/dev/mtd3 of=/dev/null bs=1M
32+0 records in
32+0 records out
real 0m 3.77s
user 0m 0.00s
sys 0m 0.21s
I.e we are apparently slightly faster with the ONFI timings. However
again, the test duration is very short, and I didn't repeat the test
several times.
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
next prev parent reply other threads:[~2015-10-22 15:42 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-21 8:28 [PATCH v4 0/5] mtd: pxa3xx_nand: rework the timing setup Antoine Tenart
2015-10-21 8:29 ` [PATCH v4 1/5] mtd: pxa3xx: prepare allowing compile test Antoine Tenart
2015-10-21 8:29 ` [PATCH v4 2/5] mtd: nand: allow compile test of MTD_NAND_PXA3xx Antoine Tenart
2015-10-26 18:34 ` Brian Norris
2015-10-21 8:29 ` [PATCH v4 3/5] mtd: pxa3xx_nand: add helpers to setup the timings Antoine Tenart
2015-10-21 8:29 ` [PATCH v4 4/5] mtd: pxa3xx_nand: rework flash detection and timing setup Antoine Tenart
2015-10-21 8:29 ` [PATCH v4 5/5] mtd: pxa3xx_nand: clean up the pxa3xx timings Antoine Tenart
2015-10-22 15:12 ` [PATCH v4 0/5] mtd: pxa3xx_nand: rework the timing setup Thomas Petazzoni
2015-10-22 15:22 ` Ezequiel Garcia
2015-10-22 15:42 ` Thomas Petazzoni [this message]
2015-11-02 15:49 ` Ezequiel Garcia
2015-10-25 20:53 ` Robert Jarzmik
2015-10-26 13:50 ` Ezequiel Garcia
2015-10-26 18:38 ` Brian Norris
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