* [ubi][wl] the W/R performance of my wear-leveling unit
[not found] <1215762163.2784.60.camel@localhost.localdomain>
@ 2008-07-11 7:42 ` xiaochuan-xu
2008-07-11 7:50 ` Artem Bityutskiy
1 sibling, 0 replies; 2+ messages in thread
From: xiaochuan-xu @ 2008-07-11 7:42 UTC (permalink / raw)
To: linux-mtd
Hi,
I've compared the current WL unit algorithm with
my new WL unit one on the W/R time.
modprobe nandsim + ubi + ubifs.
And then copy a file (9338201 Bytes) to
##time for i in `seq 1 20`; do sudo dd if=~/tmp/file of=/mnt/ubifs/file
count=1024&> /dev/null; sync; done
in the first time. the time of currenty algorithm and mine is as
following:
current UBI gives:
real 0m3.145s
user 0m0.124s
sys 0m0.700s
mine:
real 0m2.539s
user 0m0.140s
sys 0m0.772s
some more experiment share:
--
yours Sincerely,
xiaochuan-xu (许小川)
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [ubi][wl] the W/R performance of my wear-leveling unit
[not found] <1215762163.2784.60.camel@localhost.localdomain>
2008-07-11 7:42 ` [ubi][wl] the W/R performance of my wear-leveling unit xiaochuan-xu
@ 2008-07-11 7:50 ` Artem Bityutskiy
1 sibling, 0 replies; 2+ messages in thread
From: Artem Bityutskiy @ 2008-07-11 7:50 UTC (permalink / raw)
To: xiaochuan-xu; +Cc: linux-mtd
On Fri, 2008-07-11 at 15:42 +0800, xiaochuan-xu wrote:
> Hi,
>
> I've compared the current WL unit algorithm with
> my new WL unit one on the W/R time.
>
>
> modprobe nandsim + ubi + ubifs.
> And then copy a file (9338201 Bytes) to
>
> ##time for i in `seq 1 20`; do sudo dd if=~/tmp/file of=/mnt/ubifs/file
> count=1024&> /dev/null; sync; done
>
> in the first time. the time of currenty algorithm and mine is as
> following:
>
> current UBI gives:
>
> real 0m3.145s
> user 0m0.124s
> sys 0m0.700s
>
> mine:
> real 0m2.539s
> user 0m0.140s
> sys 0m0.772s
Looks promising. I'll look at this again but a bit later.
Could you please think how your patch may be split on several separate
independent patches?
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
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2008-07-11 7:42 ` [ubi][wl] the W/R performance of my wear-leveling unit xiaochuan-xu
2008-07-11 7:50 ` Artem Bityutskiy
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