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Subject: Re: [ubi][wl] the W/R performance of my wear-leveling unit
From: Artem Bityutskiy <dedekind@infradead.org>
To: xiaochuan-xu <xiaochuan-xu@cqu.edu.cn>
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Date: Fri, 11 Jul 2008 10:50:44 +0300
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On Fri, 2008-07-11 at 15:42 +0800, xiaochuan-xu wrote:
> Hi,
>=20
> I've compared the current WL unit algorithm with=20
> my new WL unit one on the W/R time.
>=20
>=20
> modprobe nandsim + ubi + ubifs.
> And then copy a file (9338201 Bytes) to=20
>=20
> ##time for i in `seq 1 20`; do sudo dd if=3D~/tmp/file of=3D/mnt/ubifs/fi=
le
> count=3D1024&> /dev/null; sync; done
>=20
> in the first time. the time of currenty algorithm and mine is as
> following:
>=20
> current UBI gives:
>=20
> real	0m3.145s
> user	0m0.124s
> sys	0m0.700s
>=20
> 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?=20

--=20
Best regards,
Artem Bityutskiy (=D0=91=D0=B8=D1=82=D1=8E=D1=86=D0=BA=D0=B8=D0=B9 =D0=90=
=D1=80=D1=82=D1=91=D0=BC)