From: mulyadi.santosa@gmail.com (Mulyadi Santosa)
To: kernelnewbies@lists.kernelnewbies.org
Subject: dd test discussion (was Re: possible regression?)
Date: Sun, 23 Jan 2011 00:41:51 +0700 [thread overview]
Message-ID: <AANLkTi=rBA_93GQ6buyZSdoss=M0Y_b6FD6Xjy1c6raw@mail.gmail.com> (raw)
In-Reply-To: <20110122120025.GA32605@bimsstein>
Hi again :)
On Sat, Jan 22, 2011 at 19:00, Henry Gebhardt
<hsggebhardt@googlemail.com> wrote:
> The highest I get is 8.5 GB/s with bs=22528 on 2.6.37.
Thanks for sharing your script. Looking at the gnuplot output (again,
thanks for the gnuplot quick hint :) ), I saw it is capped around 7.26
GiB/s, with block size around 300,000-400,000 (that means 293 - 391
KiB, right?)
It's 2.6.36 btw...
I think major factor that involve here, but not limited to them, are:
- L1/L2/L3 cache size
- slab allocator we use
- current memory fragmentation level
- read ahead size
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
prev parent reply other threads:[~2011-01-22 17:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-22 4:49 dd test discussion (was Re: possible regression?) Mulyadi Santosa
2011-01-22 12:00 ` Henry Gebhardt
2011-01-22 16:30 ` Mulyadi Santosa
2011-01-22 20:09 ` Henry Gebhardt
2011-01-23 3:25 ` Mulyadi Santosa
2011-01-22 17:41 ` Mulyadi Santosa [this message]
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