From: Martin Costabel <costabel@wanadoo.fr>
To: "Timothy A. Seufert" <tas@mindspring.com>
Cc: Linux/PPC Development <linuxppc-dev@lists.linuxppc.org>
Subject: Re: Interrupt hick ups
Date: Fri, 16 Jun 2000 19:27:46 +0200 [thread overview]
Message-ID: <394A6392.4C9FAAA0@wanadoo.fr> (raw)
In-Reply-To: v04220804b56f910f22ca@[10.0.0.42]
"Timothy A. Seufert" wrote:
> Have you made sure your HD is set up for DMA, etc.? For example, do
> "hdparm -d1 -u1 -m16 -p4 /dev/hda" and then run the -t throughput
> test. (Use the man pages to make sure those are sane options, that's
> all from memory.)
>
> I remember similar fluctuation in 2.2.x as automatic negotiation of
> DMA and so forth was first put in then taken out of the IDE driver.
>
> Also, to make sure buffers get flushed before a test (for repeatable
> results) you should do hdparm -Tt, not just hdparm -t.
Yes, I did all this, except the -d1 bit which doesn't do anything on my
old drive. The numbers I gave were the maximum I could get with any kind
of tweaking.
Anyway, I am not really complaining (there are far more serious bugs in
-ac16), I guess it was just something too nice to stay for real.
--
Martin
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2000-06-16 17:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-06-13 21:19 Interrupt hick ups Geert Uytterhoeven
2000-06-14 20:40 ` Geert Uytterhoeven
2000-06-16 7:56 ` Martin Costabel
2000-06-16 8:12 ` Timothy A. Seufert
2000-06-16 8:35 ` ide-speed was " Andreas Tobler
2000-06-16 17:27 ` Martin Costabel [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=394A6392.4C9FAAA0@wanadoo.fr \
--to=costabel@wanadoo.fr \
--cc=linuxppc-dev@lists.linuxppc.org \
--cc=tas@mindspring.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).