From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Ralf Baechle <ralf@linux-mips.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
linux-mips@linux-mips.org, linux-ide@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mips: sb1250_swarm_defconfig: disable IDE subsystem
Date: Mon, 9 Nov 2015 22:08:28 +0300 [thread overview]
Message-ID: <5640EF2C.40907@cogentembedded.com> (raw)
In-Reply-To: <alpine.LFD.2.20.1511091827480.10231@eddie.linux-mips.org>
On 11/09/2015 09:54 PM, Maciej W. Rozycki wrote:
>>> I think I've been reasonably serious about my SWARM and despite issues
>>> elsewhere the onboard PATA interface is a part of the system I've never
>>> had any with. Yes, it's limited to PIO 3, but it's not a big deal, that's
>>> still 11MB/s (and one of the 4 generic data movers present in the SoC
>>
>> If you measure it with something like 'hdparm -t', the real speed figures
>> in the PIO modes would disappoint you. It's usually more like 3 MB/s even in
>> PIO4...
> Well, various factors contribute to actual figures possible to achieve,
> the physical medium transfer speed being an important one.
Yes, of course. Yet even with MWDMA2 (same wire speed as PIO4) hdparm
shows about an order of magnitude higher speeds, IIRC. With the UltraDMA modes
it becomes even higher...
> That 11MB/s
> throughput is the maximum you can ever get on the wire in PIO 3, assuming
> data is already available to transfer and IORDY is asserted right away
> every cycle.
Yes, I figured.
[...]
> Maciej
MBR, Sergei
next prev parent reply other threads:[~2015-11-09 19:08 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-14 15:51 [RFT PATCH] mips: bigsur_defconfig: convert to use libata PATA drivers Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: capcella_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: e55_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: fuloong2e_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: lasat_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: lemote2f_defconfig: " Bartlomiej Zolnierkiewicz
2015-10-07 17:40 ` Aaro Koskinen
2015-09-14 15:51 ` [RFT PATCH] mips: malta_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: malta_kvm_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: malta_kvm_guest_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: malta_qemu_32r6_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: maltaaprp_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: maltasmvp_eva_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: maltaup_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: maltaup_xpa_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [RFT PATCH] mips: mpc30x_defconfig: " Bartlomiej Zolnierkiewicz
2015-09-14 15:51 ` [PATCH] mips: sb1250_swarm_defconfig: disable IDE subsystem Bartlomiej Zolnierkiewicz
2015-11-09 14:33 ` Maciej W. Rozycki
2015-11-09 14:49 ` Ralf Baechle
2015-11-09 16:18 ` Maciej W. Rozycki
2015-11-09 17:33 ` Sergei Shtylyov
2015-11-09 18:54 ` Maciej W. Rozycki
2015-11-09 19:08 ` Sergei Shtylyov [this message]
2015-09-14 15:51 ` [RFT PATCH] mips: workpad_defconfig: convert to use libata PATA drivers Bartlomiej Zolnierkiewicz
2017-03-08 16:04 ` Bartlomiej Zolnierkiewicz
2015-10-06 14:23 ` [RFT PATCH] mips: bigsur_defconfig: " Ralf Baechle
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=5640EF2C.40907@cogentembedded.com \
--to=sergei.shtylyov@cogentembedded.com \
--cc=b.zolnierkie@samsung.com \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@linux-mips.org \
--cc=macro@linux-mips.org \
--cc=ralf@linux-mips.org \
/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).