From: Theo Veenker <T.J.G.Veenker@domain.hid>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: Xenomai help <xenomai@xenomai.org>
Subject: Re: [Xenomai-help] PCI id missing from arch/x86/smi.c
Date: Mon, 12 Jul 2010 14:57:45 +0200 [thread overview]
Message-ID: <4C3B1149.90309@domain.hid> (raw)
In-Reply-To: <4C3B0CEB.7040906@domain.hid>
Jan Kiszka wrote:
> Theo Veenker wrote:
>> Hi,
>>
>> About a year ago when installing Xenomai on a new box it appeared this
>> particular system required an addition to the PDI IDs table in arch/x86/smi.c.
>> See this thread: https://mail.gna.org/public/xenomai-help/2009-08/msg00031.html
>> Gilles said he would make the change to smi.c. That was with 2.4.8.
>>
>> Now I'm trying 2.5.3 but again the same PCI ID is missing. Is there a
>> particular reason not to include this ID? On this system the SMI detection
>> stuff doesn't work without it.
>>
>> It requires adding this line to rthal_smi_pci_tbl[]:
>> {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_1)},
>
> Does the SMI disabling actually work, ie. do you _measure_ any
> difference? I'm asking as I think to remember that recent (but older
> than ICH10) Intel chipset no longer provide the required interface or at
> least changed it in an incompatible way.
Yes it does. First I got high latencies (~1800us). Then I remembered that I had to
disable SMI on this platform, so I recompiled with SMI disabled, to find out it
didn't make a difference. In the messages log I saw it didn't say anything about
SMI so I looked into it and found out the PCI ID I had in before was gone. I added
it and now the SMI workaround works and the high latencies are gone.
Theo
next prev parent reply other threads:[~2010-07-12 12:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-12 12:16 [Xenomai-help] PCI id missing from arch/x86/smi.c Theo Veenker
2010-07-12 12:35 ` Gilles Chanteperdrix
2010-07-12 12:39 ` Jan Kiszka
2010-07-12 12:57 ` Theo Veenker [this message]
2010-07-20 13:41 ` [Xenomai-help] [PATCH] x86: add Intel ICH10_1 to rthal_smi_pci_tbl Stefan Kisdaroczi
2010-08-01 13:40 ` Gilles Chanteperdrix
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=4C3B1149.90309@domain.hid \
--to=t.j.g.veenker@domain.hid \
--cc=jan.kiszka@domain.hid \
--cc=xenomai@xenomai.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.