From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
To: Gene Heskett <gheskett@wdtv.com>
Cc: Dave Jones <davej@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: set Pentium M as PAE capable
Date: Mon, 3 Mar 2014 12:31:06 +0000 [thread overview]
Message-ID: <20140303123106.15f7b424@alan.etchedpixels.co.uk> (raw)
In-Reply-To: <201403021642.33087.gheskett@wdtv.com>
> We routinely expect 2 to 3 u-s jitters on an Atom board running a 32 bit,
> RTAI enhanced build of what is by now a 5 year old kernel. This is
> extremely board sensitive, and that same kernel running on this 4 core
> phenom, cannot stay inside of 40 u-s. A case of more horsepower not being
> a good deal at all.
Can't speak for AMD devices but I would be curious to know more on the
Intel side about this and how you measured and analysed it.
Are you running with any hyperthreading disabled, a firmware which is not
using SMM, and with any critical code pinned in cache ? How do you have
power management set up ?
(probably best taken off list)
Alan
next prev parent reply other threads:[~2014-03-03 12:31 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-25 6:01 Chris Bainbridge
2014-02-25 10:45 ` H. Peter Anvin
2014-02-25 11:35 ` Borislav Petkov
2014-02-25 12:06 ` Peter Hurley
2014-02-25 12:07 ` One Thousand Gnomes
2014-02-25 16:26 ` Dave Jones
2014-02-25 17:16 ` H. Peter Anvin
2014-02-26 12:12 ` Chris Bainbridge
2014-02-26 13:18 ` Borislav Petkov
2014-02-26 15:49 ` Dave Jones
2014-02-26 17:18 ` Borislav Petkov
2014-02-26 17:20 ` Dave Jones
2014-02-26 17:28 ` Borislav Petkov
2014-02-28 7:30 ` Chris Bainbridge
[not found] ` <CAKKYfmFgVjYwvThpB0FBB+ggOwULWKLpz7ADT1eojno_KtD9yw@mail.gmail.com>
2014-02-28 14:00 ` Chris Bainbridge
2014-03-02 20:56 ` Andreas Mohr
2014-03-02 20:59 ` H. Peter Anvin
2014-03-02 21:02 ` Dave Jones
2014-03-02 21:04 ` Borislav Petkov
2014-03-02 21:13 ` Andreas Mohr
2014-03-02 21:42 ` Gene Heskett
2014-03-03 12:31 ` One Thousand Gnomes [this message]
2014-03-03 8:04 ` Chris Bainbridge
2014-03-03 19:29 ` Borislav Petkov
2014-03-04 5:01 ` Chris Bainbridge
2014-03-04 5:04 ` H. Peter Anvin
2014-03-04 6:06 ` Chris Bainbridge
2014-03-04 10:44 ` Borislav Petkov
2014-03-05 4:17 ` Chris Bainbridge
2014-03-07 11:40 ` [PATCH] x86: Add forcepae parameter for booting PAE kernels on PAE-disabled Pentium M Chris Bainbridge
2014-03-10 10:25 ` Borislav Petkov
2014-03-20 23:30 ` [tip:x86/cpu] x86, cpu: " tip-bot for Chris Bainbridge
2014-03-20 23:33 ` tip-bot for Chris Bainbridge
2014-03-20 23:30 ` [tip:x86/cpu] Rename TAINT_UNSAFE_SMP to TAINT_CPU_OUT_OF_SPEC tip-bot for Dave Jones
2014-02-26 16:46 ` [PATCH] x86: set Pentium M as PAE capable H. Peter Anvin
2014-02-26 16:44 ` Matthew Garrett
2014-02-26 16:45 ` H. Peter Anvin
2014-02-26 17:10 ` Matthew Garrett
2014-02-26 17:57 ` H. Peter Anvin
2014-03-03 0:11 ` H. Peter Anvin
2014-03-02 19:05 Roland Kletzing
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