Scheduler KTR traces for 4 variants (ULE, 4BSD)x(PREEMPTION, NOPREEMPTION) on small hardware (net5501) with network traffic (Was: vr(4) troubles for AMD Geode CS5536 chipset)

From: Lev Serebryakov <lev_at_FreeBSD.org>
Date: Wed, 12 Sep 2012 13:05:45 +0400
Hello, Adrian.
You wrote 6 сентября 2012 г., 22:12:04:

AC> On 6 September 2012 11:11, Lev Serebryakov <lev_at_freebsd.org> wrote:
>> Hello, Adrian.
>> You wrote 6 сентября 2012 г., 22:07:08:
>>
>> AC> Oh don't worry about polling just yet. I just want to see what
>> AC> preempt/no-preempt does with ULE and 4BSD on these little single-CPU
>> AC> platforms.
>>  Ok, I'll do it. Should I post 4 outputs from ktrdump? Again, I don't
>>  understand how to interpret these data by myself.
AC> Yes.
 Here:

 http://lev.serebryakov.spb.ru/ktrs/

 Tarball with all 4 outputs and all configs are placed. Setup and
results are described in "readme.txt".

 Results are strange: no visible WiFi slowdown but wired traffic
slowdown now and bad freezes in all combinations but 4BSD + PREEMPTION
_enabled_.


-- 
// Black Lion AKA Lev Serebryakov <lev_at_FreeBSD.org>
Received on Wed Sep 12 2012 - 07:05:51 UTC

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