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Date: Tue, 1 Jul 2008 11:21:31 -0400 (EDT)
From: Daniel Eischen <deischen@freebsd.org>
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To: Gary Jennejohn <gary.jennejohn@freenet.de>
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Cc: src-committers@freebsd.org, current@freebsd.org, vova@fbsd.ru,
	cvs-src@freebsd.org, cvs-all@freebsd.org, David Xu <davidxu@freebsd.org>
Subject: Re: [fwd] cvs commit: src/lib/libthr/thread thr_mutex.c thr_umtx.c
 thr_umtx.h src/sys/kern kern_umtx.c src/sys/sys umtx.h
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On Tue, 1 Jul 2008, Gary Jennejohn wrote:

> On Mon, 30 Jun 2008 22:28:44 +0400
> Vladimir Grebenschikov <vova@fbsd.ru> wrote:
>
>> On Tue, 2008-06-24 at 07:32 +0000, David Xu wrote:
>>
>> This commit makes threaded application almost unusable on 8-CURRENT.
>>
>> Applications eat 100% CPU all the time and works _very_ slowly.
>> (top shows several threads for every constantly applications eating CPU)
>>
>> Following applications are affected for me: firefox, evolution, eclipse
>> (probably more).
>>
>> Reverting user-land part of commit fixes problem, reverting kernel
>> changes nothing regarding the problem.
>>
>> I have:
>> FreeBSD 8.0-CURRENT #0: Fri Jun 20 17:14:23 MSD 2008
>>     root@vbook.fbsd.ru:/usr/obj/usr/src/sys/VBOOK
>> Timecounter "i8254" frequency 1193182 Hz quality 0
>> CPU: Intel(R) Core(TM)2 CPU         T7200  @ 2.00GHz (1995.01-MHz 686-class CPU)
>>   Origin = "GenuineIntel"  Id = 0x6f6  Stepping = 6
>>   Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>>   Features2=0xe3bd<SSE3,RSVD2,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM>
>>   AMD Features=0x20100000<NX,LM>
>>   AMD Features2=0x1<LAHF>
>>   Cores per package: 2
>>
> [snip commit message]
>
> Did you recompile these misbehaving applications?

If that is necessary, then something is certainly borken.  One shouldn't
have to rebuild the applications.

-- 
DE