Date: Mon, 16 Apr 2012 17:50:40 -0400 From: Arnaud Lacombe <lacombar@gmail.com> To: freebsd-stable <freebsd-stable@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Complete hang on 9.0-RELEASE Message-ID: <CACqU3MWx5S-v4jya2JEtT6d=9TOXcyR_Do8yybBY8%2Bkg16HpxA@mail.gmail.com> In-Reply-To: <CACqU3MUefo4mG3GdZnj6kxxFx4H_M3-NLys8pCKptqNU4r_ywA@mail.gmail.com> References: <CACqU3MUefo4mG3GdZnj6kxxFx4H_M3-NLys8pCKptqNU4r_ywA@mail.gmail.com>
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Hi,
[for the record...]
On Tue, Feb 14, 2012 at 11:41 AM, Arnaud Lacombe <lacombar@gmail.com> wrote=
:
> Hi folks,
>
> For the records, I was running some tests yesterday on top of a
> 9.0-RELEASE, amd64, kernel when the box hanged. At the time of the
> hang, the box was running a process with about 2800 threads with heavy
> IPC between 1400 writers and 1400 readers. The box was in single user
> mode (/bin/sh coming from FreeBSD 7.4-STABLE). Here is the beginning
> of the dmesg:
>
> Copyright (c) 1992-2012 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
> =A0 =A0 =A0 =A0The Regents of the University of California. All rights re=
served.
> FreeBSD is a registered trademark of The FreeBSD Foundation.
> FreeBSD 9.0-RELEASE #0: Tue Jan =A03 07:46:30 UTC 2012
> =A0 =A0root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
> CPU: Intel(R) Atom(TM) CPU D510 =A0 @ 1.66GHz (1666.70-MHz K8-class CPU)
> =A0Origin =3D "GenuineIntel" =A0Id =3D 0x106ca =A0Family =3D 6 =A0Model =
=3D 1c =A0Stepping =3D 10
> =A0Features=3D0xbfebfbff<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>
> =A0Features2=3D0x40e31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM,M=
OVBE>
> =A0AMD Features=3D0x20000800<SYSCALL,LM>
> =A0AMD Features2=3D0x1<LAHF>
> =A0TSC: P-state invariant, performance statistics
> real memory =A0=3D 2137587712 (2038 MB)
> avail memory =3D 2037841920 (1943 MB)
> Event timer "LAPIC" quality 400
> ACPI APIC Table: <070611 APIC1125>
> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
> FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 HTT threads
> =A0cpu0 (BSP): APIC ID: =A00
> =A0cpu1 (AP/HT): APIC ID: =A01
> =A0cpu2 (AP): APIC ID: =A02
> =A0cpu3 (AP/HT): APIC ID: =A03
>
> I will restart the test and see if this happens again.
>
I reproduced the previous problem on 10-CURRENT from r233917, on the
following platform (here running 8.2-RELEASE):
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 8.2-RELEASE #0: Thu Feb 17 02:41:51 UTC 2011
root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Atom(TM) CPU D525 @ 1.80GHz (1800.01-MHz K8-class CPU)
Origin =3D "GenuineIntel" Id =3D 0x106ca Family =3D 6 Model =3D 1c St=
epping =3D 10
Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PG=
E,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=3D0x40e31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM,MOVB=
E>
AMD Features=3D0x20100800<SYSCALL,NX,LM>
AMD Features2=3D0x1<LAHF>
TSC: P-state invariant
real memory =3D 2136539136 (2037 MB)
avail memory =3D 2043772928 (1949 MB)
ACPI APIC Table: <010312 APIC0947>
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 HTT threads
cpu0 (BSP): APIC ID: 0
cpu1 (AP/HT): APIC ID: 1
cpu2 (AP): APIC ID: 2
cpu3 (AP/HT): APIC ID: 3
Complete system freeze while running about 2400 threads. I had to
power cycle the system to get it back alive. I discussed a way to
debug this with attilio@ on freebsd-stable@, but still did not had
time to implement it.
regards,
- Arnaud
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