Date: Thu, 10 May 2001 09:58:24 +1000 From: nigel@aims.com.au To: <FreeBSD-gnats-submit@freebsd.org> Subject: kern/27237: Problems with vr watchdog in FreeBSD 4.2 Message-ID: <200105092354.f49NsBA76099@twister.aims.private>
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>Number: 27237
>Category: kern
>Synopsis: Watchdog Timeouts under EXCESSIVE load
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed May 09 17:00:05 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Nigel Weeks
>Release: FreeBSD 4.2-RELEASE i386
>Organization:
AIMS
>Environment:
Ok. DMesg bits as follows
This machine has two celeron 366 processors, slightly overclocked.
But the PCI's are still running at 66MHz...
FreeBSD 4.2-RELEASE #0: Thu Jan 25 12:38:29 EST 2001
nigel@twister.aims.private:/usr/obj/usr/src/sys/TWISTER
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (412.50-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x665 Stepping = 5
Features=0x183fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,
CMOV,PAT,PSE36,MMX,FXSR>
real memory = 134152192 (131008K bytes)
config> q
avail memory = 127320064 (124336K bytes)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
FreeBSD/SMP: Multiprocessor motherboard
cpu0 (BSP): apic id: 0, version: 0x00040011, at 0xfee00000
cpu1 (AP): apic id: 1, version: 0x00040011, at 0xfee00000
io0 (APIC): apic id: 2, version: 0x00170011, at 0xfec00000
Preloaded elf kernel "kernel" at 0xc0341000.
NIC stuff:
vr0: <VIA VT3043 Rhine I 10/100BaseTX> port 0xe400-0xe47f mem
0xd5400000-0xd540007f irq 19 at device 11.0 on pci0
vr0: Ethernet address: 00:50:ba:ab:b9:6f
miibus0: <MII bus> on vr0
amphy0: <DM9101 10/100 media interface> on miibus0
amphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
>Description:
Bloody Hell you guys write some awesome code.
This machine performs soooo well.
One Problem.
Under extreme network load, /var/log/messages reports
May 10 09:41:35 twister /kernel: vr0: watchdog timeout
Just before this happens, the network freezes for around 30 seconds.
It does come right, but for a webserver doing 5million page views/day, it's
a headache for users
>How-To-Repeat:
Easy. Put load on the vr driver.
The problem is most severe when a 10MBit client requests hard and fast from
the 100MBit vr card.
The switch is a good one, and no other machines(even Linux - eeew) have no
troubles.
BUT - no other ones are doing 5Mega-pages either.
>Fix:
No idea.
>Release-Note:
>Audit-Trail:
>Unformatted:
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