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Date:      13 Mar 2001 00:32:51 -0800
From:      psglenn@uswestmail.net
To:        freebsd-stable@freebsd.org
Subject:   Silo overflows
Message-ID:  <20010313083251.21417.cpmta@c000.sfo.cp.net>

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Hello,
I have been seeing many silo overflows lately.
 I'm running yesterday's 4.3 BETA and tracking stable.
I've seen some mail about this problem so I send this info.

bash-2.04$ uname -a
FreeBSD big.psf.his.org 4.3-BETA FreeBSD 4.3-BETA #7: Sat Mar 10 15:21:53 PST 2001     root@big.psf.his.org:/usr/src/sys/compile/BIG  i386
bash-2.04$ dmesg
Copyright (c) 1992-2001 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 4.3-BETA #7: Sat Mar 10 15:21:53 PST 2001
    root@big.psf.his.org:/usr/src/sys/compile/BIG
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 400910654 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (400.91-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x652  Stepping = 2
  Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory  = 234881024 (229376K bytes)
avail memory = 225132544 (219856K bytes)
Preloaded elf kernel "kernel" at 0xc0376000.
Pentium Pro MTRR support enabled
md0: Malloc disk
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <AcerLabs M5247 PCI-PCI(AGP Supported) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <Cirrus Logic GD5465 SVGA controller> at 0.0 irq 10
isab0: <AcerLabs M1533 portable PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <AcerLabs Aladdin ATA33 controller> port 0xffa0-0xffaf irq 0 at device 15.0 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
dc0: <82c169 PNIC 10/100BaseTX> port 0xde00-0xdeff mem 0xdfffff00-0xdfffffff irq 9 at device 18.0 on pci0
dc0: Ethernet address: **:**:**:**:**:**
miibus0: <MII bus> on dc0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
pcm0: <CMI8330> at port 0x530-0x537,0x388-0x38f irq 11 drq 0 on isa0
unknown: <PNP0000> can't assign resources
unknown: <PNP0303> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0400> can't assign resources
unknown: <PNP0700> can't assign resources
ad0: 8223MB <ST38410A> [16708/16/63] at ata0-master UDMA33
acd0: CDROM <ATAPI CDROM RH5.10> at ata1-slave using UDMA33
Mounting root from ufs:/dev/ad0s1a
dc0: failed to force tx and rx to idle state
dc0: failed to force tx and rx to idle state
dc0: failed to force tx and rx to idle state
sio1: 1 more silo overflow (total 1)
sio1: 1 more silo overflow (total 2)
sio1: 1 more silo overflow (total 3)

<snip>

sio1: 1 more silo overflow (total 353)
sio1: 1 more silo overflow (total 354)
sio1: 2 more silo overflows (total 356) 

The above info is after two days 8:40 uptime.
Ive been installing ports through my US-Robtics modem
10 or 20 meg per day or so.
I found somthing on netbsd's kernel that allowed tuning of the fifo in their
kernel but LINT kernel-config doesn't seem to mention anything
I was hoping to find somthing in sysctl I could tweak but no luck so far.

I think I've seen this since 4.0-RELEASE when I started running freebsd.

    There is a way that seemeth right unto a man, 
      but the end thereof are the ways of death.    Pv14:12,pv16:25

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