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Date:      Thu, 20 May 1999 16:34:40 -0400
From:      Kenn Martin <kmartin@infoteam.com>
To:        freebsd-stable@freebsd.org
Subject:   Debugging a stalled connection
Message-ID:  <19990520163439.B15580@infoteam.com>

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I have a number of machines running 3.2-STABLE with no problem, except one,
an "old" Pentium 200.  It has an Intel PRO/100+ Server Adapter (fxp0), two
IDE disks, and 1 IDE CDROM drive (dmesg below).  This also was happening
in later builds of 3.1-STABLE.

Large transfers, such as an NFS-mount installworld or a ftp get of a file
over approx 1MB, will stall regularly and indefinately.

No other operation appears to be affected and I can start another ssh
session with the "stalled" machine.

How should I go about debugging this problem?

thanks,
kenn

---8<---

May 16 23:07:50 andover /kernel: Copyright (c) 1992-1999 FreeBSD Inc.
May 16 23:07:50 andover /kernel: Copyright (c) 1982, 1986, 1989, 1991, 1993
May 16 23:07:50 andover /kernel: The Regents of the University of California. All ri
ghts reserved.
May 16 23:07:50 andover /kernel: FreeBSD 3.2-STABLE #0: Sun May 16 04:26:32 EDT 1999
May 16 23:07:50 andover /kernel: root@alysheba.infoteam.com:/usr/src/sys/compile/AND
OVER
May 16 23:07:51 andover /kernel: Timecounter "i8254"  frequency 1193182 Hz
May 16 23:07:51 andover /kernel: Timecounter "TSC"  frequency 198949163 Hz
May 16 23:07:51 andover /kernel: CPU: Pentium/P55C (198.95-MHz 586-class CPU)
May 16 23:07:51 andover /kernel: Origin = "GenuineIntel"  Id = 0x544  Stepping=4
May 16 23:07:51 andover /kernel: Features=0x8001bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MM
X>
May 16 23:07:51 andover /kernel: real memory  = 100663296 (98304K bytes)
May 16 23:07:51 andover /kernel: avail memory = 94982144 (92756K bytes)
May 16 23:07:51 andover /kernel: Preloaded elf kernel "kernel" at 0xc02b7000.
May 16 23:07:51 andover /kernel: Preloaded elf module "splash_bmp.ko" at 0xc02b709c.
May 16 23:07:51 andover /kernel: Preloaded splash_image_data "/boot/splash.bmp" at 0
xc02b7140.
May 16 23:07:51 andover /kernel: Probing for devices on PCI bus 0:
May 16 23:07:51 andover /kernel: chip0: <Host to PCI bridge (vendor=10b9 device=1521
)> rev 0x1c on pci0.0.0
May 16 23:07:51 andover /kernel: chip1: <PCI to ISA bridge (vendor=10b9 device=1523)
> rev 0x07 on pci0.2.0
May 16 23:07:51 andover /kernel: vga0: <ATI Mach64-GT graphics accelerator> rev 0x41
 int a irq 9 on pci0.4.0
May 16 23:07:51 andover /kernel: ide_pci0: <PCI IDE controller (busmaster capable)>
rev 0x01 int a irq 255 on pci0.5.0
May 16 23:07:51 andover /kernel: ncr0: <ncr 53c810 fast10 scsi> rev 0x02 int a irq 1
1 on pci0.14.0
May 16 23:07:51 andover /kernel: fxp0: <Intel EtherExpress Pro 10/100B Ethernet> rev
 0x08 int a irq 10 on pci0.15.0
May 16 23:07:51 andover /kernel: fxp0: Ethernet address 00:90:27:64:fc:a4
May 16 23:07:51 andover /kernel: Probing for devices on the ISA bus:
May 16 23:07:51 andover /kernel: sc0 on isa
May 16 23:07:51 andover /kernel: sc0: VGA color <16 virtual consoles, flags=0x0>
May 16 23:07:51 andover /kernel: atkbdc0 at 0x60-0x6f on motherboard
May 16 23:07:51 andover /kernel: atkbd0 irq 1 on isa
May 16 23:07:51 andover /kernel: sio0: configured irq 4 not in bitmap of probed irqs
 0
May 16 23:07:51 andover /kernel: sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
May 16 23:07:51 andover /kernel: sio0: type 8250
May 16 23:07:51 andover /kernel: fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
May 16 23:07:51 andover /kernel: fdc0: FIFO enabled, 8 bytes threshold
May 16 23:07:51 andover /kernel: fd0: 1.44MB 3.5in
May 16 23:07:51 andover /kernel: wdc0 at 0x1f0-0x1f7 irq 14 flags 0xa0ffa0ff on isa
May 16 23:07:51 andover /kernel: ide_pci: generic_dmainit 01f0:0: warning, IDE contr
oller timing not set
May 16 23:07:51 andover /kernel: wdc0: unit 0 (wd0): <QUANTUM BIGFOOT_CY2160A>, DMA,
 32-bit, multi-block-32
May 16 23:07:51 andover /kernel: wd0: 2014MB (4124736 sectors), 4092 cyls, 16 heads,
 63 S/T, 512 B/S
May 16 23:07:51 andover /kernel: wdc0: unit 1 (wd1): <Maxtor 7213 AT>, 32-bit, multi
-block-32
May 16 23:07:51 andover /kernel: wd1: 202MB (415264 sectors), 683 cyls, 16 heads, 38
 S/T, 512 B/S
May 16 23:07:51 andover /kernel: wdc1 at 0x170-0x177 irq 16 on isa
May 16 23:07:51 andover /kernel: wdc1: unit 1 (atapi): <NEC                 CD-ROM D
RIVE:285/3.12>, removable, dma, iordy
May 16 23:07:51 andover /kernel: acd0: drive speed 2067KB/sec, 128KB cache
May 16 23:07:51 andover /kernel: acd0: supported read types: CD-R, CD-DA
May 16 23:07:51 andover /kernel: acd0: Audio: play, 16 volume levels
May 16 23:07:51 andover /kernel: acd0: Mechanism: ejectable tray
May 16 23:07:51 andover /kernel: acd0: Medium: no/blank disc inside, unlocked
May 16 23:07:52 andover /kernel: vga0 at 0x3b0-0x3df maddr 0xa0000 msize 131072 on i
sa
May 16 23:07:52 andover /kernel: npx0 on motherboard
May 16 23:07:52 andover /kernel: npx0: INT 16 interface
May 16 23:07:52 andover /kernel: Intel Pentium detected, installing workaround for F
00F bug
May 16 23:07:52 andover /kernel: Waiting 4 seconds for SCSI devices to settle
May 16 23:07:52 andover /kernel: changing root device to wd0s1a
May 16 23:07:52 andover /kernel: stray irq 7
May 16 23:07:52 andover /kernel: stray irq 7
May 16 23:07:52 andover timed[112]: slave to alysheba.infoteam.com



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