Date: Sun, 23 Feb 2003 17:16:42 +0200 From: ianf@za.uu.net To: FreeBSD-current@freebsd.org Subject: SIO interrupt level buffer overflows Message-ID: <E18mxru-00042N-00@brane.digs.iafrica.com>
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Hi
I've had a resurgence of these starting a few days ago. Basically
whenever there is fairly heavy IO (I mean as heavy as IO can get on
a COM port) the console starts spewing these messages.
[brane-dead] ~ # uptime
5:05PM up 1 day, 8:39, 1 user, load averages: 2.02, 2.10, 2.09
[brane-dead] ~ # grep "interrupt-level" /var/log/messages |tail
Feb 23 17:15:17 brane-dead kernel: sio1: 793 more interrupt-level buffer overflows (total 316848)
Feb 23 17:15:18 brane-dead kernel: sio1: 39 more interrupt-level buffer overflows (total 316887)
Feb 23 17:15:26 brane-dead kernel: sio1: 33 more interrupt-level buffer overflows (total 316920)
Feb 23 17:15:28 brane-dead kernel: sio1: 1 more interrupt-level buffer overflow (total 316921)
Feb 23 17:15:29 brane-dead kernel: sio1: 256 more interrupt-level buffer overflows (total 317177)
Feb 23 17:15:31 brane-dead kernel: sio1: 80 more interrupt-level buffer overflows (total 317257)
Feb 23 17:15:32 brane-dead kernel: sio1: 64 more interrupt-level buffer overflows (total 317321)
Feb 23 17:15:35 brane-dead kernel: sio1: 64 more interrupt-level buffer overflows (total 317385)
Feb 23 17:15:41 brane-dead kernel: sio1: 64 more interrupt-level buffer overflows (total 317449)
Feb 23 17:15:53 brane-dead kernel: sio1: 320 more interrupt-level buffer overflows (total 317769)
It's affecting throughput on my leased line by causing errors and
retransmissions.
[brane-dead] ~ # grep "HDLC errors" /var/log/ppp.log |tail
Feb 23 16:57:44 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 17, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 16:58:46 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 16, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 16:59:47 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 26, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 17:00:48 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 27, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 17:01:49 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 10, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 17:02:50 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 18, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 17:03:51 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 2, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 17:04:53 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 1, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 17:05:54 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 20, ADDR: 0, COMD: 0, PROTO: 0
Feb 23 17:06:55 brane-dead ppp[187]: Phase: deflink: HDLC errors -> FCS: 39, ADDR: 0, COMD: 0, PROTO: 0
I suspect the kernel isn't servicing the interrupts quickly enough.
Is there any chance this is related to making sio0 my console? Any
ideas? I know this was discussed about a year ago but that discussion
was inconclusive.
The system is SMP (dual Pii-266) using SCHED_4BSD without WITNESS.
dmesg.boot follows.
Ian
--
Ian Freislich
Copyright (c) 1992-2003 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 5.0-CURRENT #16: Sat Feb 22 08:20:17 SAST 2003
ianf@brane-dead.digs.iafrica.com:/usr/src/sys/i386/compile/BRANE-DEAD
Preloaded elf kernel "/boot/kernel/kernel" at 0xc0412000.
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (267.27-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x634 Stepping = 4
Features=0x80fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,MMX>
real memory = 201261056 (191 MB)
avail memory = 190816256 (181 MB)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
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
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcibios: BIOS version 2.10
Using $PIR table, 8 entries at 0xc00fdc60
pcib0: <Intel 82443LX (440 LX) host to PCI bridge> at pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
IOAPIC #0 intpin 16 -> irq 2
IOAPIC #0 intpin 17 -> irq 16
IOAPIC #0 intpin 18 -> irq 17
agp0: <Intel 82443LX (440 LX) host to PCI bridge> mem 0xe0000000-0xe3ffffff at device 0.0 on pci0
pcib1: <PCIBIOS PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xf000-0xf00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xd000-0xd01f irq 12 at device 7.2 on pci0
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
Timecounter "PIIX" frequency 3579545 Hz
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
xl0: <3Com 3c905-TX Fast Etherlink XL> port 0xd400-0xd43f irq 2 at device 8.0 on pci0
xl0: Ethernet address: 00:60:08:0b:2e:c8
miibus0: <MII bus> on xl0
nsphy0: <DP83840 10/100 media interface> on miibus0
nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcn0: <AMD PCnet/PCI 10/100BaseTX> port 0xd800-0xd81f mem 0xeb000000-0xeb00001f irq 16 at device 9.0 on pci0
pcn0: Ethernet address: 00:60:b0:b6:d9:ee
miibus1: <MII bus> on pcn0
lxtphy0: <LXT970 10/100 media interface> on miibus1
lxtphy0: 100baseFX, 100baseFX-FDX, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
de0: <Digital 21041 Ethernet> port 0xdc00-0xdc7f mem 0xeb002000-0xeb00207f irq 17 at device 10.0 on pci0
de0: DEC DE450-CA 21041 [10Mb/s] pass 1.1
de0: address 00:00:f8:30:dd:c2
ahc0: <Adaptec aic7880 Ultra SCSI adapter> port 0xe000-0xe0ff mem 0xeb001000-0xeb001fff irq 2 at device 12.0 on pci0
ahc0: Using left over BIOS settings
aic7880: Ultra Single Channel A, SCSI Id=7, 16/253 SCBs
orm0: <Option ROMs> at iomem 0xc8000-0xc87ff,0xc0000-0xc7fff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/16 bytes threshold
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sio0 at port 0x3f8-0x3ff irq 4 flags 0x90 on isa0
sio0: type 16550A, console
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0303> can't assign resources (port)
unknown: <PNP0a03> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0700> can't assign resources (port)
unknown: <PNP0401> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: routing 8254 via IOAPIC #0 intpin 2
Timecounters tick every 10.000 msec
ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to deny, logging unlimited
ad0: 4103MB <ST34342A> [8894/15/63] at ata0-master UDMA33
Waiting 15 seconds for SCSI devices to settle
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/ad0s1a
cd0 at ahc0 bus 0 target 4 lun 0
cd0: <YAMAHA CRW4260 1.0q> Removable CD-ROM SCSI-2 device
cd0: 3.300MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
cd1 at ahc0 bus 0 target 6 lun 0
cd1: <PIONEER CD-ROM DR-U12X 1.06> Removable CD-ROM SCSI-2 device
cd1: 10.000MB/s transfers (10.000MHz, offset 15)
cd1: Attempt to query device size failed: NOT READY, Medium not present
sio1: 151 more interrupt-level buffer overflows (total 151)
de0: enabling AUI port
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