Date: Thu, 26 Jan 2006 21:46:04 GMT From: Patrick Proniewski <patrick.proniewski@univ-lyon2.fr> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/92395: truss does not work properly, procfs looks like it's limited to 128 elements Message-ID: <200601262146.k0QLk4Qh036777@www.freebsd.org> Resent-Message-ID: <200601262150.k0QLo2Qa055921@freefall.freebsd.org>
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>Number: 92395
>Category: misc
>Synopsis: truss does not work properly, procfs looks like it's limited to 128 elements
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jan 26 21:50:02 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Patrick Proniewski
>Release: FreeBSD 5.4-RELEASE-p8 #0
>Organization:
Université Lyon 2
>Environment:
FreeBSD example.com 5.4-RELEASE-p8 FreeBSD 5.4-RELEASE-p8 #0: Sun Oct 16 17:12:30 CEST 2005 patpro@example.com:/usr/obj/usr/src/sys/PATPRO-20050829 i386
>Description:
The truss command is unable to function correctly on my system:
Bellow, I use the `ls` command as an example, other commands used with truss yield to the same results.
- some times it will return:
$ truss ls
truss: cannot open /proc/4509/mem: No such file or directory (This one it reproductible with `ktrace truss ls`)
such processes are stuck in state "D" : Marks a process in disk (or other short term, uninterruptible) wait.
patpro 57096 1 0.0 0.0 ttyp1 10:13PM D ls
patpro 57125 1 0.0 0.0 ttyp1 10:13PM D ls -al
patpro 57446 1 0.0 0.0 ttyp1 10:15PM D uname
- some times it will return:
$ truss ls
truss: PIOCWAIT: Input/output error (This one won't happen when the command is launched as `ktrace truss ls`)
of course, PROCFS is mounted (at boot time):
$ df procfs
Filesystem 1K-blocks Used Avail Capacity Mounted on
procfs 4 4 0 100% /proc
But this procfs behaves strangely too. It seems unable to contain more than 128 items :
$ ls -1 /proc/ | wc -l
128
$ ps aux | wc -l
207
Looks like a power of 2, to me. I think both problem might be related.
It has been mentioned on freebsd-questions, that it could be some sort of race condition between truss and the command it is supposed to monitor the activity of.
I can regain proper behaviour if I issue this type of command :
$ truss `which ls`
instead of
$ truss ls
`truss ls -al` gives good results most of the time, but not every times.
complete sysctl : http://boleskine.patpro.net/~patpro/sysctl.txt
kernel config :
machine i386
cpu I686_CPU
ident PATPRO-20050829
options SCHED_4BSD
options INET
options FFS
options SOFTUPDATES
options UFS_ACL
options UFS_DIRHASH
options MD_ROOT
options NFSCLIENT
options NFSSERVER
options NFS_ROOT
options MSDOSFS
options CD9660
options PROCFS
options PSEUDOFS
options GEOM_GPT
options COMPAT_43
options COMPAT_FREEBSD4
options SCSI_DELAY=15000
options KTRACE
options SYSVSHM
options SYSVMSG
options SYSVSEM
options _KPOSIX_PRIORITY_SCHEDULING
options KBD_INSTALL_CDEV
options AHC_REG_PRETTY_PRINT
options AHD_REG_PRETTY_PRINT
options ADAPTIVE_GIANT
options ALTQ
options ALTQ_CBQ
options ALTQ_RED
options ALTQ_RIO
options ALTQ_HFSC
options ALTQ_PRIQ
options ALTQ_NOPCC
options SMP
options MPTABLE_FORCE_HTT
device apic
device isa
device eisa
device pci
device fdc
device ata
device atadisk
device ataraid
device atapicd
device atapifd
device atapist
options ATA_STATIC_ID
device atkbdc
device atkbd
device psm
device vga
device splash
device sc
device agp
device npx
device pmtimer
device sio
device ppc
device ppbus
device ppi
device em
device miibus
device fxp
device ex
device loop
device mem
device io
device random
device ether
device tun
device pty
device md
device bpf
device uhci
device ohci
device ehci
device usb
device ugen
device uhid
device ukbd
hardware :
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2994.90-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf41 Stepping = 1
Features=0xbfebfbff<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>
Hyperthreading: 2 logical CPUs
real memory = 1072562176 (1022 MB)
avail memory = 1044230144 (995 MB)
ACPI APIC Table: <IntelR AWRDACPI>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
ioapic0: Changing APIC ID to 2
ioapic0 <Version 2.0> irqs 0-23 on motherboard
ioapic1 <Version 2.0> irqs 24-47 on motherboard
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <IntelR AWRDACPI> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 3.0 on pci0
pci1: <ACPI PCI bus> on pcib1
em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port
0xc000-0xc01f mem 0xf2000000-0xf201ffff irq 18 at device 1.0 on pci1
em0: Ethernet address: 00:30:48:83:ef:8c
em0: Speed:N/A Duplex:N/A
pcib2: <ACPI PCI-PCI bridge> at device 28.0 on pci0
pci2: <ACPI PCI bus> on pcib2
uhci0: <UHCI (generic) USB controller> port 0xe100-0xe11f irq 16 at
device 29.0 on pci0
usb0: <UHCI (generic) 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
uhci1: <UHCI (generic) USB controller> port 0xe000-0xe01f irq 19 at
device 29.1 on pci0
usb1: <UHCI (generic) USB controller> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
pci0: <base peripheral> at device 29.4 (no driver attached)
pci0: <base peripheral, interrupt controller> at device 29.5 (no
driver attached)
ehci0: <EHCI (generic) USB 2.0 controller> mem 0xf2100000-0xf21003ff
irq 23 at device 29.7 on pci0
usb2: EHCI version 1.0
usb2: companion controllers, 2 ports each: usb0 usb1
usb2: <EHCI (generic) USB 2.0 controller> on ehci0
usb2: USB revision 2.0
uhub2: Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: 4 ports with 4 removable, self powered
pcib3: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci3: <ACPI PCI bus> on pcib3
pci3: <display, VGA> at device 9.0 (no driver attached)
em1: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port
0xd100-0xd13f mem 0xf1000000-0xf101ffff irq 19 at device 10.0 on pci3
em1: Ethernet address: 00:30:48:83:ef:8d
em1: Speed:N/A Duplex:N/A
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel 6300ESB UDMA100 controller> port 0xf000-0xf00f,
0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
atapci1: <Intel 6300ESB SATA150 controller> port 0xe600-0xe60f,
0xe500-0xe503,0xe400-0xe407,0xe300-0xe303,0xe200-0xe207 irq 18 at
device 31.2 on pci0
ata2: channel #0 on atapci1
ata3: channel #1 on atapci1
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_tz0: <Thermal Zone> on acpi0
fdc0: <floppy drive controller> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on
acpi0
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10
on acpi0
sio0: type 16550A
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
ppc0: <Standard parallel printer port> port 0x778-0x77b,0x378-0x37f
irq 7 on acpi0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
ppi0: <Parallel I/O> on ppbus0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
pmtimer0 on isa0
orm0: <ISA Option ROM> at iomem 0xc0000-0xc7fff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounters tick every 10.000 msec
em0: Link is up 100 Mbps Full Duplex
ad4: 78167MB <Maxtor 6Y080M0/YAR51HW0> [158816/16/63] at ata2-master SATA150
ad6: 194481MB <Maxtor 6L200M0/BANC1E00> [395136/16/63] at ata3-master SATA150
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/ad4s1a
em0: Link is up 100 Mbps Full Duplex
Accounting enabled
pflog0: promiscuous mode enabled
em0: Link is up 100 Mbps Full Duplex
em0: Link is up 100 Mbps Full Duplex
Feel free to ask for other details, or tests.
>How-To-Repeat:
no idea. Most people won't have the problem, few have it, the common denominator is still to find.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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