Ubuntu
linux-source-2.6.17 package

[Edgy] i915_emit_cmds mega-spamming of syslogd, klogd - using 100% cpu

Bug #64970 reported by skroll on 2006-10-10

This bug report is a duplicate of: Bug #65000: System Logs fill up with i915 errors (1GB per 20 min.). Edit Remove

Affects		Status	Importance	Assigned to	Milestone
	linux-source-2.6.17 (Ubuntu)	Invalid	Undecided	Unassigned

Bug Description

Currently, after updates done to edgy on 10/9/06, syslogd and klogd are eating up all CPU cycles. The system is extremely sluggish. Once these processes are killed, everything runs fine. Dmesg reports a ton of errors with the i915 graphics adapter, which are mostly variations of:

[17181284.716000] validate_cmd( 54f00006(2) ): 8
[17181284.716000] i915_emit_cmds(365)
[17181284.716000] i915_emit_cmds(369)

See original description

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ruffneckc (ruffneckc) wrote on 2006-10-10:

+1 here.

My CPU is working overtime and here are the culprits. The top command revealed the following:

[PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

3810 root 16 0 1728 516 420 S 21.8 0.0 4:02.02 dd
3784 root 16 0 1652 620 500 R 18.5 0.0 3:13.49 syslogd
3812 klog 15 0 2428 1312 384 S 3.3 0.1 0:44.97 klogd

As you can see the CPU is being gobbled my those 3 programs that started running after I got the latest kernel updates and restarted.

EDIT: When I did a ps -ef on PID 3810 this is what came up:

ps -ef | grep 3810
root 3810 1 15 18:32 ? 00:04:03 /bin/dd bs 1 if /proc/kmsg of /var/run/klogd/kmsg

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ruffneckc (ruffneckc) wrote on 2006-10-10:

This is copy/similar to Bug #64972.

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Caroline Ford (secretlondon) wrote on 2006-10-10:

Confirmed by ruffneckc

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Caroline Ford (secretlondon) wrote on 2006-10-10:

We need some more information. (see https://wiki.ubuntu.com/DebuggingKernelProblems).

Can we get the output of the following 3 commands, attached as files.

    dmesg > dmesg.log
    lspci -vv > lspci-vv.log
    lspci -vvn > lspci-vvn.log

(For clarification the commands passed to lspci are v v for very verbose output and v v n for very verbose numerical output. The > symbol instructs that the output of the commannd be saved in the stated .log file.)

Changed in linux-source-2.6.17:
status:	Confirmed → Needs Info

saads (shakhshir) on 2006-10-10

description:

updated

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skroll (skroll) wrote on 2006-10-10:

dmesg.log Edit (118.8 KiB, text/plain)

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skroll (skroll) wrote on 2006-10-10:

lspci-vv.log Edit (8.5 KiB, text/plain)

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skroll (skroll) wrote on 2006-10-10:

lspci-vvn.log Edit (7.1 KiB, text/plain)

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michelem (michele-marcucci) wrote on 2006-10-10:

dmesg.log Edit (103.5 KiB, text/plain)

This is mine with the same problem:

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michelem (michele-marcucci) wrote on 2006-10-10:

lspci-vv.log Edit (9.3 KiB, text/plain)

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michelem (michele-marcucci) wrote on 2006-10-10:

#10

lspci-vvn.log Edit (7.7 KiB, text/plain)

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Robert Nasiadek (robzon) wrote on 2006-10-10:

#11

dmesg.log Edit (118.8 KiB, text/plain)

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Robert Nasiadek (robzon) wrote on 2006-10-10:

#12

lspci-vv.log Edit (8.9 KiB, text/plain)

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Robert Nasiadek (robzon) wrote on 2006-10-10:

#13

lspci-vvn.log Edit (7.1 KiB, text/plain)

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José P Valdés (sevmpe-deactivatedaccount) wrote on 2006-10-10:

#14

dmesg.log Edit (77.6 KiB, text/plain)

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José P Valdés (sevmpe-deactivatedaccount) wrote on 2006-10-10:

#15

lspci-vv.log Edit (6.9 KiB, text/plain)

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José P Valdés (sevmpe-deactivatedaccount) wrote on 2006-10-10:

#16

lspci-vvn.log Edit (5.4 KiB, text/plain)

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Nic (ntetreau) wrote on 2006-10-10:

#17

Log files: gmesg, lspci-vv & lspci-vvn Edit (4.0 KiB, application/x-tar)

Same problem here:

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Dan (danser) wrote on 2006-10-10:

#18

dmesg, lspci -vv, lspci -vvn Edit (7.9 KiB, application/x-tar)

Don't know if you want more reports, but here's one. For me, it works smoothly until I try to do any GLX operations -- in the attached dmesg is the result of running glxinfo.

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Christian Göbel (christiangoebel) wrote on 2006-10-10:

#19

See here for the related thread on the forum:
http://www.ubuntuforums.org/showthread.php?t=274386

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Jarrett Pettigrew (drfunk-deactivatedaccount) wrote on 2006-10-10:

#20

dmesg.log, lspci-vv.log, lspci-vvn.log Edit (4.0 KiB, application/x-tar)

I did not get the i915 cmds erros in dmesg until i started beryl-manager, however the load on my system was above average before starting beryl. I've also noticed quite a bit of sluggishness.

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ruffneckc (ruffneckc) wrote on 2006-10-10:

#21

Just updated to 2.6.17-10.30 and everything seems to be working fine. Thanks for the quick patch guys/gals!

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skroll (skroll) wrote on 2006-10-10:

#22

Confirming 2.6.17-10.30 fixes the problem.

Revision history for this message

Launchpad Janitor (janitor) wrote on 2007-09-21:

#23

[Expired for linux-source-2.6.17 (Ubuntu) because there has been no activity for 60 days.]

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[Edgy] i915_emit_cmds mega-spamming of syslogd, klogd - using 100% cpu

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linux-source-2.6.17 package