* Re: rlimits: Print more information when CPU/RT limits are exceeded [not found] <20170501232152.8142E661220@gitolite.kernel.org> @ 2017-05-02 3:12 ` Dave Jones 2017-05-04 4:38 ` Arun Raghavan 0 siblings, 1 reply; 3+ messages in thread From: Dave Jones @ 2017-05-02 3:12 UTC (permalink / raw) To: Linux Kernel Mailing List; +Cc: Arun Raghavan, Thomas Gleixner, Linus Torvalds On Mon, May 01, 2017 at 11:21:52PM +0000, Linux Kernel wrote: > Web: https://git.kernel.org/torvalds/c/e7ea7c9806a2681807257ea89085339d33f7fa0b > Commit: e7ea7c9806a2681807257ea89085339d33f7fa0b > Parent: 4495c08e84729385774601b5146d51d9e5849f81 > Refname: refs/heads/master > Author: Arun Raghavan <arun@arunraghavan.net> > AuthorDate: Wed Mar 1 20:23:09 2017 +0530 > Committer: Thomas Gleixner <tglx@linutronix.de> > CommitDate: Mon Mar 13 21:32:15 2017 +0100 > > rlimits: Print more information when CPU/RT limits are exceeded > > When a process is sent a SIGKILL because it exceeded CPU or RT limits, > the cause may not be obvious in userspace -- daemonised processes just > get killed, and even foreground process just see a 'Killed' message. The > lack of any information on why this might be happening in logs can be > confusing to users who are not aware of this mechanism. > > Add messages which dump the process name and tid in dmesg when a process > exceeds its CPU or RT limits (soft and hard) in order to make it clearer to > people debugging such issues. > > Signed-off-by: Arun Raghavan <arun@arunraghavan.net> > Link: http://lkml.kernel.org/r/20170301145309.27214-1-arun@arunraghavan.net > Signed-off-by: Thomas Gleixner <tglx@linutronix.de> This needs to be configurable, because this is really obnoxious.. [ 121.042170] RT Watchdog Timeout (hard): trinity-c40[7533] [ 125.670948] RT Watchdog Timeout (hard): trinity-c29[1612] [ 200.631968] CPU Watchdog Timeout (soft): trinity-c33[11454] [ 200.644308] CPU Watchdog Timeout (soft): trinity-c33[11454] [ 200.656551] CPU Watchdog Timeout (soft): trinity-c33[11454] [ 213.454504] CPU Watchdog Timeout (soft): trinity-c33[11454] [ 276.787116] CPU Watchdog Timeout (soft): trinity-c22[23943] [ 285.857773] CPU Watchdog Timeout (soft): trinity-c33[24908] [ 287.236710] CPU Watchdog Timeout (soft): trinity-c22[23943] [ 295.186400] CPU Watchdog Timeout (soft): trinity-c33[24908] [ 296.464352] CPU Watchdog Timeout (soft): trinity-c22[23943] [ 305.164011] CPU Watchdog Timeout (soft): trinity-c33[24908] [ 367.123564] CPU Watchdog Timeout (soft): trinity-c8[1472] [ 373.950321] CPU Watchdog Timeout (soft): trinity-c8[1472] [ 381.415054] CPU Watchdog Timeout (soft): trinity-c8[1472] [ 389.621759] CPU Watchdog Timeout (soft): trinity-c8[1472] [ 463.940996] CPU Watchdog Timeout (soft): trinity-c29[7725] [ 463.952215] CPU Watchdog Timeout (soft): trinity-c29[7725] [ 463.963306] CPU Watchdog Timeout (soft): trinity-c29[7725] [ 555.264401] RT Watchdog Timeout (hard): trinity-c58[19175] [ 610.536159] RT Watchdog Timeout (hard): trinity-c2[28363] [ 741.785688] CPU Watchdog Timeout (soft): trinity-c46[5034] [ 741.796600] CPU Watchdog Timeout (soft): trinity-c46[5034] [ 741.807384] CPU Watchdog Timeout (soft): trinity-c46[5034] [ 741.972679] CPU Watchdog Timeout (soft): trinity-c46[5034] [ 743.115630] CPU Watchdog Timeout (soft): trinity-c46[5034] [ 743.128628] CPU Watchdog Timeout (soft): trinity-c12[2803] [ 743.139032] CPU Watchdog Timeout (soft): trinity-c12[2803] [ 743.149276] CPU Watchdog Timeout (soft): trinity-c12[2803] [ 823.866183] CPU Watchdog Timeout (soft): trinity-c21[15684] [ 892.151230] CPU Watchdog Timeout (soft): trinity-c56[22668] [ 892.161239] CPU Watchdog Timeout (soft): trinity-c56[22668] [ 899.818894] CPU Watchdog Timeout (soft): trinity-c4[22072] [ 899.828718] CPU Watchdog Timeout (soft): trinity-c4[22072] [ 899.838439] CPU Watchdog Timeout (soft): trinity-c4[22072] [ 905.253660] CPU Watchdog Timeout (soft): trinity-c56[22668] [ 907.297573] CPU Watchdog Timeout (soft): trinity-c39[24134] [ 907.307170] CPU Watchdog Timeout (soft): trinity-c39[24134] [ 907.519560] CPU Watchdog Timeout (soft): trinity-c4[22072] [ 940.624120] RT Watchdog Timeout (hard): trinity-c34[30478] [ 959.189311] CPU Watchdog Timeout (soft): trinity-c61[31012] [ 968.873887] CPU Watchdog Timeout (soft): trinity-c61[31012] [ 980.305390] CPU Watchdog Timeout (soft): trinity-c61[31012] [ 992.532852] CPU Watchdog Timeout (soft): trinity-c61[31012] [ 1032.126118] CPU Watchdog Timeout (soft): trinity-c34[5861] [ 1036.723920] CPU Watchdog Timeout (soft): trinity-c34[5861] [ 1046.628487] CPU Watchdog Timeout (soft): trinity-c34[5861] [ 1054.169156] CPU Watchdog Timeout (soft): trinity-c34[5861] [ 1064.102718] CPU Watchdog Timeout (soft): trinity-c34[5861] [ 1076.722166] CPU Watchdog Timeout (soft): trinity-c34[5861] [ 1129.844831] CPU Watchdog Timeout (soft): trinity-c4[14714] [ 1134.980606] CPU Watchdog Timeout (soft): trinity-c4[14714] [ 1146.512098] CPU Watchdog Timeout (soft): trinity-c4[14714] [ 1158.420576] CPU Watchdog Timeout (soft): trinity-c4[14714] [ 1170.275054] CPU Watchdog Timeout (soft): trinity-c4[14714] Dave ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: rlimits: Print more information when CPU/RT limits are exceeded 2017-05-02 3:12 ` rlimits: Print more information when CPU/RT limits are exceeded Dave Jones @ 2017-05-04 4:38 ` Arun Raghavan 2017-05-04 13:32 ` Dave Jones 0 siblings, 1 reply; 3+ messages in thread From: Arun Raghavan @ 2017-05-04 4:38 UTC (permalink / raw) To: Dave Jones, Linux Kernel Mailing List; +Cc: Thomas Gleixner, Linus Torvalds On Tue, 2 May 2017, at 08:42 AM, Dave Jones wrote: > On Mon, May 01, 2017 at 11:21:52PM +0000, Linux Kernel wrote: > > Web: https://git.kernel.org/torvalds/c/e7ea7c9806a2681807257ea89085339d33f7fa0b > > Commit: e7ea7c9806a2681807257ea89085339d33f7fa0b > > Parent: 4495c08e84729385774601b5146d51d9e5849f81 > > Refname: refs/heads/master > > Author: Arun Raghavan <arun@arunraghavan.net> > > AuthorDate: Wed Mar 1 20:23:09 2017 +0530 > > Committer: Thomas Gleixner <tglx@linutronix.de> > > CommitDate: Mon Mar 13 21:32:15 2017 +0100 > > > > rlimits: Print more information when CPU/RT limits are exceeded > > > > When a process is sent a SIGKILL because it exceeded CPU or RT limits, > > the cause may not be obvious in userspace -- daemonised processes just > > get killed, and even foreground process just see a 'Killed' message. The > > lack of any information on why this might be happening in logs can be > > confusing to users who are not aware of this mechanism. > > > > Add messages which dump the process name and tid in dmesg when a process > > exceeds its CPU or RT limits (soft and hard) in order to make it clearer to > > people debugging such issues. > > > > Signed-off-by: Arun Raghavan <arun@arunraghavan.net> > > Link: http://lkml.kernel.org/r/20170301145309.27214-1-arun@arunraghavan.net > > Signed-off-by: Thomas Gleixner <tglx@linutronix.de> > > This needs to be configurable, because this is really obnoxious.. Is there an example of hos this is done elsewhere that I can work off? Thanks, Arun ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: rlimits: Print more information when CPU/RT limits are exceeded 2017-05-04 4:38 ` Arun Raghavan @ 2017-05-04 13:32 ` Dave Jones 0 siblings, 0 replies; 3+ messages in thread From: Dave Jones @ 2017-05-04 13:32 UTC (permalink / raw) To: Arun Raghavan; +Cc: Linux Kernel Mailing List, Thomas Gleixner, Linus Torvalds On Thu, May 04, 2017 at 10:08:16AM +0530, Arun Raghavan wrote: > On Tue, 2 May 2017, at 08:42 AM, Dave Jones wrote: > > On Mon, May 01, 2017 at 11:21:52PM +0000, Linux Kernel wrote: > > > Web: https://git.kernel.org/torvalds/c/e7ea7c9806a2681807257ea89085339d33f7fa0b > > > Commit: e7ea7c9806a2681807257ea89085339d33f7fa0b > > > Parent: 4495c08e84729385774601b5146d51d9e5849f81 > > > Refname: refs/heads/master > > > Author: Arun Raghavan <arun@arunraghavan.net> > > > AuthorDate: Wed Mar 1 20:23:09 2017 +0530 > > > Committer: Thomas Gleixner <tglx@linutronix.de> > > > CommitDate: Mon Mar 13 21:32:15 2017 +0100 > > > > > > rlimits: Print more information when CPU/RT limits are exceeded > > > > > > When a process is sent a SIGKILL because it exceeded CPU or RT limits, > > > the cause may not be obvious in userspace -- daemonised processes just > > > get killed, and even foreground process just see a 'Killed' message. The > > > lack of any information on why this might be happening in logs can be > > > confusing to users who are not aware of this mechanism. > > > > > > Add messages which dump the process name and tid in dmesg when a process > > > exceeds its CPU or RT limits (soft and hard) in order to make it clearer to > > > people debugging such issues. > > > > > > Signed-off-by: Arun Raghavan <arun@arunraghavan.net> > > > Link: http://lkml.kernel.org/r/20170301145309.27214-1-arun@arunraghavan.net > > > Signed-off-by: Thomas Gleixner <tglx@linutronix.de> > > > > This needs to be configurable, because this is really obnoxious.. > > Is there an example of hos this is done elsewhere that I can work off? The obvious one to me that comes to mind is /proc/sys/kernel/print-fatal-signals Dave ^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-05-02 3:12 ` rlimits: Print more information when CPU/RT limits are exceeded Dave Jones
2017-05-04 4:38 ` Arun Raghavan
2017-05-04 13:32 ` Dave Jones
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