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Groups > linux.kernel > #1550967
| From | "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: INFO: rcu_sched self-detected stall on CPU |
| Date | 2017-01-04 17:20 +0100 |
| Message-ID | <sVWsa-72d-43@gated-at.bofh.it> (permalink) |
| References | <sVQwp-2U6-5@gated-at.bofh.it> <sVU70-5lr-39@gated-at.bofh.it> <sVUA2-5Oz-29@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Jan 04, 2017 at 09:16:31AM -0500, Steven Rostedt wrote: > On Wed, 4 Jan 2017 05:46:08 -0800 > "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote: > > > I suggest enabling tracing for timers with a goal of working out why > > the rcu_sched task is not being awakened regularly -- during a grace > > period, it should be awakened every three jiffies or so (depending on > > the value of HZ). > > Perhaps enable events for rcu, sched and irqs as well? Good point -- but you will need to build with CONFIG_RCU_TRACE=y to get most of the RCU events. Thanx, Paul
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Re: INFO: rcu_sched self-detected stall on CPU Steven Rostedt <rostedt@goodmis.org> - 2017-01-04 15:20 +0100
Re: INFO: rcu_sched self-detected stall on CPU Enrico Mioso <mrkiko.rs@gmail.com> - 2017-01-04 16:50 +0100
Re: INFO: rcu_sched self-detected stall on CPU "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-04 17:20 +0100
Re: INFO: rcu_sched self-detected stall on CPU Enrico Mioso <mrkiko.rs@gmail.com> - 2017-01-05 19:40 +0100
Re: INFO: rcu_sched self-detected stall on CPU "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-06 08:50 +0100
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