Messages in this thread | | | Subject | Re: TREE_SRCU slows hotplug by factor ~16 | From | Mike Galbraith <> | Date | Mon, 24 Apr 2017 10:43:02 +0200 |
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On Mon, 2017-04-24 at 09:35 +0200, Mike Galbraith wrote:
> # tracer: nop > # > # entries-in-buffer/entries-written: 229332/229332 #P:8 > # > # _-----=> irqs-off > # / _----=> need-resched > # | / _---=> hardirq/softirq > # || / _--=> preempt-depth > # ||| / delay > # TASK-PID CPU# |||| TIMESTAMP FUNCTION > # | | | |||| | | > stress-cpu-hotp-2443 [004] .... 144.123608: synchronize_srcu: enter > stress-cpu-hotp-2443 [004] .... 144.123610: call_srcu: enter > stress-cpu-hotp-2443 [004] .... 144.123612: call_srcu: exit > stress-cpu-hotp-2443 [005] .... 144.139528: synchronize_srcu: exit
I probably could have sent a LOT less trace.
classic:
# tracer: nop # # entries-in-buffer/entries-written: 114688/114688 #P:8 # # _-----=> irqs-off # / _----=> need-resched # | / _---=> hardirq/softirq # || / _--=> preempt-depth # ||| / delay # TASK-PID CPU# |||| TIMESTAMP FUNCTION # | | | |||| | | stress-cpu-hotp-4337 [007] .... 174.082801: synchronize_srcu: enter stress-cpu-hotp-4337 [007] .... 174.082802: synchronize_srcu: exit stress-cpu-hotp-4337 [007] .... 174.082896: synchronize_srcu: enter stress-cpu-hotp-4337 [007] .... 174.082896: synchronize_srcu: exit stress-cpu-hotp-4337 [007] .... 174.082975: synchronize_srcu: enter stress-cpu-hotp-4337 [007] .... 174.082975: synchronize_srcu: exit stress-cpu-hotp-4337 [007] .... 174.083051: synchronize_srcu: enter stress-cpu-hotp-4337 [007] .... 174.083051: synchronize_srcu: exit ....
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