Messages in this thread | | | Date | Wed, 13 Nov 2013 00:31:52 +0300 | From | Sergey Senozhatsky <> | Subject | Re: [libtraceevent] hrtimer_expire_entry unknown op '{' |
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On (11/05/13 08:15), Steven Rostedt wrote: > > Hello, > > > > libtraceevent reports ` unknown op '{' ' while processing hrtimer_expire_entry event > > Yes, we need to port the plugin code from trace-cmd to handle this and > other cases. It's a known issue. >
Hello Steven, sorry if I'm bothering you with already known issue.
I cloned trace-cmd from git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
and there seems to be problems with hrtimer events format.
# ./trace-cmd check-events trace-cmd: No such file or directory bad op token { bad op token { bad op token { bad op token { function is_writable_pte not defined function scsi_trace_parse_cdb not defined function scsi_trace_parse_cdb not defined function scsi_trace_parse_cdb not defined function scsi_trace_parse_cdb not defined function jiffies_to_msecs not defined function jiffies_to_msecs not defined unknown op '{' unknown op '{'
trivial strace-ing shows that 'unknown op' comes from hrtimer_expire_entry
stat("/sys/kernel/debug/tracing/events/timer/hrtimer_expire_entry/format", {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 open("/sys/kernel/debug/tracing/events/timer/hrtimer_expire_entry/format", O_RDONLY) = 5 read(5, "name: hrtimer_expire_entry\nID: 9"..., 8192) = 577 read(5, "", 8192) = 0 close(5) = 0 write(2, " ", 2) = 2 write(2, "unknown op '{'", 14) = 14 write(2, "\n", 1) = 1
./trace-cmd record -e timer ls /bin ./trace-cmd report
kworker/1:0-3925 [001] 1626.266585: hrtimer_cancel: hrtimer=0xffff880157c8df80 X-2175 [000] 1626.266585: hrtimer_cancel: hrtimer=0xffff880157c0df80 X-2175 [000] 1626.266586: hrtimer_expire_entry: [FAILED TO PARSE] hrtimer=0xffff880157c0df80 now=1625348004324 function=0xffffffff810cadf0 kworker/1:0-3925 [001] 1626.266586: hrtimer_expire_entry: [FAILED TO PARSE] hrtimer=0xffff880157c8df80 now=1625348004320 function=0xffffffff810cadf0 kworker/1:0-3925 [001] 1626.266591: hrtimer_expire_exit: hrtimer=0xffff880157c8df80 kworker/1:0-3925 [001] 1626.266592: hrtimer_start: [FAILED TO PARSE] hrtimer=0xffff880157c8df80 function=0xffffffff810cadf0 expires=1625352000000 softexpires=1625352000000 X-2175 [000] 1626.266593: hrtimer_expire_exit: hrtimer=0xffff880157c0df80 X-2175 [000] 1626.266594: hrtimer_start: [FAILED TO PARSE] hrtimer=0xffff880157c0df80 function=0xffffffff810cadf0 expires=1625352000000 softexpires=1625352000000 kworker/1:0-3925 [001] 1626.266596: timer_cancel: timer=0xffff880157c8ff28 kworker/1:0-3925 [001] 1626.266598: timer_expire_entry: timer=0xffff880157c8ff28 function=delayed_work_timer_fn now=4295298633 X-2175 [000] 1626.266599: timer_cancel: timer=0xffff880157c0ff28 X-2175 [000] 1626.266599: timer_expire_entry: timer=0xffff880157c0ff28 function=delayed_work_timer_fn now=4295298633
thank you,
-ss
> -- Steve > > > > > cat /sys/kernel/debug/tracing/events/timer/hrtimer_expire_entry/format > > > > name: hrtimer_expire_entry > > ID: 91 > > format: > > field:unsigned short common_type; offset:0; size:2; signed:0; > > field:unsigned char common_flags; offset:2; size:1; signed:0; > > field:unsigned char common_preempt_count; offset:3; size:1; signed:0; > > field:int common_pid; offset:4; size:4; signed:1; > > > > field:void * hrtimer; offset:8; size:8; signed:0; > > field:s64 now; offset:16; size:8; signed:1; > > field:void * function; offset:24; size:8; signed:0; > > > > print fmt: "hrtimer=%p function=%pf now=%llu", REC->hrtimer, REC->function, (unsigned long long)(((ktime_t) { .tv64 = REC->now }).tv64) > > > > > > -ss >
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