On Fri, 14 Jan 2022 01:37:08 +0000
"Chen, Hongzhan" <hongzhan.chen@xxxxxxxxx> wrote:
>From your other email:
> root@ecs-xenomai-isar:~# cat /sys/kernel/debug/tracing/events/cobalt_posix/cobalt_pthread_create/format
> name: cobalt_pthread_create
> ID: 628
> 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:unsigned long pth; offset:8; size:8; signed:0;
> field:int policy; offset:16; size:4; signed:1;
> field:__data_loc char[] param_ex; offset:20; size:4; signed:1;
>
> print fmt: "pth=%p policy=%s param=' %s '", (void *)REC->pth, __print_symbolic(REC->policy,
> {0, "normal"}, {1, "fifo"}, {2, "rr"}, {11, "tp"}, {12, "quota"}, {10, "sporadic"}, {42, "cobalt"},
> {43, "weak"}), cobalt_trace_parse_sched_params(p, REC->policy, (struct sched_param_ex *)(__get_dynamic_array(param_ex)))
>
> [2]:
> smokey-752 [000] d.~2 7970.727466: cobalt_pthread_getschedparam: pth=000000009bbc7fe0 policy=fifo param={ priority=50 }
> smokey-762 [000] .... 7970.727492: cobalt_pthread_create: pth=00000000983468a5 policy=quota param={ priority=1, group=0 }
> Following is two dumps, please check:
>
> smokey-447 [000] 320.193156: cobalt_pthread_create: 74 02 00 00 bf 01 00 00 40 37 4b aa ab 7f 00 00 00 00 00 00 18 00 38 00 00 00 00 00 fe 7f 00 00 60 c3 24 90 ff ff ff ff 5c 81 21 90 ff ff ff ff d8 bd 8c 80 90 c1 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
common_type: 0x0274 = 628 (matches the ID)
common_flags: 00
common_preempt_count: 00
common_pid: 0x000001bf : 447
pth: 0x00007fabaa4b3f40 (whatever that is)
policy: 0x00000000
param_ex: 0x00180038 (offset = 0x38 (56) len=0x18 (24)
Hmm, the offset points to that set of zeros at the end.
How was this event created?
> smokey-449 [000] 320.196623: cobalt_pthread_create: 74 02 00 00 c1 01 00 00 00 e7 6e a9 ab 7f 00 00 01 00 00 00 18 00 38 00 01 00 00 00 30 00 00 00 20 7c 82 77 fe 7f 00 00 60 7b 82 77 fe 7f 00 00 00 2b 89 18 55 a6 fa ba 40 37 4b aa ab 7f 00 00 3e 3d e2 00 7f 55 00 00 d0 7b 82 77 fe 7f 00 00
Although the above has content for that:
"40 37 4b aa ab 7f 00 00 3e 3d e2 00 7f 55 00 00 d0 7b 82 77 fe 7f 00 00"
-- Steve
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