Re: Perf record format portability
From: Dmitry Antipov
Date: Thu May 31 2012 - 04:48:11 EST
On 05/29/2012 07:10 PM, Arnaldo Carvalho de Melo wrote:
I haven't tested this, but libtraceevent is now in, perhaps it works for
you now? Can you check?
It doesn't work. Attempt to do 'perf report' on ARM for the data collected on
x86 shows 'unknown:unknown' for event names (see report_x86_on_ARM.txt),
and 'perf report' on x86 for the data collected on ARM shows invalid event names
(see report_ARM_on_x86.txt).
Dmitry
# ========
# captured on: Thu May 31 08:15:47 2012
# hostname : notebook
# os release : 3.3.7-1.fc16.x86_64
# perf version : 3.4.9208.gaf56e0
# arch : x86_64
# nrcpus online : 4
# nrcpus avail : 4
# cpudesc : Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz
# cpuid : GenuineIntel,6,42,7
# total memory : 3934652 kB
# cmdline : /tmp/perf record -a -R -f -m 8192 -c 1 -e sched:sched_switch -e sched:sched_process_exit -e sched:sched_process_fork -e sched:sched_wakeup -e sched:sched_migrate_task /bin/ls -la /
# event : name = sched:sched_switch, type = 2, config = 0x117, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 45, 46, 47, 48 }
# event : name = sched:sched_process_exit, type = 2, config = 0x114, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 49, 50, 51, 52 }
# event : name = sched:sched_process_fork, type = 2, config = 0x111, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 53, 54, 55, 56 }
# event : name = sched:sched_wakeup, type = 2, config = 0x119, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 57, 58, 59, 60 }
# event : name = sched:sched_migrate_task, type = 2, config = 0x116, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 61, 62, 63, 64 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# ========
#
# Samples: 223 of event 'unknown:unknown'
# Event count (approx.): 223
#
# Overhead Command Shared Object Symbol
# ........ ........... ................. ..............
#
25.56% ls [kernel.kallsyms] [k] __schedule
25.11% swapper [kernel.kallsyms] [k] __schedule
24.66% kworker/1:1 [kernel.kallsyms] [k] __schedule
23.77% urxvt [kernel.kallsyms] [k] __schedule
0.45% perf [kernel.kallsyms] [k] __schedule
0.45% migration/2 [kernel.kallsyms] [k] __schedule
# Samples: 1 of event 'unknown:unknown'
# Event count (approx.): 1
#
# Overhead Command Shared Object Symbol
# ........ ....... ................. ...........
#
100.00% ls [kernel.kallsyms] [k] do_exit
# Samples: 0 of event 'unknown:unknown'
# Event count (approx.): 0
#
# Overhead Command Shared Object Symbol
# ........ ....... ............. ......
#
# Samples: 138 of event 'unknown:unknown'
# Event count (approx.): 138
#
# Overhead Command Shared Object Symbol
# ........ ........... ................. ..................
#
60.87% ls [kernel.kallsyms] [k] ttwu_do_wakeup
38.41% kworker/1:1 [kernel.kallsyms] [k] ttwu_do_wakeup
0.72% perf [kernel.kallsyms] [k] ttwu_do_wakeup
# Samples: 2 of event 'unknown:unknown'
# Event count (approx.): 2
#
# Overhead Command Shared Object Symbol
# ........ ........... ................. ................
#
50.00% perf [kernel.kallsyms] [k] set_task_cpu
50.00% migration/2 [kernel.kallsyms] [k] set_task_cpu
#
# (For a higher level overview, try: perf report --sort comm,dso)
#
# ========
# captured on: Thu May 31 12:19:45 2012
# hostname : linaro-developer
# os release : 3.4.0+
# perf version : 3.4.0
# arch : armv7l
# nrcpus online : 2
# nrcpus avail : 2
# cpudesc : ARMv7 Processor rev 2 (v7l)
# total memory : 1022872 kB
# cmdline : /usr/bin/perf record -a -R -f -m 8192 -c 1 -e sched:sched_switch -e sched:sched_process_exit -e sched:sched_process_fork -e sched:sched_wakeup -e sched:sched_migrate_task /bin/ls -la /
# event : name = sched:sched_switch, type = 2, config = 0x37, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 11, 12 }
# event : name = sched:sched_process_exit, type = 2, config = 0x34, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 13, 14 }
# event : name = sched:sched_process_fork, type = 2, config = 0x31, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 15, 16 }
# event : name = sched:sched_wakeup, type = 2, config = 0x39, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 17, 18 }
# event : name = sched:sched_migrate_task, type = 2, config = 0x36, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 19, 20 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# ========
#
# Samples: 148 of event 'syscalls:sys_exit_unshare'
# Event count (approx.): 148
#
# Overhead Command Shared Object Symbol
# ........ ........... ................ ......
#
38.51% ls [unknown] [.] 0000000000000000
37.84% kworker/1:1 [unknown] [.] 0000000000000000
12.16% swapper [unknown] [.] 0000000000000000
10.81% sshd [unknown] [.] 0000000000000000
0.68% perf [unknown] [.] 0000000000000000
# Samples: 1 of event 'raw_syscalls:sys_exit'
# Event count (approx.): 1
#
# Overhead Command Shared Object Symbol
# ........ ....... ................ ......
#
100.00% ls [unknown] [.] 0000000000000000
# Samples: 0 of event 'syscalls:sys_exit_mmap'
# Event count (approx.): 0
#
# Overhead Command Shared Object Symbol
# ........ ....... ............. ......
#
# Samples: 103 of event 'syscalls:sys_exit_set_tid_address'
# Event count (approx.): 103
#
# Overhead Command Shared Object Symbol
# ........ ........... ................ ......
#
80.58% ls [unknown] [.] 0000000000000000
15.53% kworker/1:1 [unknown] [.] 0000000000000000
1.94% sshd [unknown] [.] 0000000000000000
0.97% swapper [unknown] [.] 0000000000000000
0.97% perf [unknown] [.] 0000000000000000
# Samples: 1 of event 'mce:mce_record'
# Event count (approx.): 1
#
# Overhead Command Shared Object Symbol
# ........ ....... ................ ......
#
100.00% swapper [unknown] [.] 0000000000000000
#
# (For a higher level overview, try: perf report --sort comm,dso)
#