mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-13 22:14:20 +08:00
27702bcfe8
So now we can use: # perf trace -e pkey_* 532.784 ( 0.006 ms): pkey/16018 pkey_alloc(init_val: DISABLE_WRITE) = -1 EINVAL Invalid argument 532.795 ( 0.004 ms): pkey/16018 pkey_mprotect(start: 0x7f380d0a6000, len: 4096, prot: READ|WRITE, pkey: -1) = 0 532.801 ( 0.002 ms): pkey/16018 pkey_free(pkey: -1 ) = -1 EINVAL Invalid argument ^C[root@jouet ~]# Or '-e epoll*', '-e *msg*', etc. Combining syscall names with perf events, tracepoints, etc, continues to be valid, i.e. this is possible: # perf probe -L sys_nanosleep <SyS_nanosleep@/home/acme/git/linux/kernel/time/hrtimer.c:0> 0 SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, struct timespec __user *, rmtp) { struct timespec64 tu; 5 if (get_timespec64(&tu, rqtp)) 6 return -EFAULT; if (!timespec64_valid(&tu)) 9 return -EINVAL; 11 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; 12 current->restart_block.nanosleep.rmtp = rmtp; 13 return hrtimer_nanosleep(&tu, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } # perf probe my_probe="sys_nanosleep:12 rmtp" Added new event: probe:my_probe (on sys_nanosleep:12 with rmtp) You can now use it in all perf tools, such as: perf record -e probe:my_probe -aR sleep 1 # # perf trace -e probe:my_probe/max-stack=5/,*sleep sleep 1 0.427 ( 0.003 ms): sleep/16690 nanosleep(rqtp: 0x7ffefc245090) ... 0.430 ( ): probe:my_probe:(ffffffffbd112923) rmtp=0) sys_nanosleep ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) return_from_SYSCALL_64 ([kernel.kallsyms]) __nanosleep_nocancel (/usr/lib64/libc-2.25.so) 0.427 (1000.208 ms): sleep/16690 ... [continued]: nanosleep()) = 0 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-elycoi8wy6y0w9dkj7ox1mzz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
---|---|---|
.. | ||
android.txt | ||
asciidoc.conf | ||
Build.txt | ||
callchain-overhead-calculation.txt | ||
examples.txt | ||
intel-bts.txt | ||
intel-pt.txt | ||
itrace.txt | ||
jit-interface.txt | ||
jitdump-specification.txt | ||
Makefile | ||
manpage-1.72.xsl | ||
manpage-base.xsl | ||
manpage-bold-literal.xsl | ||
manpage-normal.xsl | ||
manpage-suppress-sp.xsl | ||
perf-annotate.txt | ||
perf-archive.txt | ||
perf-bench.txt | ||
perf-buildid-cache.txt | ||
perf-buildid-list.txt | ||
perf-c2c.txt | ||
perf-config.txt | ||
perf-data.txt | ||
perf-diff.txt | ||
perf-evlist.txt | ||
perf-ftrace.txt | ||
perf-help.txt | ||
perf-inject.txt | ||
perf-kallsyms.txt | ||
perf-kmem.txt | ||
perf-kvm.txt | ||
perf-list.txt | ||
perf-lock.txt | ||
perf-mem.txt | ||
perf-probe.txt | ||
perf-record.txt | ||
perf-report.txt | ||
perf-sched.txt | ||
perf-script-perl.txt | ||
perf-script-python.txt | ||
perf-script.txt | ||
perf-stat.txt | ||
perf-test.txt | ||
perf-timechart.txt | ||
perf-top.txt | ||
perf-trace.txt | ||
perf.data-file-format.txt | ||
perf.txt | ||
perfconfig.example | ||
tips.txt |