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author | Jiri Kosina <jkosina@suse.cz> | 2023-11-01 02:07:35 +0300 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2023-11-01 02:07:35 +0300 |
commit | 20cd569d7ee8fce24e8753f0f43af6c420557b1f (patch) | |
tree | f559cfda594846795aa51c99d96f92d8c912851a /tools/perf/examples/bpf/5sec.c | |
parent | 62cc9c3cb3ec1bf31cc116146185ed97b450836a (diff) | |
parent | eeebfe6259ba2d5b0980eb7b0df384eb77e9e4f5 (diff) | |
download | linux-20cd569d7ee8fce24e8753f0f43af6c420557b1f.tar.xz |
Merge branch 'for-6.7/config_pm' into for-linus
- #ifdef CONFIG_PM removal from HID code (Thomas Weißschuh)
Diffstat (limited to 'tools/perf/examples/bpf/5sec.c')
-rw-r--r-- | tools/perf/examples/bpf/5sec.c | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/tools/perf/examples/bpf/5sec.c b/tools/perf/examples/bpf/5sec.c deleted file mode 100644 index 3bd7fc17631f..000000000000 --- a/tools/perf/examples/bpf/5sec.c +++ /dev/null @@ -1,53 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - Description: - - . Disable strace like syscall tracing (--no-syscalls), or try tracing - just some (-e *sleep). - - . Attach a filter function to a kernel function, returning when it should - be considered, i.e. appear on the output. - - . Run it system wide, so that any sleep of >= 5 seconds and < than 6 - seconds gets caught. - - . Ask for callgraphs using DWARF info, so that userspace can be unwound - - . While this is running, run something like "sleep 5s". - - . If we decide to add tv_nsec as well, then it becomes: - - int probe(hrtimer_nanosleep, rqtp->tv_sec rqtp->tv_nsec)(void *ctx, int err, long sec, long nsec) - - I.e. add where it comes from (rqtp->tv_nsec) and where it will be - accessible in the function body (nsec) - - # perf trace --no-syscalls -e tools/perf/examples/bpf/5sec.c/call-graph=dwarf/ - 0.000 perf_bpf_probe:func:(ffffffff9811b5f0) tv_sec=5 - hrtimer_nanosleep ([kernel.kallsyms]) - __x64_sys_nanosleep ([kernel.kallsyms]) - do_syscall_64 ([kernel.kallsyms]) - entry_SYSCALL_64 ([kernel.kallsyms]) - __GI___nanosleep (/usr/lib64/libc-2.26.so) - rpl_nanosleep (/usr/bin/sleep) - xnanosleep (/usr/bin/sleep) - main (/usr/bin/sleep) - __libc_start_main (/usr/lib64/libc-2.26.so) - _start (/usr/bin/sleep) - ^C# - - Copyright (C) 2018 Red Hat, Inc., Arnaldo Carvalho de Melo <acme@redhat.com> -*/ - -#include <linux/bpf.h> -#include <bpf/bpf_helpers.h> - -#define NSEC_PER_SEC 1000000000L - -SEC("hrtimer_nanosleep=hrtimer_nanosleep rqtp") -int hrtimer_nanosleep(void *ctx, int err, long long sec) -{ - return sec / NSEC_PER_SEC == 5ULL; -} - -char _license[] SEC("license") = "GPL"; |