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Diffstat (limited to 'tools/perf/examples/bpf/5sec.c')
| -rw-r--r-- | tools/perf/examples/bpf/5sec.c | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/tools/perf/examples/bpf/5sec.c b/tools/perf/examples/bpf/5sec.c deleted file mode 100644 index 65c4ff6892d9..000000000000 --- a/tools/perf/examples/bpf/5sec.c +++ /dev/null @@ -1,51 +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 <bpf/bpf.h> - -#define NSEC_PER_SEC 1000000000L - -int probe(hrtimer_nanosleep, rqtp)(void *ctx, int err, long long sec) -{ - return sec / NSEC_PER_SEC == 5ULL; -} - -license(GPL); |