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authorJiri Kosina <jkosina@suse.cz>2023-11-01 02:07:35 +0300
committerJiri Kosina <jkosina@suse.cz>2023-11-01 02:07:35 +0300
commit20cd569d7ee8fce24e8753f0f43af6c420557b1f (patch)
treef559cfda594846795aa51c99d96f92d8c912851a /tools/perf/examples/bpf/5sec.c
parent62cc9c3cb3ec1bf31cc116146185ed97b450836a (diff)
parenteeebfe6259ba2d5b0980eb7b0df384eb77e9e4f5 (diff)
downloadlinux-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.c53
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";