diff options
Diffstat (limited to 'tools/perf/Documentation/perf-trace.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-trace.txt | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 6e0cc50bbc13..973fede403a0 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -150,6 +150,11 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. To be used with -s or -S, to show stats for the errnos experienced by syscalls, using only this option will trigger --summary. +--summary-mode=mode:: + To be used with -s or -S, to select how to show summary. By default it'll + show the syscall summary by thread. Possible values are: thread, total, + cgroup. + --tool_stats:: Show tool stats such as number of times fd->pathname was discovered thru hooking the open syscall return + vfs_getname or via reading /proc/pid/fd, etc. @@ -233,13 +238,16 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. the same beautifiers used in the strace-like enter+exit lines to augment the tracepoint arguments. ---map-dump:: - Dump BPF maps setup by events passed via -e, for instance the augmented_raw_syscalls - living in tools/perf/examples/bpf/augmented_raw_syscalls.c. For now this - dumps just boolean map values and integer keys, in time this will print in hex - by default and use BTF when available, as well as use functions to do pretty - printing using the existing 'perf trace' syscall arg beautifiers to map integer - arguments to strings (pid to comm, syscall id to syscall name, etc). +--force-btf:: + Use btf_dump to pretty print syscall argument data, instead of using hand-crafted pretty + printers. This option is intended for testing BTF integration in perf trace. btf_dump-based + pretty-printing serves as a fallback to hand-crafted pretty printers, as the latter can + better pretty-print integer flags and struct pointers. + +--bpf-summary:: + Collect system call statistics in BPF. This is only for live mode and + works well with -s/--summary option where no argument information is + required. PAGEFAULTS |