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| author | Alexei Starovoitov <ast@fb.com> | 2016-04-19 06:11:50 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-21 20:48:20 +0300 |
| commit | 85b67bcb7e4a23ced05e7020bf5843b9857f6881 (patch) | |
| tree | 5cb64f3464f1beeed2f950cc3cc2f41b121de2bf /include/trace/perf.h | |
| parent | c60c9840423f32117a5422511c53c39df0b4d1dd (diff) | |
| download | linux-85b67bcb7e4a23ced05e7020bf5843b9857f6881.tar.xz | |
perf, bpf: minimize the size of perf_trace_() tracepoint handler
move trace_call_bpf() into helper function to minimize the size
of perf_trace_*() tracepoint handlers.
text data bss dec hex filename
10541679 5526646 2945024 19013349 1221ee5 vmlinux_before
10509422 5526646 2945024 18981092 121a0e4 vmlinux_after
It may seem that perf_fetch_caller_regs() can also be moved,
but that is incorrect, since ip/sp will be wrong.
bpf+tracepoint performance is not affected, since
perf_swevent_put_recursion_context() is now inlined.
export_symbol_gpl can also be dropped.
No measurable change in normal perf tracepoints.
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/trace/perf.h')
| -rw-r--r-- | include/trace/perf.h | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/include/trace/perf.h b/include/trace/perf.h index a182306eefd7..88de5c205e86 100644 --- a/include/trace/perf.h +++ b/include/trace/perf.h @@ -64,16 +64,9 @@ perf_trace_##call(void *__data, proto) \ \ { assign; } \ \ - if (prog) { \ - *(struct pt_regs **)entry = __regs; \ - if (!trace_call_bpf(prog, entry) || hlist_empty(head)) { \ - perf_swevent_put_recursion_context(rctx); \ - return; \ - } \ - } \ - perf_trace_buf_submit(entry, __entry_size, rctx, \ - event_call->event.type, __count, __regs, \ - head, __task); \ + perf_trace_run_bpf_submit(entry, __entry_size, rctx, \ + event_call, __count, __regs, \ + head, __task); \ } /* |