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| author | Alexei Starovoitov <ast@fb.com> | 2016-04-18 20:11:50 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-21 13:48:20 -0400 |
| commit | 85b67bcb7e4a23ced05e7020bf5843b9857f6881 (patch) | |
| tree | 5cb64f3464f1beeed2f950cc3cc2f41b121de2bf /include/linux/trace_events.h | |
| parent | c60c9840423f32117a5422511c53c39df0b4d1dd (diff) | |
| download | lwn-85b67bcb7e4a23ced05e7020bf5843b9857f6881.tar.gz lwn-85b67bcb7e4a23ced05e7020bf5843b9857f6881.zip | |
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/linux/trace_events.h')
| -rw-r--r-- | include/linux/trace_events.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index fe6441203b59..222f6aa0418f 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -609,6 +609,11 @@ extern void ftrace_profile_free_filter(struct perf_event *event); void perf_trace_buf_update(void *record, u16 type); void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); +void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx, + struct trace_event_call *call, u64 count, + struct pt_regs *regs, struct hlist_head *head, + struct task_struct *task); + static inline void perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type, u64 count, struct pt_regs *regs, void *head, |