Re: [PATCH net-next] perf, bpf: minimize the size of perf_trace_() tracepoint handler
From: David Miller
Date: Thu Apr 21 2016 - 13:50:05 EST
From: Alexei Starovoitov <ast@xxxxxx>
Date: Mon, 18 Apr 2016 20:11:50 -0700
> 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@xxxxxxxxxxx>
> Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Applied, thanks Alexei.