Re: [PATCHv2] ftrace: Show all functions with addresses in available_filter_functions_addrs
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2023-06-14 15:12:19
Also in:
bpf, lkml
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2023-06-14 15:12:19
Also in:
bpf, lkml
On Wed, 14 Jun 2023 16:14:19 +0200 Jiri Olsa [off-list ref] wrote:
FYI I did some perf meassurements and the speedup is not substantial :-\ looks like the symbols resolving to addresses we do in kernel for kprobe_multi link is more faster/cheaper than I thought
The symbol lookup is supposed to be fast, but it's not "free", whereas this is "free". I didn't expect a big speedup. -- Steve
but still there is 'some' speedup and we will get rid of the extra /proc/kallsyms parsing, so I think it's still worth it to have the new file