Thread (15 messages) 15 messages, 6 authors, 2023-06-14

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

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
  
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