On Sun, Sep 15, 2024 at 11:09 AM Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> wrote: > > Hi, > > Here is the 15th version of the series to re-implement the fprobe on > function-graph tracer. The previous version is; > > https://lore.kernel.org/all/172615368656.133222.2336770908714920670.stgit@devnote2/ > > This version rebased on Steve's calltime change[1] instead of the last > patch in the previous series, and adds a bpf patch to add get_entry_ip() > for arm64. Note that [1] is not included in this series, so please use > the git branch[2]. > With LPC and Kernel Recipes back-to-back I won't have time to look through the code, but I did manage to run some benchmarks tonight, and they look pretty good now, thanks! Seems like the kprobe regression is gone, and kretprobes are a bit faster. So, nice work, thanks! BEFORE ====== kprobe : 25.052 ± 0.032M/s kprobe-multi : 28.102 ± 0.167M/s kretprobe : 10.724 ± 0.008M/s kretprobe-multi: 11.337 ± 0.054M/s AFTER ===== kprobe : 25.206 ± 0.026M/s kprobe-multi : 30.167 ± 0.148M/s kretprobe : 10.714 ± 0.016M/s kretprobe-multi: 13.436 ± 0.328M/s > [1] https://lore.kernel.org/all/20240914214805.779822616@xxxxxxxxxxx/ > [2] https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git/log/?h=topic/fprobe-on-fgraph > [...]
