kernel/tools/perf/bench/uprobe.c, branch linux-rolling-stable

perf bench uprobe: Add uretprobe variant of uprobe benchmarks

2024-04-12T20:54:02Z

Name benchmarks with _ret at the end to avoid creating a new set of benchmarks. Signed-off-by: Ian Rogers Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andrei Vagin Cc: Ingo Molnar Cc: Kan Liang Cc: Kees Kook Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20240406040911.1603801-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf bench uprobe: Remove lib64 from libc.so.6 binary path

2024-04-12T20:54:02Z

bpf_program__attach_uprobe_opts will search LD_LIBRARY_PATH and so specifying `/lib64` is unnecessary and causes failures for libc.so.6 paths like `/lib/x86_64-linux-gnu/libc.so.6`. Fixes: 7b47623b8cae8149 ("perf bench uprobe trace_printk: Add entry attaching an BPF program that does a trace_printk") Signed-off-by: Ian Rogers Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andrei Vagin Cc: Ingo Molnar Cc: Kan Liang Cc: Kees Kook Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20240406040911.1603801-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf bench uprobe: Fix potential use of memory after free

2023-10-12T17:01:55Z

Found by clang-tidy: ``` bench/uprobe.c:98:3: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc] bench_uprobe_bpf__destroy(skel); ``` Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Ravi Bangoria Cc: Nick Desaulniers Cc: Yang Jihong Cc: Huacai Chen Cc: Nathan Chancellor Cc: Kan Liang Cc: llvm@lists.linux.dev Cc: Ming Wang Cc: Tom Rix Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20231009183920.200859-6-irogers@google.com Signed-off-by: Namhyung Kim

perf bench uprobe trace_printk: Add entry attaching an BPF program that does a trace_printk

2023-07-20T14:33:24Z

[root@five ~]# perf bench uprobe all # Running uprobe/baseline benchmark... # Executed 1,000 usleep(1000) calls Total time: 1,053,963 usecs 1,053.963 usecs/op # Running uprobe/empty benchmark... # Executed 1,000 usleep(1000) calls Total time: 1,056,293 usecs +2,330 to baseline 1,056.293 usecs/op 2.330 usecs/op to baseline # Running uprobe/trace_printk benchmark... # Executed 1,000 usleep(1000) calls Total time: 1,056,977 usecs +3,014 to baseline +684 to previous 1,056.977 usecs/op 3.014 usecs/op to baseline 0.684 usecs/op to previous [root@five ~]# Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Andre Fredette Cc: Clark Williams Cc: Dave Tucker Cc: Derek Barbosa Cc: Jiri Olsa Cc: Masami Hiramatsu (Google) Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20230719204910.539044-6-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf bench uprobe empty: Add entry attaching an empty BPF program

2023-07-20T14:33:02Z

Using libbpf and a BPF skel: # perf bench uprobe all # Running uprobe/baseline benchmark... # Executed 1,000 usleep(1000) calls Total time: 1,055,618 usecs 1,055.618 usecs/op # Running uprobe/empty benchmark... # Executed 1,000 usleep(1000) calls Total time: 1,057,146 usecs +1,528 to baseline 1,057.146 usecs/op # Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Andre Fredette Cc: Clark Williams Cc: Dave Tucker Cc: Derek Barbosa Cc: Jiri Olsa Cc: Masami Hiramatsu (Google) Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20230719204910.539044-5-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf bench uprobe: Show diff to previous

2023-07-20T14:32:36Z

Will be useful to show the incremental overhead as we do more stuff in the BPF program attached to the uprobes. Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Andre Fredette Cc: Clark Williams Cc: Dave Tucker Cc: Derek Barbosa Cc: Jiri Olsa Cc: Masami Hiramatsu (Google) Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20230719204910.539044-4-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf bench uprobe: Print diff to baseline

2023-07-20T14:32:13Z

This is just prep work to show the diff to the unmodified workload. Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Andre Fredette Cc: Clark Williams Cc: Dave Tucker Cc: Derek Barbosa Cc: Jiri Olsa Cc: Masami Hiramatsu (Google) Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20230719204910.539044-3-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf bench uprobe: Add benchmark to test uprobe overhead

2023-07-20T14:31:19Z

This just adds the initial "workload", a call to libc's usleep(1000us) function: $ perf stat --null perf bench uprobe all # Running uprobe/baseline benchmark... # Executed 1000 usleep(1000) calls Total time: 1053533 usecs 1053.533 usecs/op Performance counter stats for 'perf bench uprobe all': 1.061042896 seconds time elapsed 0.001079000 seconds user 0.006499000 seconds sys $ More entries will be added using a BPF skel to add various uprobes to the usleep() function. Acked-by: Ian Rogers Cc: Adrian Hunter Cc: Andre Fredette Cc: Clark Williams Cc: Dave Tucker Cc: Derek Barbosa Cc: Jiri Olsa Cc: Masami Hiramatsu (Google) Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20230719204910.539044-2-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo