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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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cebf7d51a6
This patch prints the stddev and hist for the cycles diff of program block. It can help us to understand if the cycles is noisy or not. This patch is inspired by Andi Kleen's patch: https://lwn.net/Articles/600471/ We create new option '--cycles-hist'. Example: perf record -b ./div perf record -b ./div perf diff -c cycles # Baseline [Program Block Range] Cycles Diff Shared Object Symbol # ........ .......................................................... .... ................. ............................ # 46.72% [div.c:40 -> div.c:40] 0 div [.] main 46.72% [div.c:42 -> div.c:44] 0 div [.] main 46.72% [div.c:42 -> div.c:39] 0 div [.] main 20.54% [random_r.c:357 -> random_r.c:394] 1 libc-2.27.so [.] __random_r 20.54% [random_r.c:357 -> random_r.c:380] 0 libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:388] 0 libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:391] 0 libc-2.27.so [.] __random_r 17.04% [random.c:288 -> random.c:291] 0 libc-2.27.so [.] __random 17.04% [random.c:291 -> random.c:291] 0 libc-2.27.so [.] __random 17.04% [random.c:293 -> random.c:293] 0 libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 libc-2.27.so [.] __random 17.04% [random.c:298 -> random.c:298] 0 libc-2.27.so [.] __random 8.40% [div.c:22 -> div.c:25] 0 div [.] compute_flag 8.40% [div.c:27 -> div.c:28] 0 div [.] compute_flag 5.14% [rand.c:26 -> rand.c:27] 0 libc-2.27.so [.] rand 5.14% [rand.c:28 -> rand.c:28] 0 libc-2.27.so [.] rand 2.15% [rand@plt+0 -> rand@plt+0] 0 div [.] rand@plt 0.00% [kernel.kallsyms] [k] __x86_indirect_thunk_rax 0.00% [do_mmap+714 -> do_mmap+732] -10 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+737 -> do_mmap+765] 1 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+262 -> do_mmap+299] 0 [kernel.kallsyms] [k] do_mmap 0.00% [__x86_indirect_thunk_r15+0 -> __x86_indirect_thunk_r15+0] 7 [kernel.kallsyms] [k] __x86_indirect_thunk_r15 0.00% [native_sched_clock+0 -> native_sched_clock+119] -1 [kernel.kallsyms] [k] native_sched_clock 0.00% [native_write_msr+0 -> native_write_msr+16] -13 [kernel.kallsyms] [k] native_write_msr When we enable the option '--cycles-hist', the output is perf diff -c cycles --cycles-hist # Baseline [Program Block Range] Cycles Diff stddev/Hist Shared Object Symbol # ........ .......................................................... .... ................. ................. ............................ # 46.72% [div.c:40 -> div.c:40] 0 ± 37.8% ▁█▁▁██▁█ div [.] main 46.72% [div.c:42 -> div.c:44] 0 ± 49.4% ▁▁▂█▂▂▂▂ div [.] main 46.72% [div.c:42 -> div.c:39] 0 ± 24.1% ▃█▂▄▁▃▂▁ div [.] main 20.54% [random_r.c:357 -> random_r.c:394] 1 ± 33.5% ▅▂▁█▃▁▂▁ libc-2.27.so [.] __random_r 20.54% [random_r.c:357 -> random_r.c:380] 0 ± 39.4% ▁▁█▁██▅▁ libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:388] 0 libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:391] 0 ± 41.2% ▁▃▁▂█▄▃▁ libc-2.27.so [.] __random_r 17.04% [random.c:288 -> random.c:291] 0 ± 48.8% ▁▁▁▁███▁ libc-2.27.so [.] __random 17.04% [random.c:291 -> random.c:291] 0 ±100.0% ▁█▁▁▁▁▁▁ libc-2.27.so [.] __random 17.04% [random.c:293 -> random.c:293] 0 ±100.0% ▁█▁▁▁▁▁▁ libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 ±100.0% ▁█▁▁▁▁▁▁ libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 libc-2.27.so [.] __random 17.04% [random.c:298 -> random.c:298] 0 ± 75.6% ▃█▁▁▁▁▁▁ libc-2.27.so [.] __random 8.40% [div.c:22 -> div.c:25] 0 ± 42.1% ▁▃▁▁███▁ div [.] compute_flag 8.40% [div.c:27 -> div.c:28] 0 ± 41.8% ██▁▁▄▁▁▄ div [.] compute_flag 5.14% [rand.c:26 -> rand.c:27] 0 ± 37.8% ▁▁▁████▁ libc-2.27.so [.] rand 5.14% [rand.c:28 -> rand.c:28] 0 libc-2.27.so [.] rand 2.15% [rand@plt+0 -> rand@plt+0] 0 div [.] rand@plt 0.00% [kernel.kallsyms] [k] __x86_indirect_thunk_rax 0.00% [do_mmap+714 -> do_mmap+732] -10 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+737 -> do_mmap+765] 1 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+262 -> do_mmap+299] 0 [kernel.kallsyms] [k] do_mmap 0.00% [__x86_indirect_thunk_r15+0 -> __x86_indirect_thunk_r15+0] 7 [kernel.kallsyms] [k] __x86_indirect_thunk_r15 0.00% [native_sched_clock+0 -> native_sched_clock+119] -1 ± 38.5% ▄█▁ [kernel.kallsyms] [k] native_sched_clock 0.00% [native_write_msr+0 -> native_write_msr+16] -13 ± 47.1% ▁█▇▃▁▁ [kernel.kallsyms] [k] native_write_msr v8: --- Rebase to perf/core branch v7: --- 1. v6 got Jiri's ACK. 2. Rebase to latest perf/core branch. v6: --- 1. Jiri provides better code for using data__hpp_register() in ui_init(). Use this code in v6. v5: --- 1. Refine the use of data__hpp_register() in ui_init() according to Jiri's suggestion. v4: --- 1. Rename the new option from '--noisy' to '--cycles-hist' 2. Remove the option '-n'. 3. Only update the spark value and stats when '--cycles-hist' is enabled. 4. Remove the code of printing '..'. v3: --- 1. Move the histogram to a separate column 2. Move the svals[] out of struct stats v2: --- Jiri got a compile error, CC builtin-diff.o builtin-diff.c: In function ‘compute_cycles_diff’: builtin-diff.c:712:10: error: taking the absolute value of unsigned type ‘u64’ {aka ‘long unsigned int’} has no effect [-Werror=absolute-value] 712 | labs(pair->block_info->cycles_spark[i] - | ^~~~ Because the result of u64 - u64 is still u64. Now we change the type of cycles_spark[] to s64. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20190925011446.30678-1-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
253 lines
6.9 KiB
Plaintext
253 lines
6.9 KiB
Plaintext
perf-y += annotate.o
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perf-y += block-range.o
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perf-y += build-id.o
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perf-y += cacheline.o
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perf-y += config.o
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perf-y += copyfile.o
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perf-y += ctype.o
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perf-y += db-export.o
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perf-y += env.o
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perf-y += event.o
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perf-y += evlist.o
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perf-y += evsel.o
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perf-y += evsel_fprintf.o
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perf-y += perf_event_attr_fprintf.o
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perf-y += evswitch.o
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perf-y += find_bit.o
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perf-y += get_current_dir_name.o
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perf-y += kallsyms.o
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perf-y += levenshtein.o
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perf-y += llvm-utils.o
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perf-y += mmap.o
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perf-y += memswap.o
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perf-y += parse-events.o
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perf-y += perf_regs.o
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perf-y += path.o
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perf-y += print_binary.o
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perf-y += rlimit.o
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perf-y += argv_split.o
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perf-y += rbtree.o
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perf-y += libstring.o
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perf-y += bitmap.o
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perf-y += hweight.o
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perf-y += smt.o
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perf-y += strbuf.o
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perf-y += string.o
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perf-y += strlist.o
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perf-y += strfilter.o
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perf-y += top.o
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perf-y += usage.o
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perf-y += dso.o
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perf-y += dsos.o
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perf-y += symbol.o
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perf-y += symbol_fprintf.o
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perf-y += color.o
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perf-y += color_config.o
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perf-y += metricgroup.o
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perf-y += header.o
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perf-y += callchain.o
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perf-y += values.o
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perf-y += debug.o
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perf-y += machine.o
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perf-y += map.o
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perf-y += pstack.o
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perf-y += session.o
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perf-y += sample-raw.o
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perf-y += s390-sample-raw.o
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perf-$(CONFIG_TRACE) += syscalltbl.o
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perf-y += ordered-events.o
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perf-y += namespaces.o
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perf-y += comm.o
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perf-y += thread.o
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perf-y += thread_map.o
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perf-y += trace-event-parse.o
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perf-y += parse-events-flex.o
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perf-y += parse-events-bison.o
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perf-y += pmu.o
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perf-y += pmu-flex.o
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perf-y += pmu-bison.o
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perf-y += trace-event-read.o
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perf-y += trace-event-info.o
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perf-y += trace-event-scripting.o
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perf-y += trace-event.o
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perf-y += svghelper.o
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perf-y += sort.o
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perf-y += hist.o
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perf-y += util.o
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perf-y += cpumap.o
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perf-y += cputopo.o
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perf-y += cgroup.o
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perf-y += target.o
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perf-y += rblist.o
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perf-y += intlist.o
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perf-y += vdso.o
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perf-y += counts.o
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perf-y += stat.o
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perf-y += stat-shadow.o
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perf-y += stat-display.o
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perf-y += record.o
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perf-y += srcline.o
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perf-y += srccode.o
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perf-y += synthetic-events.o
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perf-y += data.o
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perf-y += tsc.o
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perf-y += cloexec.o
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perf-y += call-path.o
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perf-y += rwsem.o
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perf-y += thread-stack.o
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perf-y += spark.o
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perf-$(CONFIG_AUXTRACE) += auxtrace.o
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perf-$(CONFIG_AUXTRACE) += intel-pt-decoder/
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perf-$(CONFIG_AUXTRACE) += intel-pt.o
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perf-$(CONFIG_AUXTRACE) += intel-bts.o
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perf-$(CONFIG_AUXTRACE) += arm-spe.o
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perf-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o
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perf-$(CONFIG_AUXTRACE) += s390-cpumsf.o
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ifdef CONFIG_LIBOPENCSD
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perf-$(CONFIG_AUXTRACE) += cs-etm.o
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perf-$(CONFIG_AUXTRACE) += cs-etm-decoder/
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endif
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perf-y += parse-branch-options.o
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perf-y += dump-insn.o
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perf-y += parse-regs-options.o
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perf-y += term.o
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perf-y += help-unknown-cmd.o
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perf-y += mem-events.o
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perf-y += vsprintf.o
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perf-y += units.o
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perf-y += time-utils.o
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perf-y += expr-bison.o
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perf-y += branch.o
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perf-y += mem2node.o
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perf-$(CONFIG_LIBBPF) += bpf-loader.o
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perf-$(CONFIG_LIBBPF) += bpf_map.o
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perf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o
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perf-$(CONFIG_LIBELF) += symbol-elf.o
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perf-$(CONFIG_LIBELF) += probe-file.o
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perf-$(CONFIG_LIBELF) += probe-event.o
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ifndef CONFIG_LIBELF
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perf-y += symbol-minimal.o
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endif
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ifndef CONFIG_SETNS
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perf-y += setns.o
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endif
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perf-$(CONFIG_DWARF) += probe-finder.o
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perf-$(CONFIG_DWARF) += dwarf-aux.o
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perf-$(CONFIG_DWARF) += dwarf-regs.o
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perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
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perf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind-local.o
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perf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
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perf-$(CONFIG_LIBUNWIND_X86) += libunwind/x86_32.o
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perf-$(CONFIG_LIBUNWIND_AARCH64) += libunwind/arm64.o
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perf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o
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perf-y += scripting-engines/
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perf-$(CONFIG_ZLIB) += zlib.o
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perf-$(CONFIG_LZMA) += lzma.o
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perf-$(CONFIG_ZSTD) += zstd.o
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perf-$(CONFIG_LIBCAP) += cap.o
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perf-y += demangle-java.o
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perf-y += demangle-rust.o
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ifdef CONFIG_JITDUMP
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perf-$(CONFIG_LIBELF) += jitdump.o
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perf-$(CONFIG_LIBELF) += genelf.o
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perf-$(CONFIG_DWARF) += genelf_debug.o
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endif
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perf-y += perf-hooks.o
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perf-$(CONFIG_LIBBPF) += bpf-event.o
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perf-$(CONFIG_CXX) += c++/
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CFLAGS_config.o += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_llvm-utils.o += -DPERF_INCLUDE_DIR="BUILD_STR($(perf_include_dir_SQ))"
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# avoid compiler warnings in 32-bit mode
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CFLAGS_genelf_debug.o += -Wno-packed
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$(OUTPUT)util/parse-events-flex.c: util/parse-events.l $(OUTPUT)util/parse-events-bison.c
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,flex)$(FLEX) -o $@ --header-file=$(OUTPUT)util/parse-events-flex.h $(PARSER_DEBUG_FLEX) util/parse-events.l
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$(OUTPUT)util/parse-events-bison.c: util/parse-events.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v util/parse-events.y -d $(PARSER_DEBUG_BISON) -o $@ -p parse_events_
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$(OUTPUT)util/expr-bison.c: util/expr.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v util/expr.y -d $(PARSER_DEBUG_BISON) -o $@ -p expr__
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$(OUTPUT)util/pmu-flex.c: util/pmu.l $(OUTPUT)util/pmu-bison.c
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,flex)$(FLEX) -o $@ --header-file=$(OUTPUT)util/pmu-flex.h util/pmu.l
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$(OUTPUT)util/pmu-bison.c: util/pmu.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v util/pmu.y -d -o $@ -p perf_pmu_
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CFLAGS_parse-events-flex.o += -w
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CFLAGS_pmu-flex.o += -w
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CFLAGS_parse-events-bison.o += -DYYENABLE_NLS=0 -w
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CFLAGS_pmu-bison.o += -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -w
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CFLAGS_expr-bison.o += -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -w
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$(OUTPUT)util/parse-events.o: $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-bison.c
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$(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c
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CFLAGS_bitmap.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_find_bit.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_rbtree.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_libstring.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_hweight.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_parse-events.o += -Wno-redundant-decls
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CFLAGS_header.o += -include $(OUTPUT)PERF-VERSION-FILE
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$(OUTPUT)util/kallsyms.o: ../lib/symbol/kallsyms.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/argv_split.o: ../lib/argv_split.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/bitmap.o: ../lib/bitmap.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/ctype.o: ../lib/ctype.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/find_bit.o: ../lib/find_bit.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/rbtree.o: ../lib/rbtree.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/libstring.o: ../lib/string.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/hweight.o: ../lib/hweight.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/vsprintf.o: ../lib/vsprintf.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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