Lines Matching full:perf

33 // JitLogger supports two approaches of perf profiling.
35 // (1) perf-map:
36 //     The perf-map mechanism generates perf-PID.map file,
37 //     which provides simple "address, size, method_name" information to perf,
38 //     and allows perf to map samples in jit-code-cache to jitted method symbols.
41 //       $ perf record dalvikvm -Xcompiler-option --generate-debug-info -cp <classpath> Test
42 //       $ perf report
44 //       - Make sure that the perf-PID.map file is available for 'perf report' tool to access,
48 // (2) perf-inject:
49 //     The perf-inject mechansim generates jit-PID.dump file,
51 //     It allows perf or other profiling tools to do advanced analysis on jitted code,
55 //       $ perf record -k mono dalvikvm -Xcompiler-option --generate-debug-info -cp <classpath> Test
56 //       $ perf inject -j -i perf.data -o perf.data.jitted
57 //       $ perf report -i perf.data.jitted
58 //       $ perf annotate -i perf.data.jitted
61 //       - The 'perf record -k mono' option requires 4.1 (or higher) Linux kernel.
62 //       - The 'perf inject' (generating jit ELF files feature) requires perf 4.6 (or higher).
63 //       PERF RECORD
64 //       - The '-k mono' option tells 'perf record' to use CLOCK_MONOTONIC clock during sampling;
65 //         which is required by 'perf inject', to make sure that both perf.data and jit-PID.dump
67 //       PERF INJECT
68 //       - The 'perf inject' tool injects information from jit-PID.dump into perf.data file,
71 //         such location is recorded in perf.data file.
72 //         The 'perf inject' tool is going to look for jit-PID.dump and generates small ELF files in
76 //         'perf inject' tool operates on this folder.
78 //       - If you are executing 'perf inject' on non-Android devices (host), but perf.data and
81 //       - Currently 'perf inject' doesn't provide option to change the path for jit-PID.dump and
83 //       PERF ANNOTATE
84 //       - The 'perf annotate' tool displays assembly level profiling report.
86 //       - Make sure above small ELF files are available for 'perf annotate' tool to access,
110     // For perf-map profiling
116     // For perf-inject profiling