diff options
Diffstat (limited to 'tools/perf/Documentation/perf-config.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-config.txt | 108 |
1 files changed, 71 insertions, 37 deletions
diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt index c7d3df5798e2..379f9d7a8ab1 100644 --- a/tools/perf/Documentation/perf-config.txt +++ b/tools/perf/Documentation/perf-config.txt @@ -123,10 +123,8 @@ Given a $HOME/.perfconfig like this: queue-size = 0 children = true group = true + skip-empty = true - [llvm] - dump-obj = true - clang-opt = -g You can hide source code of annotate feature setting the config to false with @@ -138,7 +136,7 @@ If you want to add or modify several config items, you can do like To modify the sort order of report functionality in user config file(i.e. `~/.perfconfig`), do - % perf config --user report sort-order=srcline + % perf config --user report.sort-order=srcline To change colors of selected line to other foreground and background colors in system config file (i.e. `$(sysconf)/perfconfig`), do @@ -238,10 +236,29 @@ buildid.*:: cache location, or to disable it altogether. If you want to disable it, set buildid.dir to /dev/null. The default is $HOME/.debug +buildid-cache.*:: + buildid-cache.debuginfod=URLs + Specify debuginfod URLs to be used when retrieving perf.data binaries, + it follows the same syntax as the DEBUGINFOD_URLS variable, like: + + buildid-cache.debuginfod=http://192.168.122.174:8002 + annotate.*:: These are in control of addresses, jump function, source code in lines of assembly code from a specific program. + annotate.addr2line:: + addr2line binary to use for file names and line numbers. + + annotate.objdump:: + objdump binary to use for disassembly and annotations, + including in the 'perf test' command. + + annotate.disassembler_style:: + Use this to change the default disassembler style to some other value + supported by binutils, such as "intel", see the '-M' option help in the + 'objdump' man page. + annotate.hide_src_code:: If a program which is analyzed has source code, this option lets 'annotate' print a list of assembly code with the source code. @@ -381,6 +398,12 @@ annotate.*:: This option works with tui, stdio2 browsers. + annotate.demangle:: + Demangle symbol names to human readable form. Default is 'true'. + + annotate.demangle_kernel:: + Demangle kernel symbol names to human readable form. Default is 'true'. + hist.*:: hist.percentage:: This option control the way to calculate overhead of filtered entries - @@ -513,6 +536,10 @@ report.*:: 0.07% 0.00% noploop ld-2.15.so [.] strcmp 0.03% 0.00% noploop [kernel.kallsyms] [k] timerqueue_del + report.skip-empty:: + This option can change default stat behavior with empty results. + If it's set true, 'perf report --stat' will not show 0 stats. + top.*:: top.children:: Same as 'report.children'. So if it is enabled, the output of 'top' @@ -547,11 +574,12 @@ kmem.*:: record.*:: record.build-id:: - This option can be 'cache', 'no-cache' or 'skip'. + This option can be 'cache', 'no-cache', 'skip' or 'mmap'. 'cache' is to post-process data and save/update the binaries into the build-id cache (in ~/.debug). This is the default. But if this option is 'no-cache', it will not update the build-id cache. 'skip' skips post-processing and does not update the cache. + 'mmap' skips post-processing and reads build-ids from MMAP events. record.call-graph:: This is identical to 'call-graph.record-mode', except it is @@ -563,6 +591,15 @@ record.*:: Use 'n' control blocks in asynchronous (Posix AIO) trace writing mode ('n' default: 1, max: 4). + record.debuginfod:: + Specify debuginfod URL to be used when cacheing perf.data binaries, + it follows the same syntax as the DEBUGINFOD_URLS variable, like: + + http://192.168.122.174:8002 + + If the URLs is 'system', the value of DEBUGINFOD_URLS system environment + variable is used. + diff.*:: diff.order:: This option sets the number of columns to sort the result. @@ -614,38 +651,9 @@ trace.*:: ftrace.*:: ftrace.tracer:: - Can be used to select the default tracer. Possible values are - 'function' and 'function_graph'. - -llvm.*:: - llvm.clang-path:: - Path to clang. If omit, search it from $PATH. - - llvm.clang-bpf-cmd-template:: - Cmdline template. Below lines show its default value. Environment - variable is used to pass options. - "$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\ - "-DLINUX_VERSION_CODE=$LINUX_VERSION_CODE " \ - "$CLANG_OPTIONS $PERF_BPF_INC_OPTIONS $KERNEL_INC_OPTIONS " \ - "-Wno-unused-value -Wno-pointer-sign " \ - "-working-directory $WORKING_DIR " \ - "-c \"$CLANG_SOURCE\" -target bpf $CLANG_EMIT_LLVM -O2 -o - $LLVM_OPTIONS_PIPE" - - llvm.clang-opt:: - Options passed to clang. - - llvm.kbuild-dir:: - kbuild directory. If not set, use /lib/modules/`uname -r`/build. - If set to "" deliberately, skip kernel header auto-detector. - - llvm.kbuild-opts:: - Options passed to 'make' when detecting kernel header options. - - llvm.dump-obj:: - Enable perf dump BPF object files compiled by LLVM. - - llvm.opts:: - Options passed to llc. + Can be used to select the default tracer when neither -G nor + -F option is not specified. Possible values are 'function' and + 'function_graph'. samples.*:: @@ -681,6 +689,12 @@ intel-pt.*:: If set, Intel PT decoder will set the mispred flag on all branches. + intel-pt.max-loops:: + If set and non-zero, the maximum number of unconditional + branches decoded without consuming any trace packets. If + the maximum is exceeded there will be a "Never-ending loop" + error. The default is 100000. + auxtrace.*:: auxtrace.dumpdir:: @@ -689,6 +703,26 @@ auxtrace.*:: If the directory does not exist or has the wrong file type, the current directory is used. +itrace.*:: + + debug-log-buffer-size:: + Log size in bytes to output when using the option --itrace=d+e + Refer 'itrace' option of linkperf:perf-script[1] or + linkperf:perf-report[1]. The default is 16384. + +daemon.*:: + + daemon.base:: + Base path for daemon data. All sessions data are stored under + this path. + +session-<NAME>.*:: + + session-<NAME>.run:: + + Defines new record session for daemon. The value is record's + command line without the 'record' keyword. + SEE ALSO -------- linkperf:perf[1] |