diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/Documentation/perf-config.txt | 88 |
1 files changed, 78 insertions, 10 deletions
diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt index 8ead55593984..39c890ead2dc 100644 --- a/tools/perf/Documentation/perf-config.txt +++ b/tools/perf/Documentation/perf-config.txt @@ -123,6 +123,7 @@ Given a $HOME/.perfconfig like this: queue-size = 0 children = true group = true + skip-empty = true [llvm] dump-obj = true @@ -138,7 +139,7 @@ If you want to add or modify several config items, you can do like To modify the sort order of report functionality in user config file(i.e. `~/.perfconfig`), do - % perf config --user report sort-order=srcline + % perf config --user report.sort-order=srcline To change colors of selected line to other foreground and background colors in system config file (i.e. `$(sysconf)/perfconfig`), do @@ -238,10 +239,22 @@ 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.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 +394,12 @@ 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 - @@ -405,14 +424,16 @@ ui.*:: This option is only applied to TUI. call-graph.*:: - When sub-commands 'top' and 'report' work with -g/—-children - there're options in control of call-graph. + The following controls the handling of call-graphs (obtained via the + -g/--call-graph options). call-graph.record-mode:: - The record-mode can be 'fp' (frame pointer), 'dwarf' and 'lbr'. - The value of 'dwarf' is effective only if perf detect needed library - (libunwind or a recent version of libdw). - 'lbr' only work for cpus that support it. + The mode for user space can be 'fp' (frame pointer), 'dwarf' + and 'lbr'. The value 'dwarf' is effective only if libunwind + (or a recent version of libdw) is present on the system; + the value 'lbr' only works for certain cpus. The method for + kernel space is controlled not by this option but by the + kernel config (CONFIG_UNWINDER_*). call-graph.dump-size:: The size of stack to dump in order to do post-unwinding. Default is 8192 (byte). @@ -511,6 +532,10 @@ 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' @@ -545,11 +570,12 @@ 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 @@ -561,6 +587,15 @@ 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. @@ -612,8 +647,9 @@ trace.*:: ftrace.*:: ftrace.tracer:: - Can be used to select the default tracer. Possible values are - 'function' and 'function_graph'. + Can be used to select the default tracer when neither -G nor + -F option is not specified. Possible values are 'function' and + 'function_graph'. llvm.*:: llvm.clang-path:: @@ -665,6 +701,11 @@ convert.*:: Limit the size of ordered_events queue, so we could control allocation size of perf data files without proper finished round events. +stat.*:: + + stat.big-num:: + (boolean) Change the default for "--big-num". To make + "--no-big-num" the default, set "stat.big-num=false". intel-pt.*:: @@ -674,6 +715,12 @@ 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:: @@ -682,6 +729,27 @@ 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] |