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- This command reads the input file and displays an annotated version of the code. If the object file has debug symbols then the source code will be <blockquote>Show the number of samples for each symbol8 KB (1,206 words) - 10:18, 8 April 2024
- ...with-hits, and collects the files with the buildids found so that analysis of perf.data contents can be possible on another machine. ...buildid-list.1|<tt>'''perf-buildid-list'''(1)</tt>]], [[Latest Manual Page of perf-report.1|<tt>'''perf-report'''(1)</tt>]]653 B (86 words) - 10:28, 8 April 2024
- ...PE (Statistical Profiling Extension) feature provides accurate attribution of latencies and events down to individual instructions. Rather than being int ...from a sample population, for SPE this is an IMPLEMENTATION DEFINED choice of all architectural instructions or all micro-ops. Sampling happens at a prog9 KB (1,329 words) - 10:28, 8 April 2024
- <blockquote>Specify number of times to repeat the run (default 10). <blockquote>Benchmark overhead of uprobe + BPF.7 KB (832 words) - 11:12, 8 April 2024
- ...ich will be used by perf-probe. For more details, see [[Latest Manual Page of perf-probe.1|<tt>'''perf-probe'''(1)</tt>]]. ...the same modules at the same addresses. Use the -v option to see if a copy of kcore is actually made.3 KB (514 words) - 11:15, 8 April 2024
- It can also be used to show the build id of the running kernel or in an ELF file using -i/--input. <blockquote>Show buildid, start/end text address, and path of running kernel and its modules.1 KB (178 words) - 11:15, 8 April 2024
- ...perf-arm-spe'''(1)</tt>]] for a setup guide. Due to the statistical nature of Arm SPE sampling, not every memory operation will be sampled. ...access - type of the access (load and store details) - latency (in cycles) of the load access10 KB (1,668 words) - 11:15, 8 April 2024
- ...nfiguration file contains many variables to change various aspects of each of its tools, including output, disk usage, etc. The ''$HOME/.perfconfig'' fil The file consist of sections. A section starts with its name surrounded by square brackets and25 KB (3,671 words) - 11:16, 8 April 2024
- You can imagine ''perf daemon'' of background process with several ''perf record'' child tasks, like: ...nning on top of base directory. Only one instance of server can run on top of one directory at the time.6 KB (770 words) - 11:16, 8 April 2024
- <blockquote>Triggers the CTF conversion, specify the path of CTF data directory. [[Latest Manual Page of perf.1|<tt>'''perf'''(1)</tt>]] [1] Common Trace Format - '''http://www.eff1 KB (177 words) - 11:16, 8 April 2024
- ... the symbols addresses could vary. So perf diff is based on the comparison of the files and symbols name. ...ands '''file://filename''' entries. This option will affect the percentage of the Baseline/Delta column. See --percentage for more info.10 KB (1,494 words) - 11:16, 8 April 2024
- The API for filtering consists of the following: If implemented, ''filter_description'' should return a one-line description of the filter, and optionally a longer description.11 KB (1,628 words) - 11:16, 8 April 2024
- This command displays the names of events sampled in a perf.data file. ...al Page of perf-list.1|<tt>'''perf-list'''(1)</tt>]], [[Latest Manual Page of perf-report.1|<tt>'''perf-report'''(1)</tt>]]980 B (132 words) - 11:16, 8 April 2024
- The ''perf ftrace'' command provides a collection of subcommands which use kernel’s ftrace infrastructure. <blockquote><pre>perf ftrace trace is a simple wrapper of the ftrace. It only supports5 KB (716 words) - 11:16, 8 April 2024
- ...ions and no COMMAND given, the synopsis of the ''perf'' command and a list of the most commonly used perf commands are printed on the standard output. If a perf command is named, a manual page for that command is brought up. The ''man'' program is used by default for1 KB (161 words) - 11:16, 8 April 2024
- ...ng to augment the events stream with additional information could make use of this facility. <blockquote>Inject build-ids of DSOs hit by samples into the output stream. This means it needs to process8 KB (1,170 words) - 11:16, 8 April 2024
- Intel Processor Trace (Intel PT) is an extension of Intel Architecture that collects information about software execution such ... tells whether a conditional branch was taken or not taken, so to make use of that packet the decoder must know precisely which instruction was being exe94 KB (13,746 words) - 11:16, 8 April 2024
- <blockquote><pre>$ perf iostat -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct Collect metrics for comma-separated list of PCIe root ports:3 KB (359 words) - 11:17, 8 April 2024
- This page is auto-generated. The kernel version is v6.9-rc3620 B (87 words) - 11:17, 8 April 2024
- There are two variants of perf kmem: record the kmem events of an arbitrary workload. Additional perf2 KB (370 words) - 11:17, 8 April 2024
Page text matches
- ...ysis is normally done. Instead of taking a test case and creating a trace of it, you need first to create a test case that is suitable for tracing. ==== Reducing and handling the massive amount of trace data ====379 KB (35,708 words) - 09:18, 18 January 2024
- <blockquote>Show the number of samples for each symbol ...ands '''file://filename''' entries. This option will affect the percentage of the overhead column. See --percentage for more info.32 KB (4,795 words) - 11:17, 8 April 2024
- ...exadecimal value that represents the raw register encoding with the layout of the event control registers as described by entries in /sys/bus/event_sourc ... the [[Latest Manual Page of perf-list.1|<tt>'''perf-list'''(1)</tt>]] man page for details on event modifiers.42 KB (6,542 words) - 11:17, 8 April 2024
- <blockquote>Print the compiled-in status of libraries. <blockquote><pre>List of debug variables allowed to set:4 KB (525 words) - 10:18, 8 April 2024
- ...nterpreter. It reads and processes the input file and displays the results of the trace analysis implemented in the given Python script, if any. ...eading the rest of this document if an example is enough for you; the rest of the document provides more details on each step and lists the library funct26 KB (3,982 words) - 11:17, 8 April 2024
- ...exadecimal value that represents the raw register encoding with the layout of the event control registers as described by entries in /sys/bus/event_sourc ... the [[Latest Manual Page of perf-list.1|<tt>'''perf-list'''(1)</tt>]] man page for details on event modifiers.32 KB (4,796 words) - 11:18, 8 April 2024
- There are several variants of perf script: <blockquote><pre>perf script to see a detailed trace of the workload that was24 KB (3,744 words) - 11:17, 8 April 2024
- ...nfiguration file contains many variables to change various aspects of each of its tools, including output, disk usage, etc. The ''$HOME/.perfconfig'' fil The file consist of sections. A section starts with its name surrounded by square brackets and25 KB (3,671 words) - 11:16, 8 April 2024
- ... CPUs can be provided as a comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. Default is to monitor all CPUS. <blockquote>Number of seconds to delay between refreshes.18 KB (2,714 words) - 11:18, 8 April 2024
- ... module name in which perf-probe searches probe points or lines. If a path of module file is passed, perf-probe treat it as an offline module (this means ...ames. When this is used with --cache, perf shows all cached probes instead of the live probes.15 KB (2,380 words) - 11:17, 8 April 2024
- ...or Programming Reference (PPR)] relevant to the family, model and stepping of the processor being used). Manual Volume 2: System Programming, 13.3 Instruction-Based Sampling). Examples to14 KB (2,141 words) - 11:17, 8 April 2024
- ...nterpreter. It reads and processes the input file and displays the results of the trace analysis implemented in the given Perl script, if any. ...ce file. That will generate a starter script containing a handler for each of the event types in the trace file; it simply prints every available field f8 KB (1,227 words) - 11:17, 8 April 2024
- ...perf-arm-spe'''(1)</tt>]] for a setup guide. Due to the statistical nature of Arm SPE sampling, not every memory operation will be sampled. ...access - type of the access (load and store details) - latency (in cycles) of the load access10 KB (1,668 words) - 11:15, 8 April 2024
- There are a couple of variants of perf kvm: a performance counter profile of guest os in realtime7 KB (1,067 words) - 11:17, 8 April 2024
- ... perf trace; options to perf trace record are found in the perf record man page. ...*", "'''msg'''", etc. See ''perf list'' for a complete list of events. Prefixing with ! shows all syscalls but the ones specified. You may15 KB (2,079 words) - 11:18, 8 April 2024
- ...PE (Statistical Profiling Extension) feature provides accurate attribution of latencies and events down to individual instructions. Rather than being int ...from a sample population, for SPE this is an IMPLEMENTATION DEFINED choice of all architectural instructions or all micro-ops. Sampling happens at a prog9 KB (1,329 words) - 10:28, 8 April 2024
- You can imagine ''perf daemon'' of background process with several ''perf record'' child tasks, like: ...nning on top of base directory. Only one instance of server can run on top of one directory at the time.6 KB (770 words) - 11:16, 8 April 2024
- ...ng to augment the events stream with additional information could make use of this facility. <blockquote>Inject build-ids of DSOs hit by samples into the output stream. This means it needs to process8 KB (1,170 words) - 11:16, 8 April 2024
- ... the symbols addresses could vary. So perf diff is based on the comparison of the files and symbols name. ...ands '''file://filename''' entries. This option will affect the percentage of the Baseline/Delta column. See --percentage for more info.10 KB (1,494 words) - 11:16, 8 April 2024
- <blockquote>Specify number of times to repeat the run (default 10). <blockquote>Benchmark overhead of uprobe + BPF.7 KB (832 words) - 11:12, 8 April 2024
