Changes in Build

473f6c8f437b049f8ec015d57cd59bb983b1d85c - Merge tag 'perf-tools-for-v7.3-2026-08-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Sat, 22 Aug 2026 17:47:50 +0200

Merge tag 'perf-tools-for-v7.3-2026-08-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-toolsPull perf tools updates from Namhyung Kim: "perf c2c: - Add 'function view' in perf c2c report TUI (switched by pressing 'TAB' in the cacheline view) to organize samples around functions rather than cachelines in 3-level hierarchy: Level 1: Read-side function (sorted by estimated Cycles %) Level 2: Contending writer functions (sorted by Store count) Level 3: Shared cacheline addresses Users can navigate the entries and fold/unfold using 'e' key. An example output would look like below: Shared Data Functions Table (19 entries, sorted on Cycles %) Cycles Store % count Function / Contending function / Cacheline ---------------------------------------------------------------------- + 35.67% 876 + [k] cpupri_set + 24.31% 424 + [k] pull_rt_task - 16.53% 555 - [k] dequeue_pushable_task 145 - [k] pull_rt_task 145 0xff2d0082809da080 139 - [k] enqueue_pushable_task 70 0xff2d00a2071f9640 69 0xff2d0082809da000 python module support: - Extend "perf" python module so that it can be fully functional. The goal is to run scripts directly, not by 'perf script' command. This would give better performance as well as more control to build standalone programs with UI. - Add LiveSession helper (perf_live.py) to enable live event collection directly from Python using perf.evlist and perf.parse_events. perf stat: - Add --hide-zero-events option to suppress zero-count events - Reject conflicting --field-separator and --json-output options - Fix duplicate event output with --for-each-cgroup perf sched latency: - Add -H/--histogram and --hist-mode (log|linear) options to show scheduler wait latency histograms - Add --time option to filter analysis by time span in 'perf sched latency' ARM CoreSight: - Synthesize callchains for instruction samples from CoreSight trace using thread stack ('--itrace=g...') - Support call indentation ('perf script -F +callindent') to display call depth hierarchy on branch samples - Decode ETE (Embedded Trace Extension) exception packets Build system: - Add 'make install-build-deps' target to install required packages - Parallelize JSON and metric pre-computation in jevents.py for faster builds Vendor event/metric updates: - Add Intel Nova Lake events and update tables for existing models - Update AMD Zen 5 and Zen 6 core events - Update Arm64 Tegra410 metrics and PowerPC hcalls Internal changes and fixes: - Harden trace-event and synthetic event parsing against corrupted data - Fix unwinding of multi-threaded processes in libdw unwinder - Fix memory leaks in various commands and python bindings - Speed up 'perf test' shell tests"* tag 'perf-tools-for-v7.3-2026-08-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (232 commits) perf vendor events arm64: Fix Tegra410 Olympus event 0x0197 perf vendor events arm64: fix swapped MetricGroup for Tegra410 L1 prefetcher metrics perf evlist: Warn when 'sleep' workload is used without system-wide (-a) option perf c2c: document function view in perf-c2c man page perf c2c: add function view browser UI and cacheline detail perf c2c: build and finalize the function view hierarchy perf c2c: add function view hierarchy entry creation perf c2c: add function view stats merge and memory management perf c2c: add HPP list parsing for function view columns perf c2c: add column rendering for function view perf c2c: add function view model skeleton perf c2c: extract shared data structures into util/c2c.h perf test sample-parsing: Validate PERF_FORMAT_GROUP values without LOST perf dso: Replace assert with runtime check in dso__read_symbol() perf dso: Guard against cache underflow on short reads in dso_cache__memcpy() perf dso: Use stored fd error instead of stale errno in file_read() and file_size() perf dso: Guard close() against invalid fd in dso__decompress_kmodule_path() perf dso: Guard against errno==0 when dso__get_filename() returns NULL perf build: install-build-deps: add RHEL family devel package mapping perf build: Remove leftover feature tests for removed cxx and clang support ... List of files: /linux/tools/perf/ui/browsers/Build

1975d27d11924d99319562889d8a15214bb84cc7 - perf c2c: add function view browser UI and cacheline detail

Mon, 17 Aug 2026 11:46:22 +0200

perf c2c: add function view browser UI and cacheline detailAdd the browser front end: create/run/delete the hist_browser and add thetitle. The d shortcut opens the existing per-cacheline detail view for theselected level-3 cacheline. Level-3 entries retain the source cachelineindex, so the shortcut can locate the original entry without relying on apotentially ambiguous virtual address.Report a warning when the common model rejects a cacheline coalescing fieldlist without `iaddr`. Without it, the detail histograms may already havemerged samples from different functions and cannot support reliablefunction attribution.Keep visible-row accounting local to the function view by wrapping thegeneric browser refresh callback and recounting the currently reachablehierarchy before each redraw. This keeps navigation correct when a level-1row is collapsed while level-3 descendants remain expanded, without addingC2C-specific hooks to the shared hist_browser. Also handle Ctrl-C like theother function-view exit keys.Keep callchains hidden while the function browser runs, restoring theuser's setting while opening the cacheline detail view.Wire the builder into perf_c2c__browse_function_view().Signed-off-by: Jiebin Sun Reviewed-by: Tianyou Li Reviewed-by: Wangyang Guo Reviewed-by: Ian Rogers Cc: Dapeng Mi Cc: James Clark Cc: Thomas Falcon Signed-off-by: Namhyung Kim List of files: /linux/tools/perf/ui/browsers/Build

c771600c6af14749609b49565ffb4cac2959710d - Merge drm/drm-next into drm-intel-gt-next

Wed, 05 Feb 2025 10:29:14 +0100

Merge drm/drm-next into drm-intel-gt-nextWe need4ba4f1afb6a9 ("perf: Generic hotplug support for a PMU with a scope")in order to land a i915 PMU simplification and a fix. That landed in 6.12and we are stuck at 6.9 so lets bump things forward.Signed-off-by: Tvrtko Ursulin List of files: /linux/tools/perf/ui/browsers/Build

36ec807b627b4c0a0a382f0ae48eac7187d14b2b - Merge branch 'next' into for-linus

Fri, 20 Sep 2024 10:24:24 +0200

Merge branch 'next' into for-linusPrepare input updates for 6.12 merge window. List of files: /linux/tools/perf/ui/browsers/Build

f057b57270c2a17d3f45c177e9434fa5745caa48 - Merge branch 'ib/6.11-rc6-matrix-keypad-spitz' into next

Fri, 06 Sep 2024 06:49:07 +0200

Merge branch 'ib/6.11-rc6-matrix-keypad-spitz' into nextBring in changes removing support for platform data from matrix-keypaddriver. List of files: /linux/tools/perf/ui/browsers/Build

3daee2e4b3568f0ed88b0598df96547fcf21cb9b - Merge tag 'v6.10' into next

Tue, 16 Jul 2024 00:50:05 +0200

Merge tag 'v6.10' into nextSync up with mainline to bring in device_for_each_child_node_scoped()and other newer APIs. List of files: /linux/tools/perf/ui/browsers/Build

66e72a01b60ae6950ddbb3585fdc1424d303e14b - Merge tag 'v6.11-rc1' into clk-meson-next

Mon, 29 Jul 2024 16:32:02 +0200

Merge tag 'v6.11-rc1' into clk-meson-nextLinux 6.11-rc1 List of files: /linux/tools/perf/ui/browsers/Build

ee057c8c194b9283f4137b253b70e292693a39f0 - Merge tag 'v6.11-rc3' into trace/ring-buffer/core

Wed, 14 Aug 2024 22:56:42 +0200

Merge tag 'v6.11-rc3' into trace/ring-buffer/coreThe "reserve_mem" kernel command line parameter has been pulled intov6.11. Merge the latest -rc3 to allow the persistent ring buffer memory tobe able to be mapped at the address specified by the "reserve_mem" commandline parameter.Signed-off-by: Steven Rostedt (Google) List of files: /linux/tools/perf/ui/browsers/Build

c8faf11cd192214e231626c3ee973a35d8fc33f2 - Merge tag 'v6.11-rc1' into for-6.12

Tue, 30 Jul 2024 21:30:11 +0200

Merge tag 'v6.11-rc1' into for-6.12Linux 6.11-rc1 List of files: /linux/tools/perf/ui/browsers/Build

ed7171ff9fabc49ae6ed42fbd082a576473836fc - Merge drm/drm-next into drm-xe-next

Fri, 16 Aug 2024 19:05:54 +0200

Merge drm/drm-next into drm-xe-nextGet drm-xe-next on v6.11-rc2 and synchronized with drm-intel-next forthe display side. This resolves the current conflict for theenable_display module parameter and allows further pending refactors.Signed-off-by: Lucas De Marchi List of files: /linux/tools/perf/ui/browsers/Build

5c61f59824b5e46516ea5d0543ad7a8871567416 - Merge drm/drm-next into drm-misc-next

Mon, 12 Aug 2024 14:14:18 +0200

Merge drm/drm-next into drm-misc-nextGet drm-misc-next to the state of v6.11-rc2.Signed-off-by: Thomas Zimmermann List of files: /linux/tools/perf/ui/browsers/Build

3663e2c4bc45fcdc71931fcbfcbfbf9b71f55c83 - Merge drm/drm-next into drm-intel-next

Thu, 01 Aug 2024 12:06:09 +0200

Merge drm/drm-next into drm-intel-nextSync with v6.11-rc1 in general, and specifically get the newBACKLIGHT_POWER_ constants for power states.Signed-off-by: Jani Nikula List of files: /linux/tools/perf/ui/browsers/Build

4436e6da008fee87d54c038e983e5be9a6baf8fb - Merge branch 'linus' into x86/mm

Fri, 02 Aug 2024 14:10:55 +0200

Merge branch 'linus' into x86/mmBring x86 and selftests up to date List of files: /linux/tools/perf/ui/browsers/Build

a1ff5a7d78a036d6c2178ee5acd6ba4946243800 - Merge drm/drm-fixes into drm-misc-fixes

Tue, 30 Jul 2024 09:09:23 +0200

Merge drm/drm-fixes into drm-misc-fixesLet's start the new drm-misc-fixes cycle by bringing in 6.11-rc1.Signed-off-by: Maxime Ripard List of files: /linux/tools/perf/ui/browsers/Build

a23e1966932464e1c5226cb9ac4ce1d5fc10ba22 - Merge branch 'next' into for-linus

Mon, 15 Jul 2024 23:03:44 +0200

Merge branch 'next' into for-linusPrepare input updates for 6.11 merge window. List of files: /linux/tools/perf/ui/browsers/Build

6f47c7ae8c7afaf9ad291d39f0d3974f191a7946 - Merge tag 'v6.9' into next

Tue, 28 May 2024 06:37:18 +0200

Merge tag 'v6.9' into nextSync up with the mainline to bring in the new cleanup API. List of files: /linux/tools/perf/ui/browsers/Build

68b59730459e5d1fe4e0bbeb04ceb9df0f002270 - Merge tag 'perf-tools-for-v6.11-2024-07-16' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Thu, 18 Jul 2024 23:16:35 +0200

Merge tag 'perf-tools-for-v6.11-2024-07-16' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-toolsPull perf tools updates from Namhyung Kim: "Build: - Build each directory as a library so that depedency check for the python extension module can be automatic - Use pkg-config to check libtraceevent and libtracefs perf sched: - Add --task-name and --fuzzy-name options for `perf sched map` It focuses on selected tasks only by removing unrelated tasks in the output. It matches the task comm with the given string and the --fuzzy-name option allows the partial matching: $ sudo perf sched record -a sleep 1 $ sudo perf sched map --task-name kworker --fuzzy-name . . . . - *A0 . . 481065.315131 secs A0 => kworker/5:2-i91:438521 . . . . - *- . . 481065.315160 secs *B0 . . . - . . . 481065.316435 secs B0 => kworker/0:0-i91:437860 *- . . . . . . . 481065.316441 secs . . . . . *A0 . . 481065.318703 secs . . . . . *- . . 481065.318717 secs . . *C0 . . . . . 481065.320544 secs C0 => kworker/u16:30-:430186 . . *- . . . . . 481065.320555 secs . . *D0 . . . . . 481065.328524 secs D0 => kworker/2:0-kdm:429654 *B0 . D0 . - . . . 481065.328527 secs *- . D0 . - . . . 481065.328535 secs . . *- . . . . . 481065.328535 secs - Fix -r/--repeat option of perf sched replay The documentation said -1 will work as infinity but it didn't accept the value. Update the code and document to use 0 instead - Fix perf sched timehist to account the delay time for preempted tasks Perf event filtering: - perf top gained filtering support on regular events using BPF like perf record. Previously it was able to use it for tracepoints only - The BPF filter now supports filtering by UID/GID. This should be preferred than -u option as it's racy to scan /proc to check tasks for the user and fails to open an event for the task if it's already gone $ sudo perf top -e cycles --filter "uid == $(id -u)" perf report: - Skip dummy events in the group output by default. The --skip-empty option controls display of empty events without samples. But perf report can force display all events in a group In this case, auto-added a dummy event (for a system-wide record) ends up in the output. Now it can skip those empty events even in the group display mode To preserve the old behavior, run this: $ perf report --group --no-skip-empty perf stat: - Choose the most disaggregate option when multiple aggregation options are given. It used to pick the last option in the command line but it can be confusing and not consistent. Now it'll choose the smallest unit For example, it'd aggregate the result per-core when the user gave both --per-socket and --per-core options at the same time Internals: - Fix `perf bench` when some CPUs are offline - Fix handling of JIT symbol mappings to accept "/tmp/perf-${PID}.map patterns only so that it can not be confused by other /tmp/perf-* files - Many improvements and fixes for `perf test` Others: - Support some new instructions for Intel-PT - Fix syscall ID mapping in perf trace - Document AMD IBS PMU usages - Change `perf lock info` to show map and thread info by default Vendor JSON events: - Update Intel events and metrics - Add i.MX9[35] DDR metrics"* tag 'perf-tools-for-v6.11-2024-07-16' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (125 commits) perf trace: Fix iteration of syscall ids in syscalltbl->entries perf dso: Fix address sanitizer build perf mem: Warn if memory events are not supported on all CPUs perf arm-spe: Support multiple Arm SPE PMUs perf build x86: Fix SC2034 error in syscalltbl.sh perf record: Fix memset out-of-range error perf sched map: Add --fuzzy-name option for fuzzy matching in task names perf sched map: Add support for multiple task names using CSV perf sched map: Add task-name option to filter the output map perf build: Conditionally add feature check flags for libtrace{event,fs} perf install: Don't propagate subdir to Documentation submake perf vendor events arm64:: Add i.MX95 DDR Performance Monitor metrics perf vendor events arm64:: Add i.MX93 DDR Performance Monitor metrics perf dsos: When adding a dso into sorted dsos maintain the sort order perf comm str: Avoid sort during insert perf report: Calling available function for stats printing perf intel-pt: Fix exclude_guest setting perf intel-pt: Fix aux_watermark calculation for 64-bit size perf sched replay: Fix -r/--repeat command line option for infinity perf: pmus: Remove unneeded semicolon ... List of files: /linux/tools/perf/ui/browsers/Build

afeea2758b4f1210361ce2a91d8fa3e7df606ad2 - Merge drm-misc-next-2024-07-04 into drm-misc-next-fixes

Thu, 04 Jul 2024 15:19:33 +0200

Merge drm-misc-next-2024-07-04 into drm-misc-next-fixesLet's start the drm-misc-next-fixes cycle.Signed-off-by: Maxime Ripard List of files: /linux/tools/perf/ui/browsers/Build

39f3ce5cabdcb0b3216e2ab0d05402b4e4cd4155 - perf ui: Make ui its own library

Tue, 25 Jun 2024 23:41:11 +0200

perf ui: Make ui its own libraryMake the ui code its own library. This is done to avoid compiling codetwice, once for the perf tool and once for the perf python module.Signed-off-by: Ian Rogers Reviewed-by: James Clark Cc: Suzuki K Poulose Cc: Kees Cook Cc: Palmer Dabbelt Cc: Albert Ou Cc: Nick Terrell Cc: Gary Guo Cc: Alex Gaynor Cc: Boqun Feng Cc: Wedson Almeida Filho Cc: Ze Gao Cc: Alice Ryhl Cc: Andrei Vagin Cc: Yicong Yang Cc: Jonathan Cameron Cc: Guo Ren Cc: Miguel Ojeda Cc: Will Deacon Cc: Mike Leach Cc: Leo Yan Cc: Oliver Upton Cc: John Garry Cc: Benno Lossin Cc: Björn Roy Baron Cc: Andreas Hindborg Cc: Paul Walmsley Signed-off-by: Namhyung Kim Link: https://lore.kernel.org/r/20240625214117.953777-3-irogers@google.com List of files: /linux/tools/perf/ui/browsers/Build

d754ed2821fd9675d203cb73c4afcd593e28b7d0 - Merge drm/drm-next into drm-intel-next

Wed, 19 Jun 2024 10:38:31 +0200

Merge drm/drm-next into drm-intel-nextSync to v6.10-rc3.Signed-off-by: Jani Nikula List of files: /linux/tools/perf/ui/browsers/Build