en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/tools/perf/ui/browsers/c2c-function.c#473f6c8f437b049f8ec015d57cd59bb983b1d85c 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/c2c-function.c Sat, 22 Aug 2026 17:47:50 +0200 Linus Torvalds <torvalds@linux-foundation.org> http://kernelsources.org:8080/source/history/linux/tools/perf/ui/browsers/c2c-function.c#1975d27d11924d99319562889d8a15214bb84cc7 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 <jiebin.sun@intel.com>Reviewed-by: Tianyou Li <tianyou.li@intel.com>Reviewed-by: Wangyang Guo <wangyang.guo@intel.com>Reviewed-by: Ian Rogers <irogers@google.com>Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>Cc: James Clark <james.clark@linaro.org>Cc: Thomas Falcon <thomas.falcon@intel.com>Signed-off-by: Namhyung Kim <namhyung@kernel.org> List of files: /linux/tools/perf/ui/browsers/c2c-function.c Mon, 17 Aug 2026 11:46:22 +0200 Jiebin Sun <jiebin.sun@intel.com>