From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2AA383F39E9; Fri, 10 Jul 2026 08:43:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783673016; cv=none; b=WQiggOjCbXN8Ew6nfZVZvkzKL8Dt+RjovMceO47P1AoX3NPSOZhOuLx8HHW/vmDgF09A57PeQvlwEaHZxXPk+F+YbzzKaFMwWj5385f6tu84vWZwAEr6WKXcsO5Cqt3cJe/ug0xNCdfhOQKvWJIBr0Vkbtcvv2GG94eYXGXAtg4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783673016; c=relaxed/simple; bh=R5NEIwYZSgdrWu8wKRE5gn3sFWfLGw/F3DJGjMofMCw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oLUDb8q4UXfLjwhU0n2JKI6MX+1F/LKQxpi5nlOodVvs/TztMIhem3xYAQQKMsixYXi6FvYeBAgcqVum99JtGYGfDN8FWNemXbr3L7Os/zjPB5KJdwFJhfEXHA4cQgrTulpiOoL2gKVRJwc6uvGnscJfe/lStvsSBQN/iRUEYjQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=T0vk3SGF; arc=none smtp.client-ip=198.175.65.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="T0vk3SGF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1783673012; x=1815209012; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=R5NEIwYZSgdrWu8wKRE5gn3sFWfLGw/F3DJGjMofMCw=; b=T0vk3SGFfRPTYH27qt7ZX7ZKBhgMLNMgFKtBC8yyl071jpPwA+UuXzvj ztf1uqd5e7OvSKtBhCMalzVpeEFiO+xmYbwhegj37YjfZwZ5p2OntZtLN bTHZE3X+BZrLP1UJP8hTod7wuDH7LCSct7+PIZvZV1+cFsy+2lwYSKX75 +Cl+rI0wFHDajz+CoDUPpG85a/laSXlz8s8yEJplhWZG5VBXPjs3IO4+m j+Mn3YT85EjyZ5U5WZuyH+Z7CApv9Dp9ifSV/fMZJYUPrhZb3a31MZBBH FRjcLp2dFUeq6fquWPVCVv5WRKUTij1eUuKugWGVKD2by5Sd359UUcMEg w==; X-CSE-ConnectionGUID: UKr+ScjsR+K8MbCBvGV34A== X-CSE-MsgGUID: worGNcExTL6PBMGqG6Sd2Q== X-IronPort-AV: E=McAfee;i="6800,10657,11841"; a="84390899" X-IronPort-AV: E=Sophos;i="6.25,154,1779174000"; d="scan'208";a="84390899" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jul 2026 01:43:31 -0700 X-CSE-ConnectionGUID: yYdJpvf0RbaICg6wVRuoiA== X-CSE-MsgGUID: EHre6RuQR0id7FpeGZYuTg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,154,1779174000"; d="scan'208";a="258435462" Received: from linux-pnp-gnr-1.sh.intel.com ([10.239.83.186]) by orviesa003.jf.intel.com with ESMTP; 10 Jul 2026 01:43:26 -0700 From: Jiebin Sun To: Namhyung Kim , Arnaldo Carvalho de Melo , Ingo Molnar , Peter Zijlstra Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Jiebin Sun , Adrian Hunter , Alexander Shishkin , Dapeng Mi , Ian Rogers , James Clark , Jiri Olsa , Mark Rutland , Thomas Falcon , Tianyou Li , Wangyang Guo Subject: [PATCH v2 12/14] perf c2c: add function view browser UI Date: Fri, 10 Jul 2026 16:42:45 +0800 Message-ID: <20260710084247.3576706-13-jiebin.sun@intel.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260710084247.3576706-1-jiebin.sun@intel.com> References: <20260626070355.1556721-1-jiebin.sun@intel.com> <20260710084247.3576706-1-jiebin.sun@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace the stub perf_c2c__browse_function_view() with the full interactive browser implementation: - c2c_function_browser__new(): create browser with hierarchy support, disabling callchains for clean function-level display - c2c_function_browser__browse_cacheline_detail(): drill into cacheline detail view via 'd' key - c2c_function_browser__title(): display entry count in title bar - c2c_function_browser__delete(): cleanup on exit The browser saves/restores symbol_conf.use_callchain to avoid corrupting the callchain display in the cacheline view after returning from the function view. The browser entry point perf_c2c__browse_function_view() is wired up by the next patch, which adds the TAB key in the cacheline view to switch into the function view. Signed-off-by: Jiebin Sun Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Arnaldo Carvalho de Melo Cc: Dapeng Mi Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Falcon Reviewed-by: Tianyou Li Reviewed-by: Wangyang Guo --- tools/perf/ui/browsers/c2c-function.c | 159 +++++++++++++++++++++++++- 1 file changed, 153 insertions(+), 6 deletions(-) diff --git a/tools/perf/ui/browsers/c2c-function.c b/tools/perf/ui/browsers/c2c-function.c index 80e032d5e31c..e23f90ec282c 100644 --- a/tools/perf/ui/browsers/c2c-function.c +++ b/tools/perf/ui/browsers/c2c-function.c @@ -2,7 +2,7 @@ /* * C2C Function Browser - function-level cacheline sharing analysis * - * Planned UI: 3-level hierarchy showing which functions share cachelines (not implemented yet): + * Displays a 3-level hierarchy showing which functions share cachelines: * Level 1: Primary functions sorted by Cycles % (estimated load cycles) * Level 2: Other functions sharing cachelines with the level-1 function * Level 3: Specific shared cachelines between each pair of functions @@ -44,7 +44,7 @@ struct perf_c2c_ext { u64 total_cycles; }; -static struct perf_c2c_ext c2c_ext __maybe_unused; +static struct perf_c2c_ext c2c_ext; struct c2c_function_browser { struct hist_browser hb; @@ -1335,7 +1335,7 @@ static void c2c_function__finalize(void) * L2: sharing functions referenced from each L1 function * L3: cachelines that pair L1 with L2 */ -static __maybe_unused int build_function_view_hierarchy(void) +static int build_function_view_hierarchy(void) { static const char output_fields[] = "cycles_percent,total_stores,iaddr_symbol,symbol_view,cacheline_symbol"; @@ -1409,8 +1409,155 @@ static __maybe_unused int build_function_view_hierarchy(void) return ret; } -int perf_c2c__browse_function_view(struct hists *hists __maybe_unused) +static int c2c_function_browser__title(struct hist_browser *browser, + char *bf, size_t size) { - ui__warning("C2C function view is not implemented yet.\n"); - return -ENOSYS; + scnprintf(bf, size, + "Shared Data Functions Table (%" PRIu64 " entries, sorted on Cycles %%)", + browser->nr_non_filtered_entries); + return 0; +} + +static struct c2c_function_browser *c2c_function_browser__new(struct hists *hists) +{ + struct c2c_function_browser *browser; + + if (!hists) + return NULL; + + browser = zalloc(sizeof(*browser)); + if (!browser) + return NULL; + + hist_browser__init(&browser->hb, hists); + + browser->hb.title = c2c_function_browser__title; + browser->hb.c2c_filter = true; + browser->hb.show_headers = true; + /* Keep title line count consistent with forcing headers on. */ + browser->hb.b.extra_title_lines = hists->hpp_list->nr_header_lines; + browser->hb.min_pcnt = 0.0; + + /* + * Note: symbol_conf.report_hierarchy is deliberately left unset. + * The generic browser still descends into hroot_out children via + * rb_hierarchy_next()/can_goto_child(), which key off he->unfolded, + * so 'e'/'+' expands L1 -> L2 -> L3 correctly. Setting the flag would + * additionally make hist_entry__delete() recurse hroot_out and free + * each child, but our children borrow thread/ms (see + * c2c_child_entry__alloc()), so that would underflow their refcounts. + * Teardown is handled by c2c_he__free_hierarchy() instead. + */ + return browser; +} + +/* + * c2c_function_browser__delete - Free function browser + */ +static void c2c_function_browser__delete(struct c2c_function_browser *browser) +{ + free(browser); +} + +static int c2c_function_browser__browse_cacheline_detail(struct hist_entry *he_selection, + struct hists *hists) +{ + struct rb_node *nd; + u64 cl_addr; + + if (!he_selection || !he_selection->parent_he || + !he_selection->parent_he->parent_he || !he_selection->mem_info) + return -1; + + cl_addr = cl_address(mem_info__daddr(he_selection->mem_info)->addr, chk_double_cl); + + for (nd = rb_first_cached(&hists->entries); nd; nd = rb_next(nd)) { + struct hist_entry *he_cl = rb_entry(nd, struct hist_entry, rb_node); + u64 this_cl; + + if (!he_cl->mem_info) + continue; + + this_cl = cl_address(mem_info__daddr(he_cl->mem_info)->addr, chk_double_cl); + if (this_cl == cl_addr) + return perf_c2c__browse_cacheline(he_cl); + } + + return -1; +} + +/* + * perf_c2c__browse_function_view - Browse function view with TAB key support + * @hists: Main cacheline histograms + * + * Returns: 0 on success, negative error code on failure + */ +int perf_c2c__browse_function_view(struct hists *hists) +{ + struct c2c_function_browser *sym_browser; + bool saved_use_callchain = symbol_conf.use_callchain; + int key, ret; + static const char help[] = + " d Display cacheline details for the selected entry\n" + " e/+ Expand/collapse the selected entry\n" + " TAB/ESC/q Return to the cacheline view\n"; + + if (!hists) + return -EINVAL; + + /* Disable callchain before building so no callchain structs are allocated. */ + symbol_conf.use_callchain = false; + + ret = build_function_view_hierarchy(); + if (ret) { + ui__error("Failed to build function view hierarchy (ret=%d)\n", ret); + goto out; + } + + sym_browser = c2c_function_browser__new(&c2c_ext.function_hists.hists); + if (!sym_browser) { + ret = -ENOMEM; + goto out; + } + + /* Reset abort key so we can receive Ctrl-C as a key. */ + SLang_reset_tty(); + SLang_init_tty(0, 0, 0); + SLtty_set_suspend_state(true); + + sym_browser->hb.nr_non_filtered_entries = + c2c_ext.function_hists.hists.nr_non_filtered_entries; + + while (1) { + key = hist_browser__run(&sym_browser->hb, "? - help", true, 0); + + switch (key) { + case 'q': + case K_TAB: + case K_ESC: + goto browser_done; + case 'd': + /* Cacheline detail honors the user's callchain setting. */ + symbol_conf.use_callchain = saved_use_callchain; + c2c_function_browser__browse_cacheline_detail(sym_browser->hb.he_selection, + hists); + /* Preserve any toggle made in the detail view, then + * re-disable callchain for the function view. + */ + saved_use_callchain = symbol_conf.use_callchain; + symbol_conf.use_callchain = false; + break; + case '?': + ui_browser__help_window(&sym_browser->hb.b, help); + break; + default: + break; + } + } + +browser_done: + c2c_function_browser__delete(sym_browser); +out: + symbol_conf.use_callchain = saved_use_callchain; + return ret; } -- 2.52.0