Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965747AbcKOBlk (ORCPT ); Mon, 14 Nov 2016 20:41:40 -0500 Received: from merlin.infradead.org ([205.233.59.134]:35562 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S940999AbcKOBj2 (ORCPT ); Mon, 14 Nov 2016 20:39:28 -0500 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Jin Yao , Jiri Olsa , Kan Liang , Linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo Subject: [PATCH 13/15] perf report: Calculate and return the branch flag counting Date: Mon, 14 Nov 2016 22:38:45 -0300 Message-Id: <1479173927-24613-14-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1479173927-24613-1-git-send-email-acme@kernel.org> References: <1479173927-24613-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7831 Lines: 277 From: Jin Yao Create some branch counters in per callchain list entry. Each counter is for a branch flag. For example, predicted_count counts all the *predicted* branches. The counters get updated by processing the callchain cursor nodes. It also provides functions to retrieve or print the values of counters in callchain list. Besides the counting for branch flags, it also counts and returns the average number of iterations. Signed-off-by: Yao Jin Acked-by: Andi Kleen Cc: Jiri Olsa Cc: Kan Liang Cc: Linux-kernel@vger.kernel.org Cc: Yao Jin Link: http://lkml.kernel.org/r/1477876794-30749-4-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/callchain.c | 189 +++++++++++++++++++++++++++++++++++++++++++- tools/perf/util/callchain.h | 14 ++++ 2 files changed, 202 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c index 138a415fad0d..823befd8209a 100644 --- a/tools/perf/util/callchain.c +++ b/tools/perf/util/callchain.c @@ -438,6 +438,21 @@ fill_node(struct callchain_node *node, struct callchain_cursor *cursor) call->ip = cursor_node->ip; call->ms.sym = cursor_node->sym; call->ms.map = cursor_node->map; + + if (cursor_node->branch) { + call->branch_count = 1; + + if (cursor_node->branch_flags.predicted) + call->predicted_count = 1; + + if (cursor_node->branch_flags.abort) + call->abort_count = 1; + + call->cycles_count = cursor_node->branch_flags.cycles; + call->iter_count = cursor_node->nr_loop_iter; + call->samples_count = cursor_node->samples; + } + list_add_tail(&call->list, &node->val); callchain_cursor_advance(cursor); @@ -497,8 +512,23 @@ static enum match_result match_chain(struct callchain_cursor_node *node, right = node->ip; } - if (left == right) + if (left == right) { + if (node->branch) { + cnode->branch_count++; + + if (node->branch_flags.predicted) + cnode->predicted_count++; + + if (node->branch_flags.abort) + cnode->abort_count++; + + cnode->cycles_count += node->branch_flags.cycles; + cnode->iter_count += node->nr_loop_iter; + cnode->samples_count += node->samples; + } + return MATCH_EQ; + } return left > right ? MATCH_GT : MATCH_LT; } @@ -947,6 +977,163 @@ int callchain_node__fprintf_value(struct callchain_node *node, return 0; } +static void callchain_counts_value(struct callchain_node *node, + u64 *branch_count, u64 *predicted_count, + u64 *abort_count, u64 *cycles_count) +{ + struct callchain_list *clist; + + list_for_each_entry(clist, &node->val, list) { + if (branch_count) + *branch_count += clist->branch_count; + + if (predicted_count) + *predicted_count += clist->predicted_count; + + if (abort_count) + *abort_count += clist->abort_count; + + if (cycles_count) + *cycles_count += clist->cycles_count; + } +} + +static int callchain_node_branch_counts_cumul(struct callchain_node *node, + u64 *branch_count, + u64 *predicted_count, + u64 *abort_count, + u64 *cycles_count) +{ + struct callchain_node *child; + struct rb_node *n; + + n = rb_first(&node->rb_root_in); + while (n) { + child = rb_entry(n, struct callchain_node, rb_node_in); + n = rb_next(n); + + callchain_node_branch_counts_cumul(child, branch_count, + predicted_count, + abort_count, + cycles_count); + + callchain_counts_value(child, branch_count, + predicted_count, abort_count, + cycles_count); + } + + return 0; +} + +int callchain_branch_counts(struct callchain_root *root, + u64 *branch_count, u64 *predicted_count, + u64 *abort_count, u64 *cycles_count) +{ + if (branch_count) + *branch_count = 0; + + if (predicted_count) + *predicted_count = 0; + + if (abort_count) + *abort_count = 0; + + if (cycles_count) + *cycles_count = 0; + + return callchain_node_branch_counts_cumul(&root->node, + branch_count, + predicted_count, + abort_count, + cycles_count); +} + +static int callchain_counts_printf(FILE *fp, char *bf, int bfsize, + u64 branch_count, u64 predicted_count, + u64 abort_count, u64 cycles_count, + u64 iter_count, u64 samples_count) +{ + double predicted_percent = 0.0; + const char *null_str = ""; + char iter_str[32]; + char *str; + u64 cycles = 0; + + if (branch_count == 0) { + if (fp) + return fprintf(fp, " (calltrace)"); + + return scnprintf(bf, bfsize, " (calltrace)"); + } + + if (iter_count && samples_count) { + scnprintf(iter_str, sizeof(iter_str), + ", iterations:%" PRId64 "", + iter_count / samples_count); + str = iter_str; + } else + str = (char *)null_str; + + predicted_percent = predicted_count * 100.0 / branch_count; + cycles = cycles_count / branch_count; + + if ((predicted_percent >= 100.0) && (abort_count == 0)) { + if (fp) + return fprintf(fp, " (cycles:%" PRId64 "%s)", + cycles, str); + + return scnprintf(bf, bfsize, " (cycles:%" PRId64 "%s)", + cycles, str); + } + + if ((predicted_percent < 100.0) && (abort_count == 0)) { + if (fp) + return fprintf(fp, + " (predicted:%.1f%%, cycles:%" PRId64 "%s)", + predicted_percent, cycles, str); + + return scnprintf(bf, bfsize, + " (predicted:%.1f%%, cycles:%" PRId64 "%s)", + predicted_percent, cycles, str); + } + + if (fp) + return fprintf(fp, + " (predicted:%.1f%%, abort:%" PRId64 ", cycles:%" PRId64 "%s)", + predicted_percent, abort_count, cycles, str); + + return scnprintf(bf, bfsize, + " (predicted:%.1f%%, abort:%" PRId64 ", cycles:%" PRId64 "%s)", + predicted_percent, abort_count, cycles, str); +} + +int callchain_list_counts__printf_value(struct callchain_node *node, + struct callchain_list *clist, + FILE *fp, char *bf, int bfsize) +{ + u64 branch_count, predicted_count; + u64 abort_count, cycles_count; + u64 iter_count = 0, samples_count = 0; + + branch_count = clist->branch_count; + predicted_count = clist->predicted_count; + abort_count = clist->abort_count; + cycles_count = clist->cycles_count; + + if (node) { + struct callchain_list *call; + + list_for_each_entry(call, &node->val, list) { + iter_count += call->iter_count; + samples_count += call->samples_count; + } + } + + return callchain_counts_printf(fp, bf, bfsize, branch_count, + predicted_count, abort_count, + cycles_count, iter_count, samples_count); +} + static void free_callchain_node(struct callchain_node *node) { struct callchain_list *list, *tmp; diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index df6329d1c350..d9c70dccf06a 100644 --- a/tools/perf/util/callchain.h +++ b/tools/perf/util/callchain.h @@ -111,6 +111,12 @@ struct callchain_list { bool unfolded; bool has_children; }; + u64 branch_count; + u64 predicted_count; + u64 abort_count; + u64 cycles_count; + u64 iter_count; + u64 samples_count; char *srcline; struct list_head list; }; @@ -263,8 +269,16 @@ char *callchain_node__scnprintf_value(struct callchain_node *node, int callchain_node__fprintf_value(struct callchain_node *node, FILE *fp, u64 total); +int callchain_list_counts__printf_value(struct callchain_node *node, + struct callchain_list *clist, + FILE *fp, char *bf, int bfsize); + void free_callchain(struct callchain_root *root); void decay_callchain(struct callchain_root *root); int callchain_node__make_parent_list(struct callchain_node *node); +int callchain_branch_counts(struct callchain_root *root, + u64 *branch_count, u64 *predicted_count, + u64 *abort_count, u64 *cycles_count); + #endif /* __PERF_CALLCHAIN_H */ -- 2.7.4