From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932753AbcLGQxv (ORCPT ); Wed, 7 Dec 2016 11:53:51 -0500 Received: from merlin.infradead.org ([205.233.59.134]:39384 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932685AbcLGQxs (ORCPT ); Wed, 7 Dec 2016 11:53:48 -0500 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Namhyung Kim , Andi Kleen , David Ahern , Jiri Olsa , Minchan Kim , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH 07/10] perf callchain: Introduce callchain_cursor__copy() Date: Wed, 7 Dec 2016 13:53:32 -0300 Message-Id: <20161207165335.22835-8-acme@kernel.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20161207165335.22835-1-acme@kernel.org> References: <20161207165335.22835-1-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 From: Namhyung Kim The callchain_cursor__copy() function is to save current callchain captured by a cursor. It'll be used to keep callchains when switching to idle task for each cpu. Signed-off-by: Namhyung Kim Cc: Andi Kleen Cc: David Ahern Cc: Jiri Olsa Cc: Minchan Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20161206034010.6499-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/callchain.c | 27 +++++++++++++++++++++++++++ tools/perf/util/callchain.h | 3 +++ 2 files changed, 30 insertions(+) diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c index 823befd8209a..42922512c1c6 100644 --- a/tools/perf/util/callchain.c +++ b/tools/perf/util/callchain.c @@ -1234,3 +1234,30 @@ int callchain_node__make_parent_list(struct callchain_node *node) } return -ENOMEM; } + +int callchain_cursor__copy(struct callchain_cursor *dst, + struct callchain_cursor *src) +{ + int rc = 0; + + callchain_cursor_reset(dst); + callchain_cursor_commit(src); + + while (true) { + struct callchain_cursor_node *node; + + node = callchain_cursor_current(src); + if (node == NULL) + break; + + rc = callchain_cursor_append(dst, node->ip, node->map, node->sym, + node->branch, &node->branch_flags, + node->nr_loop_iter, node->samples); + if (rc) + break; + + callchain_cursor_advance(src); + } + + return rc; +} diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index d9c70dccf06a..35c8e379530f 100644 --- a/tools/perf/util/callchain.h +++ b/tools/perf/util/callchain.h @@ -216,6 +216,9 @@ static inline void callchain_cursor_advance(struct callchain_cursor *cursor) cursor->pos++; } +int callchain_cursor__copy(struct callchain_cursor *dst, + struct callchain_cursor *src); + struct option; struct hist_entry; -- 2.9.3