From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752706AbcLFDnN (ORCPT ); Mon, 5 Dec 2016 22:43:13 -0500 Received: from mail-pg0-f67.google.com ([74.125.83.67]:35122 "EHLO mail-pg0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751790AbcLFDlY (ORCPT ); Mon, 5 Dec 2016 22:41:24 -0500 From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Ingo Molnar , Peter Zijlstra , Jiri Olsa , LKML , David Ahern , Andi Kleen , Minchan Kim Subject: [PATCH 02/10] perf tools: Introduce callchain_cursor__copy() Date: Tue, 6 Dec 2016 12:40:02 +0900 Message-Id: <20161206034010.6499-3-namhyung@kernel.org> X-Mailer: git-send-email 2.10.1 In-Reply-To: <20161206034010.6499-1-namhyung@kernel.org> References: <20161206034010.6499-1-namhyung@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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; -- 2.10.1