From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756044AbbCLVb4 (ORCPT ); Thu, 12 Mar 2015 17:31:56 -0400 Received: from mail.kernel.org ([198.145.29.136]:42250 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161105AbbCLV33 (ORCPT ); Thu, 12 Mar 2015 17:29:29 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, He Kuang , Jiri Olsa , Paul Mackerras , Peter Zijlstra , Wang Nan , Arnaldo Carvalho de Melo Subject: [PATCH 17/24] perf hists browser: Fix UI bug after fold/unfold Date: Thu, 12 Mar 2015 18:27:57 -0300 Message-Id: <1426195684-20046-18-git-send-email-acme@kernel.org> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1426195684-20046-1-git-send-email-acme@kernel.org> References: <1426195684-20046-1-git-send-email-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: He Kuang In perf hists browser, the fold/unfold stat of each hist entry is recorded but hb->nr_callchain_rows loses its value after zoom out and zoom in back. This causes a wrong row cursor range that restrict user to move down anymore. This bug can be reproduced as follows: $ perf record -g -e syscalls:* ls $ perf report Available samples ================================================================ 2 syscalls:sys_enter_mprotect <= [enter one of the entries] 2 syscalls:sys_exit_mprotect 13 syscalls:sys_enter_brk ... In the hists brower, unfold some of the items, now the cursor can reach to any rows: Children Self Command Shared Object Symbol ================================================================ - 100.00% 100.00% ls libuClibc-0.9.33.2.so [.] lstat64 - lstat64 16.67% 0x6469702e64 8.33% 0x646970 8.33% 0x617461 8.33% 0x65 - 16.67% 0.00% ls [unknown] [.]0x6469702e64 0x6469702e64 <= [cursor can reach to bottom line, everything is ok] Now, zoom back to "Available samples" and enter again: Children Self Command Shared Object Symbol ================================================================ - 100.00% 100.00% ls libuClibc-0.9.33.2.so [.] lstat64 - lstat64 16.67% 0x6469702e64 8.33% 0x646970 8.33% 0x617461 <= [cursor may stop here, can't move down anymore] 8.33% 0x65 - 16.67% 0.00% ls [unknown] [.]0x6469702e64 0x6469702e64 This patch recalculates hb->nr_callchain_rows to fix the bug. Signed-off-by: He Kuang Acked-by: Namhyung Kim Cc: Jiri Olsa Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Wang Nan Link: http://lkml.kernel.org/r/1426144909-18951-1-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/ui/browsers/hists.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index ad312d91caed..49eddeb81458 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -48,6 +48,24 @@ static bool hist_browser__has_filter(struct hist_browser *hb) return hists__has_filter(hb->hists) || hb->min_pcnt; } +static int hist_browser__get_folding(struct hist_browser *browser) +{ + struct rb_node *nd; + struct hists *hists = browser->hists; + int unfolded_rows = 0; + + for (nd = rb_first(&hists->entries); + (nd = hists__filter_entries(nd, browser->min_pcnt)) != NULL; + nd = rb_next(nd)) { + struct hist_entry *he = + rb_entry(nd, struct hist_entry, rb_node); + + if (he->ms.unfolded) + unfolded_rows += he->nr_rows; + } + return unfolded_rows; +} + static u32 hist_browser__nr_entries(struct hist_browser *hb) { u32 nr_entries; @@ -57,6 +75,7 @@ static u32 hist_browser__nr_entries(struct hist_browser *hb) else nr_entries = hb->hists->nr_entries; + hb->nr_callchain_rows = hist_browser__get_folding(hb); return nr_entries + hb->nr_callchain_rows; } -- 1.9.3