From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758320AbcIHUtS (ORCPT ); Thu, 8 Sep 2016 16:49:18 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:48728 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756519AbcIHUqe (ORCPT ); Thu, 8 Sep 2016 16:46:34 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Wang Nan , He Kuang , Hou Pengyang , Zefan Li , Arnaldo Carvalho de Melo Subject: [PATCH 08/12] perf record: Mark MAP_HUGETLB when synthesizing mmap events Date: Thu, 8 Sep 2016 17:46:17 -0300 Message-Id: <1473367581-5996-9-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1473367581-5996-1-git-send-email-acme@kernel.org> References: <1473367581-5996-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.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: Wang Nan When synthesizing mmap events, add MAP_HUGETLB map flag if the source of mapping is file in hugetlbfs. After this patch, perf can identify hugetlb mapping even if perf is started after the mapping of huge pages (like with 'perf top'). Signed-off-by: Wang Nan Reviewed-by: Nilay Vaish Cc: He Kuang Cc: Hou Pengyang Cc: Zefan Li Link: http://lkml.kernel.org/r/1473137909-142064-4-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/event.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 9ad7d32dba2b..6c3017139c67 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -1,5 +1,6 @@ #include #include +#include #include "event.h" #include "debug.h" #include "hist.h" @@ -248,6 +249,10 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool, bool truncation = false; unsigned long long timeout = proc_map_timeout * 1000000ULL; int rc = 0; +#ifdef MAP_HUGETLB + const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); + int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; +#endif if (machine__is_default_guest(machine)) return 0; @@ -342,6 +347,12 @@ out: if (!strcmp(execname, "")) strcpy(execname, anonstr); +#ifdef MAP_HUGETLB + if (!strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) { + strcpy(execname, anonstr); + event->mmap2.flags |= MAP_HUGETLB; + } +#endif size = strlen(execname) + 1; memcpy(event->mmap2.filename, execname, size); -- 2.7.4