From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754085AbcIBOAj (ORCPT ); Fri, 2 Sep 2016 10:00:39 -0400 Received: from szxga03-in.huawei.com ([119.145.14.66]:42693 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752956AbcIBOAY (ORCPT ); Fri, 2 Sep 2016 10:00:24 -0400 From: Wang Nan To: CC: , , Wang Nan , Hou Pengyang , He Kuang , Arnaldo Carvalho de Melo Subject: [PATCH 3/3] perf record: Mark MAP_HUGETLB during synthesizing mmap events Date: Fri, 2 Sep 2016 13:59:47 +0000 Message-ID: <1472824787-107939-4-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1472824787-107939-1-git-send-email-wangnan0@huawei.com> References: <1472824787-107939-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020204.57C985E7.00E3,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 5415aad71089f5510878e0fe5433d254 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org During 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 perf top). Signed-off-by: Wang Nan Cc: Hou Pengyang Cc: He Kuang Cc: Arnaldo Carvalho de Melo --- tools/perf/util/event.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index e20438b..4c2abdf 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 +249,8 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool, bool truncation = false; unsigned long long timeout = proc_map_timeout * 1000000ULL; int rc = 0; + const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); + int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; if (machine__is_default_guest(machine)) return 0; @@ -342,6 +345,10 @@ out: if (!strcmp(execname, "")) strcpy(execname, anonstr); + if (!strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) { + strcpy(execname, anonstr); + event->mmap2.flags |= MAP_HUGETLB; + } size = strlen(execname) + 1; memcpy(event->mmap2.filename, execname, size); -- 1.8.3.4