From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4F24C32789 for ; Fri, 2 Nov 2018 10:26:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A653A20657 for ; Fri, 2 Nov 2018 10:26:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A653A20657 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726585AbeKBTc7 (ORCPT ); Fri, 2 Nov 2018 15:32:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33360 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725990AbeKBTc7 (ORCPT ); Fri, 2 Nov 2018 15:32:59 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8CF54369D3; Fri, 2 Nov 2018 10:26:19 +0000 (UTC) Received: from krava (unknown [10.40.205.35]) by smtp.corp.redhat.com (Postfix) with SMTP id 8F24518B96; Fri, 2 Nov 2018 10:26:17 +0000 (UTC) Date: Fri, 2 Nov 2018 11:26:16 +0100 From: Jiri Olsa To: Xin Long Cc: LKML , linux-perf-users@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Namhyung Kim Subject: Re: perf script doesn't dump a normal call trace Message-ID: <20181102102616.GC5458@krava> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 02 Nov 2018 10:26:19 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 02, 2018 at 03:36:13PM +0900, Xin Long wrote: > On upstream kernel(4.19) or RHEL-8 kernel(4.18.0): > > # perf record -e 'skb:consume_skb' -ag > ^C[ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.612 MB perf.data (634 samples) ] > > # perf script > swapper 0 [009] 274370.117711: skb:consume_skb: skbaddr=0xffff962c591d5b00 > ffffffffa4abe534 consume_skb+0x64 ([kernel.kallsyms]) > > kworker/9:1-eve 926 [009] 274370.117729: skb:consume_skb: > skbaddr=0xffff962c591d5b00 > ffffffffa4abe534 consume_skb+0x64 ([kernel.kallsyms]) > > kworker/9:1-eve 926 [009] 274370.117732: skb:consume_skb: > skbaddr=0xffff962c591d4900 > ffffffffa4abe534 consume_skb+0x64 ([kernel.kallsyms]) > > swapper 0 [009] 274370.145528: skb:consume_skb: skbaddr=0xffff962c591d4900 > ffffffffa4abe534 consume_skb+0x64 ([kernel.kallsyms]) > > kworker/9:1-eve 926 [009] 274370.145545: skb:consume_skb: > skbaddr=0xffff962c591d4900 > ffffffffa4abe534 consume_skb+0x64 ([kernel.kallsyms]) > > kworker/9:1-eve 926 [009] 274370.145547: skb:consume_skb: > skbaddr=0xffff962c591d5b00 > ffffffffa4abe534 consume_skb+0x64 ([kernel.kallsyms]) > > swapper 0 [009] 274370.173443: skb:consume_skb: skbaddr=0xffff962c591d5b00 > ffffffffa4abe534 consume_skb+0x64 ([kernel.kallsyms]) I can see that on upstream as well, probably something within tracepoint entry code, because I have it working nicely when from kprobe, like: [root@ibm-x3650m4-02 perf]# ./perf probe 'consume_skb' [root@ibm-x3650m4-02 perf]# ./perf record -g -e probe:consume_skb* -aR ^C jirka