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=-15.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 9FD60C43331 for ; Tue, 12 Nov 2019 18:38:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77887222C2 for ; Tue, 12 Nov 2019 18:38:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573583902; bh=GegQjfzUYdLIjtzfZwBrCmZHhq3xJnPjPgXxMRwpvF8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=QriGOK95jZXoU+twaN4IDaGcJHNVniKxbZDY50U/+6JDpG/WNoJBKXynL7MbFFtNB Ni3caaobzAN5iMKcK02JRmckr9eubnwJgAwiE0zsqnDEiFgiB4lVSwzBxvqZyALf6o xJ6STZ9WL66hZlxZpgIa7DDKr7fqqVMszzSzwG8A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727284AbfKLSiV (ORCPT ); Tue, 12 Nov 2019 13:38:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:56360 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726912AbfKLSiU (ORCPT ); Tue, 12 Nov 2019 13:38:20 -0500 Received: from quaco.ghostprotocols.net (unknown [177.195.211.83]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 79DEA21A49; Tue, 12 Nov 2019 18:38:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573583898; bh=GegQjfzUYdLIjtzfZwBrCmZHhq3xJnPjPgXxMRwpvF8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IAWVzR6WmvyolmvxNKI7ACby7EgabA9xHySgtr+MEhXXkiVmHzrgbnIMv4mwQ/Yqj fhnRbEib+fKp2lYzYNJrhL4LYscPyF+rJb8uSIxCekTJEiN6Ak8NyMjZNCSzYElFFM Qe0ldPEra75ABogKlxn9TPhYvFNNXCH4SdXQT9Eg= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho de Melo , Adrian Hunter , Andi Kleen Subject: [PATCH 02/15] perf symbols: Stop using map->groups, we can use kmaps instead Date: Tue, 12 Nov 2019 15:37:44 -0300 Message-Id: <20191112183757.28660-3-acme@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191112183757.28660-1-acme@kernel.org> References: <20191112183757.28660-1-acme@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnaldo Carvalho de Melo To test that that function is being called I just added a probe on that place, enabled it via 'perf trace' asking for at most 16 levels of backtraces, system wide, and then ran 'perf top' on another xterm, voilà: # perf probe -x ~/bin/perf dso__process_kernel_symbol Added new event: probe_perf:dso__process_kernel_symbol (on dso__process_kernel_symbol in /home/acme/bin/perf) You can now use it in all perf tools, such as: perf record -e probe_perf:dso__process_kernel_symbol -aR sleep 1 # perf trace -e probe_perf:dso__process_kernel_symbol/max-stack=16/ --max-events=2 # perf trace -e probe_perf:dso__process_kernel_symbol/max-stack=16/ --max-events=2 0.000 :17345/17345 probe_perf:dso__process_kernel_symbol(__probe_ip: 5680224) dso__process_kernel_symbol (/home/acme/bin/perf) dso__load_vmlinux (/home/acme/bin/perf) dso__load_vmlinux_path (/home/acme/bin/perf) dso__load (/home/acme/bin/perf) map__load (/home/acme/bin/perf) thread__find_map (/home/acme/bin/perf) machine__resolve (/home/acme/bin/perf) deliver_event (/home/acme/bin/perf) __ordered_events__flush.part.0 (/home/acme/bin/perf) process_thread (/home/acme/bin/perf) start_thread (/usr/lib64/libpthread-2.29.so) 0.064 :17345/17345 probe_perf:dso__process_kernel_symbol(__probe_ip: 5680224) dso__process_kernel_symbol (/home/acme/bin/perf) dso__load_vmlinux (/home/acme/bin/perf) dso__load_vmlinux_path (/home/acme/bin/perf) dso__load (/home/acme/bin/perf) map__load (/home/acme/bin/perf) thread__find_map (/home/acme/bin/perf) machine__resolve (/home/acme/bin/perf) deliver_event (/home/acme/bin/perf) __ordered_events__flush.part.0 (/home/acme/bin/perf) process_thread (/home/acme/bin/perf) start_thread (/usr/lib64/libpthread-2.29.so) # # perf stat -e probe_perf:dso__process_kernel_symbol ^C Performance counter stats for 'system wide': 107,308 probe_perf:dso__process_kernel_symbol 8.215399813 seconds time elapsed # Cc: Adrian Hunter Cc: Andi Kleen Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-5fy66x5hr5ct9pmw84jkiwvm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/symbol-elf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 66f4be1df573..16776d5fbaea 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -934,7 +934,7 @@ static int dso__process_kernel_symbol(struct dso *dso, struct map *map, * we still are sure to have a reference to this DSO via * *curr_map->dso. */ - dsos__add(&map->groups->machine->dsos, curr_dso); + dsos__add(&kmaps->machine->dsos, curr_dso); /* kmaps already got it */ map__put(curr_map); dso__set_loaded(curr_dso); -- 2.21.0