From patchwork Mon Oct 5 22:43:59 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 7332111 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id ABD41BEEA4 for ; Mon, 5 Oct 2015 22:44:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D64CF2066C for ; Mon, 5 Oct 2015 22:44:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ECBB62066B for ; Mon, 5 Oct 2015 22:44:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752438AbbJEWoi (ORCPT ); Mon, 5 Oct 2015 18:44:38 -0400 Received: from mail.kernel.org ([198.145.29.136]:50387 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752135AbbJEWoP (ORCPT ); Mon, 5 Oct 2015 18:44:15 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F00452066F; Mon, 5 Oct 2015 22:44:13 +0000 (UTC) Received: from localhost (mobile-166-171-248-099.mycingular.net [166.171.248.99]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 230272066C; Mon, 5 Oct 2015 22:44:13 +0000 (UTC) From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH 2/3] f2fs: add a tracepoint for background gc Date: Mon, 5 Oct 2015 15:43:59 -0700 Message-Id: <1444085040-12843-2-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 2.1.1 In-Reply-To: <1444085040-12843-1-git-send-email-jaegeuk@kernel.org> References: <1444085040-12843-1-git-send-email-jaegeuk@kernel.org> X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch introduces a tracepoint to monitor background gc behaviors. Signed-off-by: Jaegeuk Kim --- fs/f2fs/gc.c | 3 +++ include/trace/events/f2fs.h | 28 ++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index e627c19..e7cec86 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -77,6 +77,9 @@ static int gc_thread_func(void *data) stat_inc_bggc_count(sbi); + trace_f2fs_background_gc(sbi->sb, wait_ms, + prefree_segments(sbi), free_segments(sbi)); + /* if return value is not zero, no victim was selected */ if (f2fs_gc(sbi, test_opt(sbi, FORCE_FG_GC))) wait_ms = gc_th->no_gc_sleep_time; diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index 6aa63d9..7de751d 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -514,6 +514,34 @@ TRACE_EVENT(f2fs_map_blocks, __entry->ret) ); +TRACE_EVENT(f2fs_background_gc, + + TP_PROTO(struct super_block *sb, long wait_ms, + unsigned int prefree, unsigned int free), + + TP_ARGS(sb, wait_ms, prefree, free), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(long, wait_ms) + __field(unsigned int, prefree) + __field(unsigned int, free) + ), + + TP_fast_assign( + __entry->dev = sb->s_dev; + __entry->wait_ms = wait_ms; + __entry->prefree = prefree; + __entry->free = free; + ), + + TP_printk("dev = (%d,%d), wait_ms = %ld, prefree = %u, free = %u", + show_dev(__entry), + __entry->wait_ms, + __entry->prefree, + __entry->free) +); + TRACE_EVENT(f2fs_get_victim, TP_PROTO(struct super_block *sb, int type, int gc_type,