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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 7D18FC433DF for ; Tue, 21 Jul 2020 00:38:54 +0000 (UTC) Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5085A208E4; Tue, 21 Jul 2020 00:38:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sourceforge.net header.i=@sourceforge.net header.b="PGkLTBhg"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sf.net header.i=@sf.net header.b="Nmojt6c3"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="cVZijLJD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5085A208E4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linux-f2fs-devel-bounces@lists.sourceforge.net Received: from [127.0.0.1] (helo=sfs-ml-1.v29.lw.sourceforge.com) by sfs-ml-1.v29.lw.sourceforge.com with esmtp (Exim 4.90_1) (envelope-from ) id 1jxgJ2-0001x2-Vi; Tue, 21 Jul 2020 00:38:52 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-1.v29.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jxgIz-0001wq-PE for linux-f2fs-devel@lists.sourceforge.net; Tue, 21 Jul 2020 00:38:49 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=DNgIftFNoZdIR8JDpgMZkHpUs9DY2vj6HR4gUFOpztc=; b=PGkLTBhgMZTCEchS49rEYTL1zJ beqCysIp2dDvcGZprcr4myF02gErVszurXLtWcY6boVfO56R5qv9CKHzGScp6uLZOw+dtNQb9Ncrl G2nvyMfDLnlLHiXxt3xnTojlSFyWjibpT9eJCFrsdX2vlkGYNTomqPKt+B2Rrv48EQCs=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject:Cc:To:From :Sender:Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive; bh=DNgIftFNoZdIR8JDpgMZkHpUs9DY2vj6HR4gUFOpztc=; b=N mojt6c3VGTVvKTXFjbQUvuiPf8Y5Xyl1cyNEd9dd3T6vDDPA8Xz/W1rzmIZl04+ZMQ36DfSgNzWPO quFZTdH2OZfiBgqQmyT9dGaq3/wZZPHJizXMMcOt+Pncuyy9mO4by2T4XUzNWTWvPAbCLHnR48G+g JZfnQfFVspblxPUE=; Received: from mail.kernel.org ([198.145.29.99]) by sfi-mx-4.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.2) id 1jxgIx-00ERME-M0 for linux-f2fs-devel@lists.sourceforge.net; Tue, 21 Jul 2020 00:38:49 +0000 Received: from localhost (unknown [104.132.1.66]) (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 83EA3208E4; Tue, 21 Jul 2020 00:38:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595291916; bh=lg8SYlBLo99XrJ8hqhGxr4cCIq+bw6mxuOXkqLJbJRQ=; h=From:To:Cc:Subject:Date:From; b=cVZijLJDh+pvjZVdXHn5sU1nicrUZ0/EWopnOP5SGMaMtAtvrwrFYydHZHYDmW/Zk W+kc9SwJ111GKHRURSxk3xxZONEYYL93KEwlLd9yvWD4+FyHEd24KCsqqQNhGEaksV ohvxIqFY00KPftG9iXn2Z/WeZ36tF+12APajzwWw= From: Jaegeuk Kim To: linux-f2fs-devel@lists.sourceforge.net Date: Mon, 20 Jul 2020 17:38:32 -0700 Message-Id: <20200721003834.2754992-1-jaegeuk@kernel.org> X-Mailer: git-send-email 2.28.0.rc0.105.gf9edc3c819-goog MIME-Version: 1.0 X-Headers-End: 1jxgIx-00ERME-M0 Subject: [f2fs-dev] [PATCH 1/3] f2fs_io: add mmap read operation X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jaegeuk Kim Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net This patch adds an option, mmap, when reading data. Signed-off-by: Jaegeuk Kim --- tools/f2fs_io/f2fs_io.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c index 30544c1..6266454 100644 --- a/tools/f2fs_io/f2fs_io.c +++ b/tools/f2fs_io/f2fs_io.c @@ -489,15 +489,18 @@ static void do_write(int argc, char **argv, const struct cmd_desc *cmd) "IO can be\n" \ " buffered : buffered IO\n" \ " dio : direct IO\n" \ +" mmap : mmap IO\n" \ static void do_read(int argc, char **argv, const struct cmd_desc *cmd) { u64 buf_size = 0, ret = 0, read_cnt = 0; u64 offset; char *buf = NULL; + char *data; char *print_buf = NULL; unsigned bs, count, i, print_bytes; int flags = 0; + int do_mmap = 0; int fd; if (argc != 7) { @@ -518,6 +521,8 @@ static void do_read(int argc, char **argv, const struct cmd_desc *cmd) count = atoi(argv[3]); if (!strcmp(argv[4], "dio")) flags |= O_DIRECT; + else if (!strcmp(argv[4], "mmap")) + do_mmap = 1; else if (strcmp(argv[4], "buffered")) die("Wrong IO type"); @@ -529,8 +534,20 @@ static void do_read(int argc, char **argv, const struct cmd_desc *cmd) fd = xopen(argv[6], O_RDONLY | flags, 0); + if (do_mmap) { + data = mmap(NULL, count * buf_size, PROT_READ, + MAP_SHARED, fd, offset); + if (data == MAP_FAILED) + die("Mmap failed"); + } + for (i = 0; i < count; i++) { - ret = pread(fd, buf, buf_size, offset + buf_size * i); + if (do_mmap) { + memcpy(buf, data + offset + buf_size * i, buf_size); + ret = buf_size; + } else { + ret = pread(fd, buf, buf_size, offset + buf_size * i); + } if (ret != buf_size) break; -- 2.28.0.rc0.105.gf9edc3c819-goog _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel