From owner-svn-src-all@FreeBSD.ORG Tue Mar 24 16:53:18 2015 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 53819425; Tue, 24 Mar 2015 16:53:18 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3DA44384; Tue, 24 Mar 2015 16:53:18 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t2OGrHqV071404; Tue, 24 Mar 2015 16:53:17 GMT (envelope-from ken@FreeBSD.org) Received: (from ken@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t2OGrHvi071403; Tue, 24 Mar 2015 16:53:17 GMT (envelope-from ken@FreeBSD.org) Message-Id: <201503241653.t2OGrHvi071403@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: ken set sender to ken@FreeBSD.org using -f From: "Kenneth D. Merry" Date: Tue, 24 Mar 2015 16:53:17 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r280446 - stable/10/sys/cam X-SVN-Group: stable-10 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Mar 2015 16:53:18 -0000 Author: ken Date: Tue Mar 24 16:53:16 2015 New Revision: 280446 URL: https://svnweb.freebsd.org/changeset/base/280446 Log: MFC, r279375 ------------------------------------------------------------------------ r279375 | ken | 2015-02-27 14:35:36 -0700 (Fri, 27 Feb 2015) | 26 lines Fix I/O size calculation for pass(4) driver requests and add latency tracking. It is important to subtract the residual from the requested transfer size to see how much data was actually transferred. With tape drives in particular, it is common to request more data than is returned. Also, add I/O latency tracking for CAM requests issued by cam_periph_runccb(). If the caller supplies a struct devstat, and the I/O is a SCSI or ATA I/O, we will track the elapsed time to provide I/O latency statistics for the request. sys/cam/scsi/cam_periph.c: In cam_periph_runccb(), subtract the residual when reporting I/O totals to devstat(9) for SCSI and ATA passthrough requests. In cam_periph_runccb(), grab the I/O start time and supply the start time to devstat_end_transaction() so that it can calculate the elapsed I/O time. Sponsored by: Spectra Logic MFC after: 1 week ------------------------------------------------------------------------ Sponsored by: Spectra Logic Modified: stable/10/sys/cam/cam_periph.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cam/cam_periph.c ============================================================================== --- stable/10/sys/cam/cam_periph.c Tue Mar 24 16:46:40 2015 (r280445) +++ stable/10/sys/cam/cam_periph.c Tue Mar 24 16:53:16 2015 (r280446) @@ -1048,8 +1048,11 @@ cam_periph_runccb(union ccb *ccb, cam_flags camflags, u_int32_t sense_flags, struct devstat *ds) { + struct bintime *starttime; + struct bintime ltime; int error; + starttime = NULL; xpt_path_assert(ccb->ccb_h.path, MA_OWNED); /* @@ -1057,8 +1060,11 @@ cam_periph_runccb(union ccb *ccb, * this particular type of ccb, record the transaction start. */ if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO || - ccb->ccb_h.func_code == XPT_ATA_IO)) - devstat_start_transaction(ds, NULL); + ccb->ccb_h.func_code == XPT_ATA_IO)) { + starttime = <ime; + binuptime(starttime); + devstat_start_transaction(ds, starttime); + } ccb->ccb_h.cbfcnp = cam_periph_done; xpt_action(ccb); @@ -1086,22 +1092,22 @@ cam_periph_runccb(union ccb *ccb, if (ds != NULL) { if (ccb->ccb_h.func_code == XPT_SCSI_IO) { devstat_end_transaction(ds, - ccb->csio.dxfer_len, + ccb->csio.dxfer_len - ccb->csio.resid, ccb->csio.tag_action & 0x3, ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) ? DEVSTAT_NO_DATA : (ccb->ccb_h.flags & CAM_DIR_OUT) ? DEVSTAT_WRITE : - DEVSTAT_READ, NULL, NULL); + DEVSTAT_READ, NULL, starttime); } else if (ccb->ccb_h.func_code == XPT_ATA_IO) { devstat_end_transaction(ds, - ccb->ataio.dxfer_len, + ccb->ataio.dxfer_len - ccb->ataio.resid, ccb->ataio.tag_action & 0x3, ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE) ? DEVSTAT_NO_DATA : (ccb->ccb_h.flags & CAM_DIR_OUT) ? DEVSTAT_WRITE : - DEVSTAT_READ, NULL, NULL); + DEVSTAT_READ, NULL, starttime); } }