From owner-svn-src-stable-12@freebsd.org Mon Mar 11 13:55:49 2019 Return-Path: Delivered-To: svn-src-stable-12@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D809D1543E7C; Mon, 11 Mar 2019 13:55:48 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 7E5B99700A; Mon, 11 Mar 2019 13:55:48 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 6FB95BA7A; Mon, 11 Mar 2019 13:55:48 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x2BDtmWK088018; Mon, 11 Mar 2019 13:55:48 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x2BDtl7x088015; Mon, 11 Mar 2019 13:55:47 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201903111355.x2BDtl7x088015@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Mon, 11 Mar 2019 13:55:47 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r345006 - stable/12/sys/cam/ctl X-SVN-Group: stable-12 X-SVN-Commit-Author: mav X-SVN-Commit-Paths: stable/12/sys/cam/ctl X-SVN-Commit-Revision: 345006 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 7E5B99700A X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.99)[-0.995,0]; NEURAL_HAM_SHORT(-0.96)[-0.958,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Mar 2019 13:55:49 -0000 Author: mav Date: Mon Mar 11 13:55:47 2019 New Revision: 345006 URL: https://svnweb.freebsd.org/changeset/base/345006 Log: MFC r344743: Reduce CTL threads priority to about PUSER. Since in most configurations CTL serves as network service, we found that this change improves local system interactivity under heavy load. Priority of main threads is set slightly higher then worker taskqueues to make them quickly sort incoming requests not creating bottlenecks, while plenty of worker taskqueues should be less sensitive to latency. Modified: stable/12/sys/cam/ctl/ctl.c stable/12/sys/cam/ctl/ctl_backend_block.c stable/12/sys/cam/ctl/ctl_backend_ramdisk.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/cam/ctl/ctl.c ============================================================================== --- stable/12/sys/cam/ctl/ctl.c Mon Mar 11 13:33:03 2019 (r345005) +++ stable/12/sys/cam/ctl/ctl.c Mon Mar 11 13:55:47 2019 (r345006) @@ -66,6 +66,8 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include +#include #include #include #include @@ -13296,6 +13298,9 @@ ctl_work_thread(void *arg) int retval; CTL_DEBUG_PRINT(("ctl_work_thread starting\n")); + thread_lock(curthread); + sched_prio(curthread, PUSER - 1); + thread_unlock(curthread); while (!softc->shutdown) { /* @@ -13345,7 +13350,7 @@ ctl_work_thread(void *arg) } /* Sleep until we have something to do. */ - mtx_sleep(thr, &thr->queue_lock, PDROP | PRIBIO, "-", 0); + mtx_sleep(thr, &thr->queue_lock, PDROP, "-", 0); } thr->thread = NULL; kthread_exit(); @@ -13358,6 +13363,9 @@ ctl_lun_thread(void *arg) struct ctl_be_lun *be_lun; CTL_DEBUG_PRINT(("ctl_lun_thread starting\n")); + thread_lock(curthread); + sched_prio(curthread, PUSER - 1); + thread_unlock(curthread); while (!softc->shutdown) { mtx_lock(&softc->ctl_lock); @@ -13371,7 +13379,7 @@ ctl_lun_thread(void *arg) /* Sleep until we have something to do. */ mtx_sleep(&softc->pending_lun_queue, &softc->ctl_lock, - PDROP | PRIBIO, "-", 0); + PDROP, "-", 0); } softc->lun_thread = NULL; kthread_exit(); @@ -13389,6 +13397,9 @@ ctl_thresh_thread(void *arg) int i, e, set; CTL_DEBUG_PRINT(("ctl_thresh_thread starting\n")); + thread_lock(curthread); + sched_prio(curthread, PUSER - 1); + thread_unlock(curthread); while (!softc->shutdown) { mtx_lock(&softc->ctl_lock); @@ -13476,7 +13487,7 @@ ctl_thresh_thread(void *arg) } } mtx_sleep(&softc->thresh_thread, &softc->ctl_lock, - PDROP | PRIBIO, "-", CTL_LBP_PERIOD * hz); + PDROP, "-", CTL_LBP_PERIOD * hz); } softc->thresh_thread = NULL; kthread_exit(); Modified: stable/12/sys/cam/ctl/ctl_backend_block.c ============================================================================== --- stable/12/sys/cam/ctl/ctl_backend_block.c Mon Mar 11 13:33:03 2019 (r345005) +++ stable/12/sys/cam/ctl/ctl_backend_block.c Mon Mar 11 13:55:47 2019 (r345006) @@ -2381,7 +2381,7 @@ ctl_be_block_create(struct ctl_be_block_softc *softc, */ retval = taskqueue_start_threads(&be_lun->io_taskqueue, /*num threads*/num_threads, - /*priority*/PWAIT, + /*priority*/PUSER, /*thread name*/ "%s taskq", be_lun->lunname); Modified: stable/12/sys/cam/ctl/ctl_backend_ramdisk.c ============================================================================== --- stable/12/sys/cam/ctl/ctl_backend_ramdisk.c Mon Mar 11 13:33:03 2019 (r345005) +++ stable/12/sys/cam/ctl/ctl_backend_ramdisk.c Mon Mar 11 13:55:47 2019 (r345006) @@ -1149,7 +1149,7 @@ ctl_backend_ramdisk_create(struct ctl_be_ramdisk_softc retval = taskqueue_start_threads(&be_lun->io_taskqueue, /*num threads*/1, - /*priority*/PWAIT, + /*priority*/PUSER, /*thread name*/ "%s taskq", be_lun->lunname); if (retval != 0)