From owner-freebsd-net@freebsd.org Mon Jul 20 11:31:58 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id E61A935ACD3 for ; Mon, 20 Jul 2020 11:31:58 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4B9KM25GS0z3bQW for ; Mon, 20 Jul 2020 11:31:58 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: by mailman.nyi.freebsd.org (Postfix) id B2C7835ACD2; Mon, 20 Jul 2020 11:31:58 +0000 (UTC) Delivered-To: net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B171835AAF0 for ; Mon, 20 Jul 2020 11:31:58 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4B9KM141Tyz3b7G for ; Mon, 20 Jul 2020 11:31:57 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id 06KBVm9F053255 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Mon, 20 Jul 2020 14:31:52 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua 06KBVm9F053255 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id 06KBVmLK053254; Mon, 20 Jul 2020 14:31:48 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Mon, 20 Jul 2020 14:31:48 +0300 From: Konstantin Belousov To: Slawa Olhovchenkov Cc: net@freebsd.org Subject: Re: mlx5 interrupts Message-ID: <20200720113148.GL44314@kib.kiev.ua> References: <20200719161207.GA2033@zxy.spb.ru> <20200720104339.GK44314@kib.kiev.ua> <20200720110426.GI2015@zxy.spb.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200720110426.GI2015@zxy.spb.ru> X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FROM, NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on tom.home X-Rspamd-Queue-Id: 4B9KM141Tyz3b7G X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=gmail.com (policy=none); spf=softfail (mx1.freebsd.org: 2001:470:d5e7:1::1 is neither permitted nor denied by domain of kostikbel@gmail.com) smtp.mailfrom=kostikbel@gmail.com X-Spamd-Result: default: False [0.62 / 15.00]; RCVD_TLS_ALL(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.14)[-0.138]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; NEURAL_SPAM_SHORT(0.23)[0.235]; MIME_GOOD(-0.10)[text/plain]; HAS_XAW(0.00)[]; R_SPF_SOFTFAIL(0.00)[~all]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_SPAM_LONG(0.52)[0.519]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; FREEMAIL_ENVFROM(0.00)[gmail.com]; DMARC_POLICY_SOFTFAIL(0.10)[gmail.com : No valid SPF, No valid DKIM,none] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Jul 2020 11:31:59 -0000 On Mon, Jul 20, 2020 at 02:04:26PM +0300, Slawa Olhovchenkov wrote: > On Mon, Jul 20, 2020 at 01:43:39PM +0300, Konstantin Belousov wrote: > > > On Sun, Jul 19, 2020 at 07:12:07PM +0300, Slawa Olhovchenkov wrote: > > > Can anybody explain what purpose of unnamed interrupts of Mellanox > > > ConnectX-5 cards? > > > > > > I am see 19 interrupts per card. I am mean last 16 is RX queue. > > It is more correct to describe them as completion queue interrupts, they > > serve both rx and tx workqueues. > > > > > What about first 3? > > One is for firmware memory requests notifications for UMA. > > Two others are firmware command completion and async events (like PHY > > module events or hw state notifications). > > > > > Also I am see very high rate for irq287/irq306 -- is this good? > > You did not demostrated what you mean by 'very high rate'. > > 20 req/sec does not count as 'high', and this is the highest I see > > in your message. > > Currently this is idle server and totaly interrupts count for firmware > command completion is 50x more compared to completion queue > interrupts. I am afraid to flooded at prodation load. Did you reflashed firmware to the latest supported release ? If not, do that. Why are you sure that this is command completion and not events ? Set sysctl dev.mce.0.conf.debug_stats=1 then look at the output of sysctl dev.mce.0.hw_ctx_debug. > > Also, completion queue interrupts may be pined to dedicaded CPU, what > about command completion? Command completion is normal MSI-X interrupt, but I think that the official recommendation is to not fiddle with it. Commands are not used for normal tx/rx path, they only provide management and statistics. > > > > > > > # vmstat -i | grep -e ^int -e mlx > > > interrupt total rate > > > irq286: mlx5_core0 1 0 > > > irq287: mlx5_core0 5135992 20 > > > irq288: mlx5_core0 1 0 > > > irq289: mlx5_core0 76408 0 > > > irq290: mlx5_core0 43054 0 > > > irq291: mlx5_core0 93826 0 > > > irq292: mlx5_core0 39457 0 > > > irq293: mlx5_core0 36141 0 > > > irq294: mlx5_core0 65526 0 > > > irq295: mlx5_core0 53399 0 > > > irq296: mlx5_core0 120885 0 > > > irq297: mlx5_core0 140690 1 > > > irq298: mlx5_core0 193578 1 > > > irq299: mlx5_core0 178332 1 > > > irq300: mlx5_core0 75334 0 > > > irq301: mlx5_core0 207118 1 > > > irq302: mlx5_core0 108803 0 > > > irq303: mlx5_core0 24356 0 > > > irq304: mlx5_core0 26713 0 > > > irq305: mlx5_core1 1 0 > > > irq306: mlx5_core1 5136296 20 > > > irq307: mlx5_core1 1 0 > > > irq308: mlx5_core1 3634544 14 > > > irq309: mlx5_core1 22860 0 > > > irq310: mlx5_core1 564441 2 > > > irq311: mlx5_core1 30503 0 > > > irq312: mlx5_core1 115549 0 > > > irq313: mlx5_core1 49815 0 > > > irq314: mlx5_core1 10272 0 > > > irq315: mlx5_core1 85875 0 > > > irq316: mlx5_core1 134251 1 > > > irq317: mlx5_core1 25151 0 > > > irq318: mlx5_core1 73376 0 > > > irq319: mlx5_core1 5879 0 > > > irq320: mlx5_core1 39515 0 > > > irq321: mlx5_core1 5390 0 > > > irq322: mlx5_core1 22726 0 > > > irq323: mlx5_core1 60408 0