Date: Mon, 20 Jul 2020 13:43:39 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: net@freebsd.org Subject: Re: mlx5 interrupts Message-ID: <20200720104339.GK44314@kib.kiev.ua> In-Reply-To: <20200719161207.GA2033@zxy.spb.ru> References: <20200719161207.GA2033@zxy.spb.ru>
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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. > > # 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
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