Date: Thu, 1 Oct 2020 19:57:11 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Hans Petter Selasky <hps@selasky.org> Cc: Michal =?utf-8?B?VmFuxI1v?= <michal@microwave.sk>, freebsd-net@freebsd.org Subject: Re: mlx5 irq Message-ID: <20201001165708.GE2033@zxy.spb.ru> In-Reply-To: <94978a05-94c6-cc55-229c-5a3c5352b29a@selasky.org> References: <0aa09fcc-dfcc-005e-8834-2a758ba6a03f@microwave.sk> <94978a05-94c6-cc55-229c-5a3c5352b29a@selasky.org>
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On Thu, Oct 01, 2020 at 10:10:42AM +0200, Hans Petter Selasky wrote: > On 2020-10-01 09:39, Michal Vančo via freebsd-net wrote: > > Hi > > Hi Michal, > > > I have a server with one Mellanox ConnectX-4 adapter and the following > > CPU configuration (SMT disabled): > > > > # dmesg | grep SMP > > FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs > > FreeBSD/SMP: 2 package(s) x 8 core(s) x 2 hardware threads > > FreeBSD/SMP Online: 2 package(s) x 8 core(s) > > > > What I don't understand is the number of IRQs allocated for each mlx5_core: > > > > # vmstat -i | grep mlx5_core > > irq320: mlx5_core0 1 0 > > irq321: mlx5_core0 18646775 84 > > irq322: mlx5_core0 21 0 > > irq323: mlx5_core0 97793 0 > > irq324: mlx5_core0 84685 0 > > irq325: mlx5_core0 89288 0 > > irq326: mlx5_core0 93564 0 > > irq327: mlx5_core0 86892 0 > > irq328: mlx5_core0 99141 0 > > irq329: mlx5_core0 86695 0 > > irq330: mlx5_core0 104023 0 > > irq331: mlx5_core0 85238 0 > > irq332: mlx5_core0 88387 0 > > irq333: mlx5_core0 93310221 420 > > ^^^ it appears you have some application which is using a single TCP > connection heavily. Then the traffic doesn't get distributed. Do you planed to use more describe irq's name?
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