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Date:      Fri, 1 May 2015 10:32:00 -0700
From:      Navdeep Parhar <nparhar@gmail.com>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        Gleb Smirnoff <glebius@FreeBSD.org>, John Baldwin <jhb@freebsd.org>, svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org
Subject:   Re: svn commit: r282280 - in head/sys/dev: e1000 ixgbe ixl
Message-ID:  <20150501173200.GA2869@nparhar-pc>
In-Reply-To: <20150501163108.GZ1394@zxy.spb.ru>
References:  <201504301823.t3UINd74073186@svn.freebsd.org> <20150430232736.GB546@FreeBSD.org> <1998053.shmPH6saZj@ralph.baldwin.cx> <20150501135134.GC546@FreeBSD.org> <20150501163108.GZ1394@zxy.spb.ru>

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On Fri, May 01, 2015 at 07:31:08PM +0300, Slawa Olhovchenkov wrote:
> On Fri, May 01, 2015 at 04:51:34PM +0300, Gleb Smirnoff wrote:
...
> > 
> > However, if we don't expect the number of queues to exceed a reasonable
> > number of 255 :), we can fit the functionality into existing API.
> > We can keep the queue number in the highest 8 bits of the ift_counter
> > parameter.
> 
> In case of hardware-assist NIC emulation numbers may be rise: x710
> have 1536 queue per port.

I agree that 255 is pretty low.  cxgbe(4) hardware also supports more
queues than this already (it supports 1K rx queues and 64K tx queues).

Regards,
Navdeep


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