Date: Thu, 28 Apr 2016 12:02:58 -0700 From: bazzoola <bazzoola@gmail.com> To: Navdeep Parhar <np@FreeBSD.org>, freebsd-net@freebsd.org Subject: Re: netmap overrun counters Message-ID: <863506de-870e-0da4-81d3-6ab537feaa2b@gmail.com> In-Reply-To: <9fd88731-2cdf-a6da-4b4e-f97bb120696a@FreeBSD.org> References: <cd306a81-3a4b-6386-a059-73d455d3c931@gmail.com> <9fd88731-2cdf-a6da-4b4e-f97bb120696a@FreeBSD.org>
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On 04/28/2016 11:35 AM, Navdeep Parhar wrote: > On 04/28/2016 11:13, bazzoola wrote: >> Hi! >> >> Two questions: >> >> (1) Is there a way to know when netmap rx rings overrun? Most NIC >> drivers provide MPC (missed packet count) and sysctl for rx_overrun. >> >> I would like to know if my application is not reading as fast, i.e., no >> frames are being dropped. > > A NIC's hardware counters don't distinguish between netmap or normal > operation so you can monitor the existing sysctls for rx drops/overruns. > > Regards, > Navdeep > Navdeep, I am not asking about NIC's ring overrun. As you know netmap has its own rings. Is there a way to know if netmap's rx ring overrun? Thanks for your input.
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