From: Rick Jones <rick.jones2@hp.com>
To: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Cc: Ben Greear <greearb@candelatech.com>, NetDev <netdev@vger.kernel.org>
Subject: Re: Getting physical packet counts with LRO enabled with ixgbe?
Date: Wed, 23 Sep 2009 12:03:01 -0700 [thread overview]
Message-ID: <4ABA70E5.9070404@hp.com> (raw)
In-Reply-To: <1253731834.2538.32.camel@localhost.localdomain>
>>Next time you guys re-compile your hardware, please consider adding byte counters :)
>
>
> On 10G adapters, byte counters can skyrocket quickly, so we'd need to
> read them often to avoid them wrapping.
10G Ethernet is ~1.16 GB/s (GiB/s for purists I guess) for simplicity, call that
2GB/s or 2^31 bytes per second. If the counter is 64 bits, that would suggest
wrap in 2^64/2^31 or 2^33 seconds right? Or have I made some nasty math error?
I'm having quit a difficult time imagining that someone would have 32 bit
counters in a 10G NIC.
rick jones
next prev parent reply other threads:[~2009-09-23 19:02 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-23 16:40 Getting physical packet counts with LRO enabled with ixgbe? Ben Greear
2009-09-23 18:32 ` Peter P Waskiewicz Jr
2009-09-23 18:46 ` Ben Greear
2009-09-23 18:50 ` Peter P Waskiewicz Jr
2009-09-23 18:56 ` Ben Greear
2009-09-23 19:03 ` Rick Jones [this message]
2009-09-25 21:45 ` Herbert Xu
2009-09-25 21:50 ` Ben Greear
2009-09-25 21:59 ` David Miller
2009-09-25 22:01 ` Herbert Xu
2009-09-25 22:12 ` Ben Greear
2009-09-25 22:40 ` Peter P Waskiewicz Jr
2009-09-25 22:09 ` Herbert Xu
2009-09-25 21:56 ` Peter P Waskiewicz Jr
2009-09-25 22:10 ` Herbert Xu
2009-09-23 21:37 ` Ben Greear
2009-09-23 21:56 ` Ben Greear
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