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From: David Miller <davem@davemloft.net>
To: sowmini.varadhan@oracle.com
Cc: raghuram.kothakota@oracle.com, netdev@vger.kernel.org
Subject: Re: [PATCH net-next 2/2] sunvnet: Re-check for a VIO_DESC_READY data descriptor after short udelay()
Date: Tue, 02 Sep 2014 13:59:02 -0700 (PDT)	[thread overview]
Message-ID: <20140902.135902.167580446823265395.davem@davemloft.net> (raw)
In-Reply-To: <54059BAA.1080307@oracle.com>

From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Date: Tue, 02 Sep 2014 06:27:54 -0400

> when there are no more packets coming, the extra 12 microsecond
> delay is not that big of a deal anyway.

How much other work could the cpu do in those 12 microseconds?

That's almost 3000 cpu cycles on a T4.

I understand your argument, and the fact that there are some existing
pieces of code doing this already, so I'll think about it some more.

Thanks.

  parent reply	other threads:[~2014-09-02 20:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-29 20:18 [PATCH net-next 2/2] sunvnet: Re-check for a VIO_DESC_READY data descriptor after short udelay() Sowmini Varadhan
2014-09-02  3:47 ` David Miller
2014-09-02 10:27   ` Sowmini Varadhan
2014-09-02 16:43     ` Raghuram Kothakota
2014-09-02 16:56       ` Sowmini Varadhan
2014-09-02 17:33         ` Raghuram Kothakota
2014-09-02 20:59     ` David Miller [this message]
2014-09-03 17:12       ` Sowmini Varadhan

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