From: David Miller <davem@davemloft.net>
To: brouer@redhat.com
Cc: netdev@vger.kernel.org, greearb@candelatech.com, robert@herjulf.se
Subject: Re: [net-next PATCH] pktgen: add flag NO_TIMESTAMP to disable timestamping
Date: Mon, 01 Sep 2014 18:07:18 -0700 (PDT) [thread overview]
Message-ID: <20140901.180718.1517902146681973349.davem@davemloft.net> (raw)
In-Reply-To: <20140828161447.6652.59388.stgit@dragon>
From: Jesper Dangaard Brouer <brouer@redhat.com>
Date: Thu, 28 Aug 2014 18:14:47 +0200
> Then testing the TX limits of the stack, then it is useful to
> be-able to disable the do_gettimeofday() timetamping on every packet.
>
> This implements a pktgen flag NO_TIMESTAMP which will disable this
> call to do_gettimeofday().
>
> The performance change on (my system E5-2695) with skb_clone=0, goes
> from TX 2,423,751 pps to 2,567,165 pps with flag NO_TIMESTAMP. Thus,
> the cost of do_gettimeofday() or saving is approx 23 nanosec.
>
> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
This is fine, applied, thanks!
next prev parent reply other threads:[~2014-09-02 1:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-28 16:14 [net-next PATCH] pktgen: add flag NO_TIMESTAMP to disable timestamping Jesper Dangaard Brouer
2014-08-29 16:17 ` Eric Dumazet
2014-08-29 19:02 ` Jesper Dangaard Brouer
2014-09-02 1:07 ` David Miller [this message]
2015-04-01 16:48 ` Ben Greear
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