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From: Hadar Hen Zion <hadarh@mellanox.com>
To: Richard Cochran <richardcochran@gmail.com>
Cc: Shawn Bohrer <shawn.bohrer@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Or Gerlitz <ogerlitz@mellanox.com>,
	Amir Vadai <amirv@mellanox.com>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"tomk@rgmadvisors.com" <tomk@rgmadvisors.com>,
	Shawn Bohrer <sbohrer@rgmadvisors.com>
Subject: Re: [PATCH net-next 1/2] mlx4_en: Add PTP hardware clock
Date: Thu, 26 Dec 2013 10:26:52 +0200	[thread overview]
Message-ID: <52BBE84C.1030702@mellanox.com> (raw)
In-Reply-To: <20131225115322.GB5378@netboy>

On 12/25/2013 1:53 PM, Richard Cochran wrote:
> On Tue, Dec 24, 2013 at 03:58:06PM +0200, Hadar Hen Zion wrote:
>>
>> The spin locks case such a bottleneck since I'm using multiple
>> streams in my performance test. RSS mechanism scattered the streams
>> between multiple RX rings while each RX ring is bound to a different
>> cup.
>> The describe scenario cause lock contention between the different RX rings.
>>
>> Performance drops from 37.8 Gbits/sec to 32.1 Gbits/sec when spin
>> locks are added and goes back to 37.8 Gbits/sec when using
>> read/write locks.
>
> And you are time stamping every received packet?
>
> Thanks,
> Richard
>

Yes, current implementation time stamping every received packet.
I do think time stamping only packets from the relevant socket will make 
more sense but SIOCSHWTSTAMP ioctl provides only the device without any 
socket attributes.

Thanks,
Hadar

  parent reply	other threads:[~2013-12-26  8:27 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-17 20:32 [PATCH net-next 0/2] mlx4_en: Add PTP support Shawn Bohrer
2013-12-17 20:32 ` [PATCH net-next 1/2] mlx4_en: Add PTP hardware clock Shawn Bohrer
2013-12-17 21:04   ` Or Gerlitz
2013-12-17 21:46     ` Shawn Bohrer
2013-12-18  7:59       ` Or Gerlitz
2013-12-18 15:03         ` Shawn Bohrer
2013-12-22 13:13   ` Hadar Hen Zion
2013-12-23 16:29     ` Shawn Bohrer
2013-12-23 16:59       ` Shawn Bohrer
2013-12-24 15:38         ` Hadar Hen Zion
2013-12-25 11:49           ` Richard Cochran
2013-12-23 18:48     ` Richard Cochran
2013-12-24 13:58       ` Hadar Hen Zion
2013-12-25 11:53         ` Richard Cochran
     [not found]           ` <CAKBbMu33zXkG4+S1kP6zB+4iKMNNoy=XVBtoqZZEkqurRsgvQw@mail.gmail.com>
2013-12-25 17:02             ` Richard Cochran
2013-12-26  8:26           ` Hadar Hen Zion [this message]
2013-12-26  8:33             ` Hadar Hen Zion
2013-12-26  9:17               ` Richard Cochran
2013-12-26 14:41                 ` Hadar Hen-Zion
2013-12-26 14:49                   ` Richard Cochran
2013-12-17 20:32 ` [PATCH net-next 2/2] mlx4_en: Only cycle port if HW timestamp config changes Shawn Bohrer

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