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 10:33:26 +0200 [thread overview]
Message-ID: <52BBE9D6.3040006@mellanox.com> (raw)
In-Reply-To: <52BBE84C.1030702@mellanox.com>
On 12/26/2013 10:26 AM, Hadar Hen Zion wrote:
> 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
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger•kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
Is there a way to time stamping packets per socket?
Thanks,
Hadar
next prev parent reply other threads:[~2013-12-26 8:34 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
2013-12-26 8:33 ` Hadar Hen Zion [this message]
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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