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From: Richard Cochran <richardcochran@gmail.com>
To: "Zulkifli, Muhammad Husaini" <muhammad.husaini.zulkifli@intel.com>
Cc: "leon@kernel.org" <leon@kernel.org>,
	"intel-wired-lan@osuosl.org" <intel-wired-lan@osuosl.org>,
	"gal@nvidia.com" <gal@nvidia.com>,
	"saeed@kernel.org" <saeed@kernel.org>,
	"edumazet@google.com" <edumazet@google.com>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"kuba@kernel.org" <kuba@kernel.org>,
	"michael.chan@broadcom.com" <michael.chan@broadcom.com>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"andy@greyhouse.net" <andy@greyhouse.net>
Subject: Re: [Intel-wired-lan] [PATCH v2 0/5] Add support for DMA timestamp for non-PTP packets
Date: Tue, 18 Oct 2022 19:37:11 -0700	[thread overview]
Message-ID: <Y09i12Wcqr0whToP@hoboy.vegasvil.org> (raw)
In-Reply-To: <SJ1PR11MB618053D058C8171AAC4D3FADB8289@SJ1PR11MB6180.namprd11.prod.outlook.com>

On Tue, Oct 18, 2022 at 02:12:37PM +0000, Zulkifli, Muhammad Husaini wrote:
> > What is the use case for reporting DMA transmit time?

So the use case (mentioned below) is TSN?

> > How is this better than using SOF_TIMESTAMPING_TX_SOFTWARE ?
> 
> The ideal situation is to use SOF TIMESTAMPING TX SOFTWARE. 
> Application side will undoubtedly want to utilize PHY timestamps as much as possible. 

I'm asking about SOFTWARE not hardware time stamps.
 
> But if every application requested the HW Tx timestamp, especially during periods of high load like TSN, 
> in some cases when the controller only supports 1 HW timestamp, it would be a disaster.

But can't you offer 1 HW time stamp with many SW time stamps?

Thanks,
Rihcard

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  reply	other threads:[~2022-10-19  2:37 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-18  1:07 [Intel-wired-lan] [PATCH v2 0/5] Add support for DMA timestamp for non-PTP packets Muhammad Husaini Zulkifli
2022-10-18  1:07 ` [Intel-wired-lan] [PATCH v2 1/5] ethtool: Add new hwtstamp flag Muhammad Husaini Zulkifli
2022-10-18  1:07 ` [Intel-wired-lan] [PATCH v2 2/5] net-timestamp: Increase the size of tsflags Muhammad Husaini Zulkifli
2022-10-18  5:57   ` Paul Menzel
2022-10-18 12:42     ` Zulkifli, Muhammad Husaini
2022-10-18  1:07 ` [Intel-wired-lan] [PATCH v2 3/5] net: sock: extend SO_TIMESTAMPING for DMA Fetch Muhammad Husaini Zulkifli
2022-10-18  1:07 ` [Intel-wired-lan] [PATCH v2 4/5] igc: Add support for DMA timestamp for non-PTP packets Muhammad Husaini Zulkifli
2022-10-20 22:39   ` Jacob Keller
2022-10-18  1:07 ` [Intel-wired-lan] [PATCH v2 5/5] ethtool: Add support for HWTSTAMP_FILTER_DMA_TIMESTAMP Muhammad Husaini Zulkifli
2022-10-18 11:45 ` [Intel-wired-lan] [PATCH v2 0/5] Add support for DMA timestamp for non-PTP packets Richard Cochran
2022-10-18 14:12   ` Zulkifli, Muhammad Husaini
2022-10-19  2:37     ` Richard Cochran [this message]
2022-10-21  0:25       ` Zulkifli, Muhammad Husaini
2022-10-21 12:48         ` Richard Cochran
2022-10-21 15:16           ` Jakub Kicinski
2022-10-18 14:23 ` Gal Pressman
2022-10-19 14:23   ` Zulkifli, Muhammad Husaini
2022-10-23  7:15     ` Gal Pressman
2022-10-18 19:02 ` Jakub Kicinski
2022-10-20  2:16   ` Zulkifli, Muhammad Husaini
2022-10-20  2:47     ` Jakub Kicinski

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