netdev - Re: [PATCH v4 net-next 3/3] net: ena: Add PHC documentation

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Message-ID: <Zz6973UqdRO1uV8L@hoboy.vegasvil.org>
Date: Wed, 20 Nov 2024 20:58:23 -0800
From: Richard Cochran <richardcochran@...il.com>
To: "Arinzon, David" <darinzon@...zon.com>
Cc: David Miller <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	"Woodhouse, David" <dwmw@...zon.co.uk>,
	"Machulsky, Zorik" <zorik@...zon.com>,
	"Matushevsky, Alexander" <matua@...zon.com>,
	"Bshara, Saeed" <saeedb@...zon.com>,
	"Wilson, Matt" <msw@...zon.com>,
	"Liguori, Anthony" <aliguori@...zon.com>,
	"Bshara, Nafea" <nafea@...zon.com>,
	"Schmeilin, Evgeny" <evgenys@...zon.com>,
	"Belgazal, Netanel" <netanel@...zon.com>,
	"Saidi, Ali" <alisaidi@...zon.com>,
	"Herrenschmidt, Benjamin" <benh@...zon.com>,
	"Kiyanovski, Arthur" <akiyano@...zon.com>,
	"Dagan, Noam" <ndagan@...zon.com>,
	"Bernstein, Amit" <amitbern@...zon.com>,
	"Agroskin, Shay" <shayagr@...zon.com>,
	"Abboud, Osama" <osamaabb@...zon.com>,
	"Ostrovsky, Evgeny" <evostrov@...zon.com>,
	"Tabachnik, Ofir" <ofirt@...zon.com>,
	"Machnikowski, Maciek" <maciek@...hnikowski.net>,
	Rahul Rameshbabu <rrameshbabu@...dia.com>,
	Gal Pressman <gal@...dia.com>
Subject: Re: [PATCH v4 net-next 3/3] net: ena: Add PHC documentation

On Tue, Nov 19, 2024 at 08:45:52AM +0000, Arinzon, David wrote:
> Our device limits the number of requests per client (VM) through throttling.

So it sounds like this device provides time to VM guests?

If so, you might consider generating an interrupt to provide a
"virtual" PPS as some of the other VM solutions do.  That way, you
avoid all of those unwanted gettime() calls.

HTH,
Richard