netdev - Re: [PATCH net-next v4 05/12] net: ethernet: oa_tc6: implement error interrupts unmasking

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Date: Mon, 29 Apr 2024 00:04:55 +0200
From: Ramón Nordin Rodriguez <ramon.nordin.rodriguez@...roamp.se>
To: Andrew Lunn <andrew@...n.ch>
Cc: Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, horms@...nel.org, saeedm@...dia.com,
	anthony.l.nguyen@...el.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, corbet@....net,
	linux-doc@...r.kernel.org, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	devicetree@...r.kernel.org, horatiu.vultur@...rochip.com,
	ruanjinjie@...wei.com, steen.hegelund@...rochip.com,
	vladimir.oltean@....com, UNGLinuxDriver@...rochip.com,
	Thorsten.Kummermehr@...rochip.com, Pier.Beruto@...emi.com,
	Selvamani.Rajagopal@...emi.com, Nicolas.Ferre@...rochip.com,
	benjamin.bigler@...nformulastudent.ch
Subject: Re: [PATCH net-next v4 05/12] net: ethernet: oa_tc6: implement error
 interrupts unmasking

On Sun, Apr 28, 2024 at 04:59:40PM +0200, Andrew Lunn wrote:
> > n  |  name     |  min  |  avg  |  max  |  rx dropped  |  samples
> > 1  |  no mod   |  827K |  846K |  891K |      945     |     5
> > 2  |  no log   |  711K |  726K |  744K |      562     |     5
> > 3  |  less irq |  815K |  833K |  846K |      N/A     |     5
> > 4  |  no irq   |  914K |  924K |  931K |      N/A     |     5
> > 5  |  simple   |  857K |  868K |  879K |      615     |     5
> 
> That is odd.
> 
> Side question: What CONFIG_HZ= do you have? 100, 250, 1000?  Try
> 1000. I've seen problems where the driver wants to sleep for a short
> time, but the CONFIG_HZ value limits how short a time it can actually
> sleep. It ends up sleeping much longer than it wants.
> 

Good catch, had it set to 250. I'll rebuild with CONFIG_HZ=1000 and
rerun the tests.