From: Tony Lindgren <tony@atomide.com>
To: Russell King - ARM Linux <linux@armlinux.org.uk>
Cc: netdev@vger.kernel.org, linux-omap@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Grygorii Strashko <grygorii.strashko@ti.com>
Subject: Re: OMAP4430 SDP with KS8851: very slow networking
Date: Fri, 7 Dec 2018 12:55:33 -0800 [thread overview]
Message-ID: <20181207205533.GU6707@atomide.com> (raw)
In-Reply-To: <20181207192731.GB9507@n2100.armlinux.org.uk>
* Russell King - ARM Linux <linux@armlinux.org.uk> [181207 19:27]:
> You mentioned that edge mode didn't work as well as level mode on
> duovero smsc controller, I think this may help to solve the same
> issue but for edge IRQs - we need a mask_ack_irq function to avoid
> acking while the edge interrupt is masked. Let me know if that
> lowers the smsc ping latency while in edge mode.
Looks like smsc edge interrupt is still producing varying
ping latencies with this. Seems like the mas_ack_irq is
a nice improvment though.
Regards,
Tony
WARNING: multiple messages have this Message-ID (diff)
From: Tony Lindgren <tony@atomide.com>
To: Russell King - ARM Linux <linux@armlinux.org.uk>
Cc: netdev@vger.kernel.org,
Grygorii Strashko <grygorii.strashko@ti.com>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: OMAP4430 SDP with KS8851: very slow networking
Date: Fri, 7 Dec 2018 12:55:33 -0800 [thread overview]
Message-ID: <20181207205533.GU6707@atomide.com> (raw)
In-Reply-To: <20181207192731.GB9507@n2100.armlinux.org.uk>
* Russell King - ARM Linux <linux@armlinux.org.uk> [181207 19:27]:
> You mentioned that edge mode didn't work as well as level mode on
> duovero smsc controller, I think this may help to solve the same
> issue but for edge IRQs - we need a mask_ack_irq function to avoid
> acking while the edge interrupt is masked. Let me know if that
> lowers the smsc ping latency while in edge mode.
Looks like smsc edge interrupt is still producing varying
ping latencies with this. Seems like the mas_ack_irq is
a nice improvment though.
Regards,
Tony
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next prev parent reply other threads:[~2018-12-07 20:55 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-06 13:22 OMAP4430 SDP with KS8851: very slow networking Russell King - ARM Linux
2018-12-06 13:22 ` Russell King - ARM Linux
2018-12-06 16:31 ` Tony Lindgren
2018-12-06 16:31 ` Tony Lindgren
2018-12-06 18:08 ` Russell King - ARM Linux
2018-12-06 18:08 ` Russell King - ARM Linux
2018-12-06 22:14 ` Tony Lindgren
2018-12-06 22:14 ` Tony Lindgren
2018-12-07 18:00 ` Russell King - ARM Linux
2018-12-07 18:00 ` Russell King - ARM Linux
2018-12-07 18:14 ` Tony Lindgren
2018-12-07 18:14 ` Tony Lindgren
2018-12-07 19:03 ` Tony Lindgren
2018-12-07 19:03 ` Tony Lindgren
2018-12-07 19:27 ` Russell King - ARM Linux
2018-12-07 19:27 ` Russell King - ARM Linux
2018-12-07 20:55 ` Tony Lindgren [this message]
2018-12-07 20:55 ` Tony Lindgren
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