From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Guillaume Picquet <guillaume@picquet.fr>, linux-can@vger.kernel.org
Subject: Re: SocketCAN stops read after RX overflow, is it normal?
Date: Mon, 12 Oct 2015 10:54:46 +0200 [thread overview]
Message-ID: <561B7556.3050206@pengutronix.de> (raw)
In-Reply-To: <561B69B2.9010804@picquet.fr>
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On 10/12/2015 10:05 AM, Guillaume Picquet wrote:
> I've received a patched firmware from my provider, tested it and so far
> so good.
Good to hear that. Can you send the patches or at91_can.c to the list?
> I've connected 2 devices (AT91 based) at 1Mb/s.
> So far more than 470000000 frames received so far.
> From the user-space point of view it's much better.
> Now the only way to know if rx overflow occur is to set SO_RXQ_OVFL
> flag, use recvmsg and check ancillary data.
No, that's not correct. With SO_RXQ_OVFL you'll detect overflows of the
socket. When there are overflows in the hardware the rx overrun in per
device statistics will be increased (see ifconfig) output.
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
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next prev parent reply other threads:[~2015-10-12 8:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-02 10:17 SocketCAN stops read after RX overflow, is it normal? Guillaume Picquet
2015-09-03 9:01 ` Marc Kleine-Budde
2015-10-12 8:05 ` Guillaume Picquet
2015-10-12 8:54 ` Marc Kleine-Budde [this message]
2015-10-12 9:04 ` Guillaume Picquet
2015-10-12 9:15 ` Marc Kleine-Budde
2015-10-12 9:46 ` Guillaume Picquet
2015-10-12 9:50 ` Marc Kleine-Budde
2015-09-03 9:16 ` Alexander Stein
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