From: Nivedita Singhvi <niv@us.ibm.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: netdev@vger.kernel.org, Eric Dumazet <dada1@cosmosbay.com>
Subject: Re: UDP multicast packet loss not reported if TX ring overrun?
Date: Mon, 17 Aug 2009 13:40:06 -0700 [thread overview]
Message-ID: <4A89C026.4030402@us.ibm.com> (raw)
In-Reply-To: <alpine.DEB.1.10.0908171548040.20399@gentwo.org>
Christoph Lameter wrote:
> If I use a large send queue
>
> (echo 2000000 >/proc/sys/net/core/wmem_default)
>
> then lots of packet loss results if I try to send more packets than
> the bandwidth of the wire (300 bytes the maximum rate is 341k pps). With a
> size of 2M for the output buffer the TX ring is overrun.
>
> But this loss is nowhere seen in any counter increments:
Is there any chance this is getting dropped at qdisc?
Can you check with tc?
thanks,
Nivedita
next prev parent reply other threads:[~2009-08-17 20:40 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-17 20:01 UDP multicast packet loss not reported if TX ring overrun? Christoph Lameter
2009-08-17 20:40 ` Nivedita Singhvi [this message]
2009-08-17 20:46 ` Christoph Lameter
2009-08-17 21:50 ` Sridhar Samudrala
2009-08-17 22:13 ` Christoph Lameter
2009-08-17 22:43 ` Sridhar Samudrala
2009-08-17 22:52 ` Christoph Lameter
2009-08-17 22:57 ` Christoph Lameter
2009-08-18 0:12 ` Sridhar Samudrala
2009-08-18 0:25 ` Christoph Lameter
2009-08-24 17:40 ` Christoph Lameter
2009-08-24 22:02 ` Eric Dumazet
2009-08-24 22:36 ` Sridhar Samudrala
2009-08-25 13:48 ` Christoph Lameter
2009-08-25 19:03 ` David Stevens
2009-08-25 19:08 ` David Miller
2009-08-25 19:15 ` Christoph Lameter
2009-08-25 19:56 ` Joe Perches
2009-08-25 22:35 ` Sridhar Samudrala
2009-08-26 14:08 ` Christoph Lameter
2009-08-26 14:22 ` Eric Dumazet
2009-08-26 15:27 ` Christoph Lameter
2009-08-26 16:29 ` Christoph Lameter
2009-08-26 17:50 ` Sridhar Samudrala
2009-08-26 19:09 ` Christoph Lameter
2009-08-26 22:11 ` Sridhar Samudrala
2009-08-27 15:40 ` Christoph Lameter
2009-08-27 20:23 ` Christoph Lameter
2009-08-28 13:53 ` Christoph Lameter
2009-08-28 15:07 ` Eric Dumazet
2009-08-28 16:15 ` Christoph Lameter
2009-08-28 17:26 ` [PATCH net-next-2.6] ip: Report qdisc packet drops Eric Dumazet
2009-08-29 6:38 ` David Miller
2009-08-31 12:09 ` Eric Dumazet
2009-09-02 1:41 ` David Miller
2009-09-02 14:43 ` Eric Dumazet
2009-09-02 16:11 ` Sridhar Samudrala
2009-09-02 16:20 ` Eric Dumazet
2009-09-02 19:37 ` Christoph Lameter
2009-09-02 16:05 ` Eric Dumazet
2009-09-02 22:26 ` Eric Dumazet
2009-09-03 1:05 ` David Miller
2009-09-03 17:57 ` Christoph Lameter
2009-09-03 14:12 ` Eric Dumazet
2009-09-03 18:35 ` Christoph Lameter
2009-09-02 18:22 ` Christoph Lameter
2009-09-03 1:09 ` David Miller
2009-08-28 19:26 ` UDP multicast packet loss not reported if TX ring overrun? David Miller
2009-08-28 20:00 ` Christoph Lameter
2009-08-28 20:04 ` David Miller
2009-08-28 19:24 ` David Miller
2009-08-28 19:53 ` Christoph Lameter
2009-08-28 20:03 ` David Miller
2009-08-28 20:09 ` Christoph Lameter
2009-08-30 0:21 ` Mark Smith
2009-08-25 13:46 ` Christoph Lameter
2009-08-25 13:48 ` Eric Dumazet
2009-08-25 14:00 ` Christoph Lameter
2009-08-25 15:32 ` Eric Dumazet
2009-08-25 15:35 ` Christoph Lameter
2009-08-25 15:58 ` Eric Dumazet
2009-08-25 16:11 ` Christoph Lameter
2009-08-25 16:27 ` Eric Dumazet
2009-08-25 16:36 ` Christoph Lameter
2009-08-25 16:48 ` Eric Dumazet
2009-08-25 17:01 ` Christoph Lameter
2009-08-25 17:08 ` Eric Dumazet
2009-08-25 17:44 ` Christoph Lameter
2009-08-25 17:53 ` Christoph Lameter
2009-08-25 18:38 ` Sridhar Samudrala
2009-08-24 23:14 ` Eric Dumazet
2009-08-25 6:46 ` Eric Dumazet
2009-08-25 13:45 ` Christoph Lameter
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