33 messages in org.freebsd.freebsd-currentRE: dev.bce.X.com_no_buffers increasi...| From | Sent On | Attachments |
|---|---|---|
| Ian FREISLICH | Mar 5, 2010 3:20 am | |
| Pyun YongHyeon | Mar 5, 2010 9:56 am | |
| Ian FREISLICH | Mar 5, 2010 10:16 am | |
| Pyun YongHyeon | Mar 5, 2010 10:40 am | |
| Ian FREISLICH | Mar 5, 2010 12:19 pm | |
| Pyun YongHyeon | Mar 5, 2010 1:04 pm | |
| Ian FREISLICH | Mar 5, 2010 1:16 pm | |
| Pyun YongHyeon | Mar 5, 2010 1:55 pm | |
| Ian FREISLICH | Mar 8, 2010 6:44 am | |
| Pyun YongHyeon | Mar 8, 2010 9:49 am | |
| Ian FREISLICH | Mar 9, 2010 12:26 am | |
| Ian FREISLICH | Mar 9, 2010 5:31 am | |
| Pyun YongHyeon | Mar 9, 2010 12:49 pm | |
| Pyun YongHyeon | Mar 9, 2010 1:21 pm | |
| David Christensen | Mar 9, 2010 1:31 pm | |
| Pyun YongHyeon | Mar 9, 2010 1:39 pm | |
| Ian FREISLICH | Mar 9, 2010 1:55 pm | |
| David Christensen | Mar 9, 2010 2:04 pm | |
| Pyun YongHyeon | Mar 9, 2010 2:12 pm | |
| Ryan Stone | Mar 9, 2010 2:30 pm | |
| Fabien Thomas | Mar 9, 2010 2:55 pm | |
| David Christensen | Mar 9, 2010 3:00 pm | |
| Ryan Stone | Mar 9, 2010 3:07 pm | |
| Ian FREISLICH | Mar 9, 2010 9:47 pm | |
| Ian FREISLICH | Mar 10, 2010 1:04 am | |
| David Christensen | Mar 10, 2010 11:10 am | |
| Pyun YongHyeon | Mar 10, 2010 11:51 am | |
| David Christensen | Mar 10, 2010 2:45 pm | |
| Pyun YongHyeon | Mar 10, 2010 3:01 pm | |
| Ian FREISLICH | Mar 10, 2010 10:45 pm | |
| Ian FREISLICH | Mar 10, 2010 11:05 pm | |
| David Christensen | Mar 12, 2010 3:58 pm | |
| Ian FREISLICH | Mar 13, 2010 9:05 am |
| Subject: | RE: dev.bce.X.com_no_buffers increasing and packet loss | |
|---|---|---|
| From: | David Christensen (davi...@broadcom.com) | |
| Date: | Mar 12, 2010 3:58:08 pm | |
| List: | org.freebsd.freebsd-current | |
Pyun YongHyeon wrote:
On Wed, Mar 10, 2010 at 02:45:47PM -0800, David Christensen wrote:
The bce(4) hardware supports a linked list of pages for RX buffer descriptors. The stock build supports 2 pages (RX_PAGES) with a total of 511 BD's per page. The hardware can support a maximum of 64K BD's but that would be an unnecessarily large amount of mbufs for an infrequent problem.
I think that depends on how you define infrequent. Our use case is a largish core router. It's highly likely that we'll see this again and again in various packet storms on our network.
Are the packet storms always always from the same host or do they come from multiple hosts? The hardware supports RSS which can spread the network load across multiple receive queues and multiple CPU cores, but only when the traffic is spread across several hosts. (The current bce(4) driver doesn't include support for RSS.) If a storm of small frames comes from a single host then almost all adapters will be challenged to handle the flow.
Dave
_______________________________________________ free...@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "free...@freebsd.org"