[Cerowrt-devel] performance numbers from WRT1200AC (Re: Latest build test - new sqm-scripts seem to work; "cake overhead 40" didn't)
dave.taht at gmail.com
Fri Jun 26 13:04:56 EDT 2015
On Fri, Jun 26, 2015 at 9:35 AM, Jonathan Morton <chromatix99 at gmail.com> wrote:
> These would be hardware tail drops - there might not be a physical counter
> recording them. But you could instrument three driver to see whether the
> receive buffer is full when serviced.
/* Max number of Rx descriptors */
#define MVNETA_MAX_RXD 128
this is probably too small, especially given the 64 it is willing to
wait for. At the same time, it is too large, as there are 8 hardware
queues in play here. So you get a huge burst from one flow, it gros it
all together.... aggghh...
/* Max number of Tx descriptors */
#define MVNETA_MAX_TXD 532
this realllllly needs BQL. Same problem(s). Only worse.
> - Jonathan Morton
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> Cerowrt-devel at lists.bufferbloat.net
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