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| author | Trieu 'Andrew' Nguyen <trieux.t.nguyen@intel.com> | 2010-02-10 10:27:34 -0800 |
|---|---|---|
| committer | Reinette Chatre <reinette.chatre@intel.com> | 2010-02-11 10:27:41 -0800 |
| commit | 1db5950f1d0b82e07371b211a48317b8972da063 (patch) | |
| tree | 6fc4f38f2c8cfd3a212c5eb18e326dd5d409ca2c /net/can | |
| parent | a9e10fb9b1c6ad16e73cf2656951fce3a817611e (diff) | |
| download | blackbird-op-linux-1db5950f1d0b82e07371b211a48317b8972da063.tar.gz blackbird-op-linux-1db5950f1d0b82e07371b211a48317b8972da063.zip | |
iwlwifi: Monitor and recover the aggregation TX flow failure
This change monitors the tx statistics to detect the drop in throughput.
When the throughput drops, the ratio of the actual_ack_count and the expected_
ack_count also drops. At the same time, the aggregated ba_timeout (the number
of ba timeout retries) also rises. If the actual_ack_count/expected_ack_count
ratio is 0 and the number of ba timeout retries rises to 16, no tx packets
(tcp, udp, or ping - icmp) can be delivered. The driver recovers from this
situation by reseting the uCode firmware. If the actual_ack_count/expected_
ack_count ratio drops below 50% (but not 0) and the aggregated ba_timeout
retries just exceed 5 (but not 16), then the driver can reset the radio to
bring the throughput up.
Signed-off-by: Trieu 'Andrew' Nguyen <trieux.t.nguyen@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Diffstat (limited to 'net/can')
0 files changed, 0 insertions, 0 deletions
