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[hermon] Reduce the RC ACK timeout 

The ACK timeout determines how long we take to notice a failed
Reliable Connection.  Reducing it from the arbitrary value of 19 down
to 14 reduces the individual ACK timeout from around 2.1s to 67ms;
this in turn reduces the time to tear down and re-establish a broken
SRP session from around 30s to around 1s.
This commit is contained in:
Michael Brown 2009-08-10 02:10:17 +01:00
parent 0b1222f233
commit 1175f0cf29
1 changed files with 1 additions and 1 deletions
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2
src/drivers/infiniband/hermon.c
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@ -1108,7 +1108,7 @@ static int hermon_modify_qp ( struct ib_device *ibdev,
memset ( &qpctx, 0, sizeof ( qpctx ) );
MLX_FILL_1 ( &qpctx, 10,
qpc_eec_data.primary_address_path.ack_timeout,
0x13 );
14 /* 4.096us * 2^(14) = 67ms */ );
MLX_FILL_2 ( &qpctx, 30,
qpc_eec_data.retry_count, HERMON_RETRY_MAX,
qpc_eec_data.rnr_retry, HERMON_RETRY_MAX );