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authorTal Gilboa <talgi@mellanox.com>2018-03-30 15:50:08 -0700
committerDavid S. Miller <davem@davemloft.net>2018-04-01 20:54:41 -0400
commit48bfc39791b8b4a25f165e711f18b9c1617cefbc (patch)
treee0142eeb7a3d69dfeba795481bd1bd38183cc641 /drivers/net/ethernet/marvell/sky2.c
parentibmvnic: Disable irqs before exiting reset from closed state (diff)
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net/mlx5e: Set EQE based as default TX interrupt moderation mode
The default TX moderation mode was mistakenly set to CQE based. The intention was to add a control ability in order to improve some specific use-cases. In general, we prefer to use EQE based moderation as it gives much better numbers for the common cases. CQE based causes a degradation in the common case since it resets the moderation timer on CQE generation. This causes an issue when TSO is well utilized (large TSO sessions). The timer is set to 16us so traffic of ~64KB TSO sessions per second would mean timer reset (CQE per TSO session -> long time between CQEs). In this case we quickly reach the tcp_limit_output_bytes (256KB by default) and cause a halt in TX traffic. By setting EQE based moderation we make sure timer would expire after 16us regardless of the packet rate. This fixes an up to 40% packet rate and up to 23% bandwidth degradtions. Fixes: 0088cbbc4b66 ("net/mlx5e: Enable CQE based moderation on TX CQ") Signed-off-by: Tal Gilboa <talgi@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/marvell/sky2.c')
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