| Commit message (Collapse) | Author | Age | Files | Lines |
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Submitted by: <dt71@gmx.com>
MFC after: 3 days
X-MFC with: r251848
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device_method_t arrays
Reviewed by: cognet
Approved by: cognet
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malloc(9) flags in sys/dev.
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tree used it incorrectly, which lead to inaccurate overrated
if_obytes accounting. The drbr(9) used to update ifnet stats on
drbr_enqueue(), which is not accurate since enqueuing doesn't
imply successful processing by driver. Dequeuing neither mean
that. Most drivers also called drbr_stats_update() which did
accounting again, leading to doubled if_obytes statistics. And
in case of severe transmitting, when a packet could be several
times enqueued and dequeued it could have been accounted several
times.
o Thus, make drbr(9) API thinner. Now drbr(9) merely chooses between
ALTQ queueing or buf_ring(9) queueing.
- It doesn't touch the buf_ring stats any more.
- It doesn't touch ifnet stats anymore.
- drbr_stats_update() no longer exists.
o buf_ring(9) handles its stats itself:
- It handles br_drops itself.
- br_prod_bytes stats are dropped. Rationale: no one ever
reads them but update of a common counter on every packet
negatively affects performance due to excessive cache
invalidation.
- buf_ring_enqueue_bytes() reduced to buf_ring_enqueue(), since
we no longer account bytes.
o Drivers handle their stats theirselves: if_obytes, if_omcasts.
o mlx4(4), igb(4), em(4), vxge(4), oce(4) and ixv(4) no longer
use drbr_stats_update(), and update ifnet stats theirselves.
o bxe(4) was the most correct driver, it didn't call
drbr_stats_update(), thus it was the only driver accurate under
moderate load. Now it also maintains stats itself.
o ixgbe(4) had already taken stats from hardware, so just
- drop software stats updating.
- take multicast packet count from hardware as well.
o mxge(4) just no longer needs NO_SLOW_STATS define.
o cxgb(4), cxgbe(4) need no change, since they obtain stats
from hardware.
Reviewed by: jfv, gnn
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Approved by: cperciva
MFC after: 3 days
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warning: equality comparison with extraneous parentheses
[-Wparentheses-equality]
Reported by: arundel
Reviewed by: gnn
Approved by: cperciva
MFC after: 3 days
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Reviewed by: yongari
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MFC after: 2 weeks
Sponsored by: Isilon Systems, LLC
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- change "the the" to "the"
Approved by: lstewart
Approved by: sahil (mentor)
MFC after: 3 days
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Submitted by: Sriram Rapuru at @ Wipro for Exar Inc.
MFC after: 2 weeks
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Features: Jumbo frames (up to 9600), LRO (Large Receive Offload),
TSO (TCP segmentation offload), RTH (Receive Traffic Hash).
Submitted by: Sriram Rapuru at Exar
MFC after: 2 weeks
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