IB/hfi1: Optimize process_receive_ib()

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The arguments for trace_hfi1_rcvhdr() get computed every
time in the hot path regardless of the whether the trace
is on or off. This is seen to be costly with a profile.
The handling of fault inject isolates the verbs device for
all packets regardless of the presence of a RHF_DC_ERR error.

Fix the first by computing trace_hfi1_rcvhdr() arguments within
the trace itself, so that when the trace is off, the argument
data isn't computed. Fix the second by moving the error check to
handle_eflags() when an RHF error occurs and by testing for
RHF_DC_ERR before executing the reset of handle_eflags().

Reviewed-by: Don Hiatt <don.hiatt@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

...

This commit is contained in:

Sebastian Sanchez 2018-02-01 10:46:46 -08:00 • committed by Jason Gunthorpe

parent ca85bb1ca9

commit aca7f4fc32

2 changed files with 17 additions and 32 deletions

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21

drivers/infiniband/hw/hfi1/driver.c

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28

drivers/infiniband/hw/hfi1/trace_rx.h

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