Merge branch 'xdp-more-work-on-xdp-tracepoints'

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Jesper Dangaard Brouer says:

====================
xdp: more work on xdp tracepoints

More work on streamlining and performance optimizing the tracepoints
for XDP.

I've created a simple xdp_monitor application that uses this
tracepoint, and prints statistics. Available at github:

https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/samples/bpf/xdp_monitor_kern.c
https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/samples/bpf/xdp_monitor_user.c

The improvement over tracepoint with strcpy: 9810372 - 8428762 = +1381610 pps faster
 - (1/9810372 - 1/8428762)*10^9 = -16.7 nanosec
 - 100-(8428762/9810372*100) = strcpy-trace is 14.08% slower
 - 981037/8428762*100 = removing strcpy made it 11.64% faster

V3: Fix merge conflict with commit e4a8e817d3 ("bpf: misc xdp redirect cleanups")
V2: Change trace_xdp_redirect() to align with args of trace_xdp_exception()
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

David S. Miller 2017-08-24 11:59:37 -07:00

parent fb3bbbda5f 315ec3990e

commit e7d12ce121

5 changed files with 49 additions and 45 deletions

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4

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

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include/linux/filter.h

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36

include/trace/events/xdp.h

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net/core/dev.c

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net/core/filter.c

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