[dpdk-dev] [PATCH 0/5] app/test: unit test to measure cycles per packet

Cunming Liang cunming.liang at intel.com
Mon Aug 25 08:12:49 CEST 2014

It provides unit test to measure cycles/packet in NIC loopback mode.
It simply gives the average cycles of IO used per packet without test equipment.
When doing the test, make sure the link is UP.

There's two stream control mode support, one is continues, another is burst.
The former continues to forward the injected packets until reaching a certain amount of number.
The latter one stop when all the injected packets are received.
In burst stream, now measure two situations, with or without desc. cache conflict.
By default, it runs in continues stream mode to measure the whole rxtx.

Usage Example:
1. Run unit test app in interactive mode
    app/test -c f -n 4 -- -i
2. Set stream control mode, by default is continuous
    set_rxtx_sc [continuous|poll_before_xmit|poll_after_xmit]
3. If choose continuous stream, there are another two options can configure
    3.1 choose rx/tx pair, default is vector
        set_rxtx_mode [vector|scalar|full|hybrid]
        Note: To get acurate scalar fast, plz choose 'vector' or 'hybrid' without INC_VEC=y in config 
    3.2 choose the area of masurement, default is rxtx
        set_rxtx_anchor [rxtx|rxonly|txonly]
4. Run and wait for the result

For who simply just want to see how much cycles cost per packet.
Compile DPDK, Run 'app/test', and type 'pmd_perf_autotest', that's it.
Nothing else needs to configure. 
Using other options when you understand and what to measures more. 

Cunming Liang (5):
  app/test: unit test for rx and tx cycles/packet
  app/test: measure standalone rx or tx cycles/packet
  ixgbe/vpmd: add fix to store unaligned mbuf point array
  app/test: add unit test to measure RX burst cycles
  app/test: allow to create packets in different sizes

 app/test/Makefile                     |   1 +
 app/test/commands.c                   | 114 +++++
 app/test/packet_burst_generator.c     |  26 +-
 app/test/packet_burst_generator.h     |  11 +-
 app/test/test.h                       |   8 +
 app/test/test_link_bonding.c          |  39 +-
 app/test/test_pmd_perf.c              | 918 ++++++++++++++++++++++++++++++++++
 lib/librte_pmd_ixgbe/ixgbe_ethdev.c   |   6 +
 lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c |   4 +-
 9 files changed, 1092 insertions(+), 35 deletions(-)
 create mode 100644 app/test/test_pmd_perf.c


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