[dpdk-dev] [RFC] PMD for performance measurement

[mukawa@igel.co.jp]

From: Tetsuya Mukawa <mukawa@igel.co.jp>

Hi,

I want to measure throughputs like following cases.

- path connected by RING PMDs
- path connected by librte_vhost and virtio-net PMD
- path connected by MEMNIC PMDs
- .....

Is there anyone want to do same thing?

Anyway, I guess those throughputs may be too high for some devices like ixia.
But it's a bit pain to write or fix applications just for measuring.

I guess a PMD like '/dev/null' and testpmd application will help.
This patch set is RFC of a PMD like '/dev/null'.
Please see the first commit of this patch set.


Here is a my plan to use this PMD

+-------------------------------+
|           testpmd1            |
+-------------+------+----------+
| Target PMD1 |      | null PMD |
+---++--------+      +----------+
    ||
    || Target path
    ||
+---++--------+      +----------+
| Target PMD2 |      | null PMD |
+-------------+------+----------+
|           testpmd2            |
+-------------------------------+

The testpmd1 or testpmd2 will start with "start tx_first". It causes huge
transfers.

The result is not thuroughput of PMD1 or PMD2, but throughput
between PMD1 and PMD2. But I guess it's enough to know rough thuroughput.
Also it's nice for measuing that the same environment can be used.

Any suggestions or comments?

Thanks,
Tetsuya

--
Tetsuya Mukawa (1):
  librte_pmd_null: Add null PMD

 config/common_bsdapp               |   5 +
 config/common_linuxapp             |   5 +
 lib/Makefile                       |   1 +
 lib/librte_pmd_null/Makefile       |  58 +++++
 lib/librte_pmd_null/rte_eth_null.c | 474 +++++++++++++++++++++++++++++++++++++
 5 files changed, 543 insertions(+)
 create mode 100644 lib/librte_pmd_null/Makefile
 create mode 100644 lib/librte_pmd_null/rte_eth_null.c

-- 
1.9.1