On 02/21/2017 01:09 PM, Felix Manlunas wrote:
From: VSR Burru <veerasenareddy.bu...@cavium.com>
Improve UDP TX performance by:
* reducing the ring size from 2K to 512
* replacing the numerous streaming DMA allocations for info buffers and
gather lists with one large consistent DMA allocation per ring
Netperf benchmark numbers before and after patch:
PF UDP TX
+--------+--------+------------+------------+---------+
| | | Before | After | |
| Number | | Patch | Patch | |
| of | Packet | Throughput | Throughput | Percent |
| Flows | Size | (Gbps) | (Gbps) | Change |
+--------+--------+------------+------------+---------+
| | 360 | 0.52 | 0.93 | +78.9 |
| 1 | 1024 | 1.62 | 2.84 | +75.3 |
| | 1518 | 2.44 | 4.21 | +72.5 |
+--------+--------+------------+------------+---------+
| | 360 | 0.45 | 1.59 | +253.3 |
| 4 | 1024 | 1.34 | 5.48 | +308.9 |
| | 1518 | 2.27 | 8.31 | +266.1 |
+--------+--------+------------+------------+---------+
| | 360 | 0.40 | 1.61 | +302.5 |
| 8 | 1024 | 1.64 | 4.24 | +158.5 |
| | 1518 | 2.87 | 6.52 | +127.2 |
+--------+--------+------------+------------+---------+
VF UDP TX
+--------+--------+------------+------------+---------+
| | | Before | After | |
| Number | | Patch | Patch | |
| of | Packet | Throughput | Throughput | Percent |
| Flows | Size | (Gbps) | (Gbps) | Change |
+--------+--------+------------+------------+---------+
| | 360 | 1.28 | 1.49 | +16.4 |
| 1 | 1024 | 4.44 | 4.39 | -1.1 |
| | 1518 | 6.08 | 6.51 | +7.1 |
+--------+--------+------------+------------+---------+
| | 360 | 2.35 | 2.35 | 0.0 |
| 4 | 1024 | 6.41 | 8.07 | +25.9 |
| | 1518 | 9.56 | 9.54 | -0.2 |
+--------+--------+------------+------------+---------+
| | 360 | 3.41 | 3.65 | +7.0 |
| 8 | 1024 | 9.35 | 9.34 | -0.1 |
| | 1518 | 9.56 | 9.57 | +0.1 |
+--------+--------+------------+------------+---------+
Some good looking numbers there. As one approaches the wire limit for
bitrate, the likes of a netperf service demand can be used to
demonstrate the performance change - though there isn't an easy way to
do that for parallel flows.
happy benchmarking,
rick jones
