RssiCoreWrapper Resource Requirement
RSSI's Window Address Bit Size | Number of RSSI Segments | RssiCoreWrapper Look-Up Tables (LUTs) | RssiCoreWrapper Flip Flops (FFs) | RssiCoreWrapper Block Rams (36k BRAMs) |
|---|---|---|---|---|
| 1 | 1 | 3,770 | 5,560 | 8 |
| 2 | 4 | 3,851 | 5,774 | 8 |
| 3 | 8 | 4,017 | 6,013 | 10 |
| 4 | 16 | 4,317 | 6,478 | 14 |
| 5 | 32 | 5,025 | 7,217 | 21 |
| 6 | 64 | 5,967 | 9,249 | 35 |
| 7 | 128 | 8,287 | 12,945 | 63 |
UDP + IPv4 Measurements
Performance
RSSI's Window Address Bit Size | Number of RSSI Segments | Throughput Bandwidth (Gbps) |
|---|---|---|
| 1 | 1 | 2.407 |
| 2 | 4 | 4.807 |
| 3 | 8 | 9.051 |
| 4 | 16 | 9.068 |
| 5 | 32 | 9.068 |
| 6 | 64 | 9.068 |
| 7 | 128 | 9.068 |
Note
MAX_RETRANS_CNT_G & MAX_CUM_ACK_CNT_G were set to 0x1 for this testing, which is acceptable for HW-to-HW communication
Latency
RSSI's Window Address Bit Size | Number of RSSI Segments | Packet Size | |||||||
| No Back Pressure | Back Pressure | ||||||||
| 64B | 128B | 256B | 512B | 1kB | 2kB | 4kB | 64kB | ||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 |
1.54 us |
1.76 us |
2.20 us |
3.12 us |
4.06 us |
4.93 us |
4.93 us | 24.21 us |
| 2 | 4 | 15.62 us | |||||||
| 3 | 8 | 9.36 us | |||||||
| 4 | 16 | 16.29 us | |||||||
| 5 | 32 | 28.13 us | |||||||
| 6 | 64 | 28.13 us | |||||||
| 7 | 128 | 28.13 us | |||||||
Back Pressure Latency
From window address size = 1 through 3, then latency decreases as a function of the bandwidth. From window address size = 4 through 7, the latency increases due to the MAC's pause feature executing and storing RSSI frames in the MAC's FIFO.
Raw Ethernet Measurements
Performance
RSSI's Window Address Bit Size | Number of RSSI Segments | Throughput Bandwidth (Gbps) |
|---|---|---|
| 1 | 1 | 3.297 |
| 2 | 4 | 6.585 |
| 3 | 8 | 9.127 |
| 4 | 16 | 9.127 |
Note
MAX_RETRANS_CNT_G & MAX_CUM_ACK_CNT_G were set to 0x1 for this testing, which is acceptable for HW-to-HW communication
Latency
RSSI's Window Address Bit Size | Number of RSSI Segments | Packet Size | |||||||
| No Back Pressure | Back Pressure | ||||||||
| 64B | 128B | 256B | 512B | 1kB | 2kB | 4kB | 64kB | ||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1.20 us |
1.35 us |
1.65 us |
2.26 us |
2.89 us |
3.46 us |
3.46 us | 17.26 us |
| 2 | 4 | 10.60 us | |||||||
| 3 | 8 | 9.43 us | |||||||
| 4 | 16 | 10.56 us | |||||||
Note:
For the 64B transfer:
Going through the RSSI server takes 230 ns. Going through the RSSI clients takes 230 ns. It takes 740 ns to go from the MAC server to the MAC client.
Overview
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