20b:jtag_race_results
File transfer speed tests
OpenOCD r520, parport vs. USB JTAG adapters
Downloading 128kB from PC to HP20B
| Adapter | DCC enabled? | jtag_speed | Elapsed time |
|---|---|---|---|
| evb_lm3s811 | no | 0x80 | 79.78s |
| evb_lm3s811 | no | 0x40 | 42.56s |
| evb_lm3s811 | no | 0x20 | 23.84s |
| evb_lm3s811 | no | 0x10 | 14.66s |
| evb_lm3s811 | no | 0x8 | 10.05s |
| evb_lm3s811 | no | 0x4 | 9.52s |
| evb_lm3s811 | no | 0x2 | 7.19s |
| evb_lm3s811 | no | 0x1 | 6.53s |
| evb_lm3s811 | no | 0x0 | 5.91s |
| evb_lm3s811 | yes | 0x80 | 20.44s |
| evb_lm3s811 | yes | 0x40 | 18.61s |
| evb_lm3s811 | yes | 0x20 | 9.70s |
| evb_lm3s811 | yes | 0x10 | 5.22s |
| evb_lm3s811 | yes | 0x8 | 3.03s |
| evb_lm3s811 | yes | 0x4 | 1.88s |
| evb_lm3s811 | yes | 0x2 | 1.42s |
| evb_lm3s811 | yes | 0x1 | 1.23s |
| evb_lm3s811 | yes | 0x0 | 1.02s |
| wiggler | no | 0x8 | 136.69s |
| wiggler | no | 0x4 | 76.20s |
| wiggler | no | 0x2 | 46.27s |
| wiggler | no | 0x1 | 31.48s |
| wiggler | no | 0x0 | 16.73s |
| wiggler | yes | 0x8 | 70.56s |
| wiggler | yes | 0x4 | 39.48s |
| wiggler | yes | 0x2 | 23.78s |
| wiggler | yes | 0x1 | 16.16s |
| wiggler | yes | 0x0 | 8.40s |
Uploading 128kB from HP20B to PC
| Adapter | jtag_speed | Elapsed time |
|---|---|---|
| evb_lm3s811 | 0x80 | 81.12s |
| evb_lm3s811 | 0x40 | 44.52s |
| evb_lm3s811 | 0x20 | 26.08s |
| evb_lm3s811 | 0x10 | 15.52s |
| evb_lm3s811 | 0x8 | 11.61s |
| evb_lm3s811 | 0x4 | 8.91s |
| evb_lm3s811 | 0x2 | 8.36s |
| evb_lm3s811 | 0x1 | 8.19s |
| evb_lm3s811 | 0x0 | 7.78s |
| wiggler | 0x1 | 33.98s |
| wiggler | 0x0 | 18.97s |
Conclusions? USB adapters are much quicker, especially on a slow PC such as mine. OpenOCD's DCC download option gives a nice speed boost.
20b/jtag_race_results.txt · Last modified: 2008/07/28 18:31 by newell
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