TL/UCP: select bigger knomial radix for ppn1

[Sergei-Lebedev]

What

Use min raidx=3 for ppn1 teams. Such radix improves performance providing more network parallelism.

# UCC with patch
# OSU MPI-CUDA Broadcast Latency Test v7.3
# Datatype: MPI_CHAR.
# Size       Avg Latency(us)   Min Latency(us)   Max Latency(us)  Iterations
1                       5.97              3.14              8.17        1000
2                       5.89              3.13              8.05        1000
4                       5.93              3.26              8.07        1000
8                       5.88              3.18              8.00        1000
16                      5.89              3.19              7.97        1000
32                      6.00              3.30              8.09        1000
64                      6.62              3.83              8.76        1000
128                     6.67              3.69              8.84        1000
256                     6.34              3.88              8.28        1000
512                     6.34              3.62              8.36        1000
1024                    6.41              4.06              8.48        1000
2048                    6.56              3.87              8.74        1000
4096                    6.92              4.24              9.34        1000
8192                    7.64              4.67             10.12        1000
16384                  14.95              9.16             19.87         100
32768                  18.88             14.46             21.59         100
65536                  28.83             25.68             32.49         100
131072                 39.65             34.42             46.40         100
262144                 50.26             41.51             58.21         100
524288                 75.56             61.76             85.24         100
1048576               123.21             98.07            143.94         100

# UCC without patch
# OSU MPI-CUDA Broadcast Latency Test v7.3
# Datatype: MPI_CHAR.
# Size       Avg Latency(us)   Min Latency(us)   Max Latency(us)  Iterations
1                       6.21              3.58              8.65        1000
2                       6.13              3.51              8.54        1000
4                       6.10              3.41              8.55        1000
8                       6.12              3.42              8.54        1000
16                      6.12              3.50              8.52        1000
32                      6.20              3.56              8.62        1000
64                      6.95              4.30              9.45        1000
128                     6.98              4.04              9.57        1000
256                     6.91              4.68              9.10        1000
512                     7.12              4.67              9.37        1000
1024                    6.93              4.78              9.03        1000
2048                    6.97              4.31              9.44        1000
4096                    7.26              4.80              9.79        1000
8192                    8.23              5.49             11.00        1000
16384                  14.71              8.99             19.75         100
32768                  32.50             25.91             37.50         100
65536                  41.15             32.58             46.29         100
131072                 51.94             40.57             59.31         100
262144                 68.33             53.42             77.67         100
524288                 91.97             72.29            102.24         100
1048576               148.00            111.05            167.37         100

[samnordmann]

Copyright