[PATCH v3 5/7] math: Remove powerpc e_hypot
Paul A. Clarke
pc@us.ibm.com
Tue Nov 9 19:28:00 GMT 2021
On Mon, Nov 01, 2021 at 05:20:57PM -0300, Adhemerval Zanella via Libc-alpha wrote:
> The powerpc64 does show a big difference (which is mitigated slightly
> by the last path):
>
> power9 master:
>
> "hypot": {
> "workload-random": {
> "duration": 5.41027e+08,
> "iterations": 3.6e+07,
> "reciprocal-throughput": 14.6467,
> "latency": 15.4103,
> "max-throughput": 6.82746e+07,
> "min-throughput": 6.48916e+07
> }
> }
>
> power9 patched:
>
> "hypot": {
> "workload-random": {
> "duration": 5.37776e+08,
> "iterations": 2.4e+07,
> "reciprocal-throughput": 19.915,
> "latency": 24.8997,
> "max-throughput": 5.02135e+07,
> "min-throughput": 4.01612e+07
> }
> }
>
> power8 master:
>
> "hypot": {
> "workload-random": {
> "duration": 5.27104e+08,
> "iterations": 3.2e+07,
> "reciprocal-throughput": 15.872,
> "latency": 17.072,
> "max-throughput": 6.3004e+07,
> "min-throughput": 5.85755e+07
> }
> }
>
> power8 patched:
>
> "hypot": {
> "workload-random": {
> "duration": 5.21972e+08,
> "iterations": 2.2e+07,
> "reciprocal-throughput": 21.8583,
> "latency": 25.5937,
> "max-throughput": 4.57493e+07,
> "min-throughput": 3.9072e+07
> }
> }
The patches see poorer performance on Power10, also:
Power10 unpatched:
"hypot": {
"workload-random": {
"duration": 5.33875e+08,
"iterations": 4.8e+07,
"reciprocal-throughput": 8.47089,
"latency": 13.7739,
"max-throughput": 1.18051e+08,
"min-throughput": 7.2601e+07
}
}
Power10 patched:
"hypot": {
"workload-random": {
"duration": 5.34469e+08,
"iterations": 3.8e+07,
"reciprocal-throughput": 9.80905,
"latency": 18.3209,
"max-throughput": 1.01947e+08,
"min-throughput": 5.45825e+07
}
}
PC
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