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Automatically set goroutines based on shardSize (#5346)

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Update reedsolomon library to enable feature to automatically
set number of go-routines based on the input shard size,
since shard size is sort of a constant in Minio for
objects > 10MiB (default blocksize)

klauspost reported around 15-20% improvement in performance
numbers on older systems such as AVX and SSE3

```
name                  old speed      new speed      delta
Encode10x2x10000-8    5.45GB/s ± 1%  6.22GB/s ± 1%  +14.20%    (p=0.000 n=9+9)
Encode100x20x10000-8  1.44GB/s ± 1%  1.64GB/s ± 1%  +13.77%  (p=0.000 n=10+10)
Encode17x3x1M-8       10.0GB/s ± 5%  12.0GB/s ± 1%  +19.88%  (p=0.000 n=10+10)
Encode10x4x16M-8      7.81GB/s ± 5%  8.56GB/s ± 5%   +9.58%   (p=0.000 n=10+9)
Encode5x2x1M-8        15.3GB/s ± 2%  19.6GB/s ± 2%  +28.57%   (p=0.000 n=9+10)
Encode10x2x1M-8       12.2GB/s ± 5%  15.0GB/s ± 5%  +22.45%  (p=0.000 n=10+10)
Encode10x4x1M-8       7.84GB/s ± 1%  9.03GB/s ± 1%  +15.19%    (p=0.000 n=9+9)
Encode50x20x1M-8      1.73GB/s ± 4%  2.09GB/s ± 4%  +20.59%   (p=0.000 n=10+9)
Encode17x3x16M-8      10.6GB/s ± 1%  11.7GB/s ± 4%  +10.12%   (p=0.000 n=8+10)
```
This commit is contained in:
Harshavardhana
2018-01-03 13:47:22 -08:00
committed by kannappanr
parent b1fb550d5c
commit c0721164be
13 changed files with 151 additions and 47 deletions
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2
cmd/erasure_test.go
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@@ -52,7 +52,7 @@ func TestErasureDecode(t *testing.T) {
copy(buffer, data)
disks := make([]StorageAPI, test.dataBlocks+test.parityBlocks)
storage, err := NewErasureStorage(disks, test.dataBlocks, test.parityBlocks)
storage, err := NewErasureStorage(disks, test.dataBlocks, test.parityBlocks, blockSizeV1)
if err != nil {
t.Fatalf("Test %d: failed to create erasure storage: %v", i, err)
}