Lc0 mit demux

By Lothar Jung Date 2019-12-09 09:26

... ist schneller bei zwei GPU:

**Match**: Battle of 58523 with **2 RTX: demux vs multiplexing**
**LC0 version:** 0.22
**LC0 options:** cudnn-fp16, *cpuct=2.08, fpu-value=0.47, policy-softmax-temp=1.92, move-overhead=50*
**Time control:** 3+0.3
**Hardware:** RTX 2070
**Book:** Balsa special book (100), in sequence, reversed color
**Tablebases:** 6-man TB
**Adjudication**: 6-man TB, -draw movenumber=50 movecount=5 score=8 -resign movecount=5 score=1000
**Software:**cutechess-cli
**Speed:** lc0 benchmark in 1M nodes: **multiplexing: 85.6 knps, demux: 107 knps**

**Comments:** demux vs multiplexing: +13 -10 =177 (+5 elo): demux wins in error bar, and demux is faster than multiplexing in benchmark.

```diff
2xRTX 2070, tc=3+0.3s, cpuct=2.08, fpu-value=0.47, policy-softmax-temp=1.92, move-overhead=50,
demux vs multiplexing

   # PLAYER    : RATING ERROR POINTS PLAYED   (%) CFS(%) W D L
   1 lc0.net.58523.2GPU.demux    :    5    17   101.5    200 50.8 73   13 177   10
   2 lc0.net.58523.2GPU.multiplexing :    0   ---- 98.5    200 49.3    ---   10 177   13
```

By Lothar Jung Date 2019-12-10 01:28

Hier ist ein weiterer Test:

**Match**: 61390 (multiplexing) vs 58552(demux) at 10s+1s in 2 x RTX 2070
**LC0 version:** 0.22
**LC0 options:** multiplexing for 61390, demux for 58552, cudnn-fp16, default parameters
**Time control:** 10s+1s
**Hardware:** 2xRTX 2070
**Book:** Chad 4ply book (100 openings with only 2 moves), in sequence, reversed color
**Tablebases:** 6-man TB
**Adjudication**: chess rule (checkmate, repetition, 50 moves) + 6-man TB win/draw
**Software:**cutechess-cli
**Speed:** benchmark for about 2 seconds (about time per move in this test): 61390: 18 knps, 58552: multiplexing: 93 knps, demux: 127 knps

**Comments:** The 58552 with demux options beat 61390 in 2x2070 (multiplexing as previous test): +23 -11 =166 (+21 elo) which beats 58552 with multiplexing option <https://discordapp.com/channels/425419482568196106/530486338236055583/653195730906775574>. T60 might not have the best option for 2x2070 with multiplexing, but it is not the goal of this test.

```diff
2xRTX 2070, tc=10s+1s, default parameters, chad 4ply book:

   # PLAYER    : RATING ERROR POINTS PLAYED   (%) CFS(%) W D L
+ 1 lc0.net.58552.demux : 21    15   106.0    200 53.0 98   23 166   11
   2 lc0.net.61390 :    0 9   198.5    400 49.6 95   30 337   33
   3 lc0.net.58552 :    -16    14 95.5    200 47.8    ---   10 171   19

White advantage = 29.92 +/- 9.13
Draw rate (equal opponents) = 88.50 % +/- 2.48
```

By Eduard Nemeth Date 2019-12-10 08:28

Das neuere T 58583 scheint einen Tick stärker zu sein. Richtig klasse das neue kleine Netz.