Set the reference nps for SFNNv8:L1-2560

Fishtest with Stockfish 11 had 1.6Mnps as reference nps and
0.7Mnps as threshold for the slow worker.
Set the new reference nps to 560knps according to the 65% slowdown
of SF16 with SFNNv8:L1-2560 wrt SF11 on ARCH=x86-64-bmi2
Set the new threshold for slow worker to 203knps according to the 71% slowdown
of SF16 with SFNNv8:L1-2560i wrt SF11 on ARCH=x86-64-sse41-popcnt

compiler clang++ 16.0.6

- arch=bmi2 (Intel Xeon CPU E5-2680 v3)
```
sf_base =  1579950 +/-   8197 (95%)
sf_test =   555524 +/-   4331 (95%)
diff    = -1024426 +/-   6115 (95%)
speedup = -64.839% +/- 0.387% (95%)
```
- arch=sse41-popcnt (Intel core i7 3770k)
```
sf_base =  1790486 +/-  19610 (95%)
sf_test =   532610 +/-   6143 (95%)
diff    = -1257876 +/-  13960 (95%)
speedup = -70.253% +/- 0.780% (95%)
```

Raise worker version to 218, also server side.

server/fishtest/api.py

@@ -25,7 +25,7 @@
 on how frequently the main instance flushes its run cache.
 """
 
-WORKER_VERSION = 217
+WORKER_VERSION = 218
 
 
 def validate_request(request):

server/fishtest/rundb.py

@@ -533,7 +533,7 @@ def aggregate_unfinished_runs(self, username=None):
                     nps += concurrency * task["worker_info"]["nps"]
                     if task["worker_info"]["nps"] != 0:
                         games_per_minute += (
-                            (task["worker_info"]["nps"] / 640000)
+                            (task["worker_info"]["nps"] / 560000)
                             * (60.0 / estimate_game_duration(run["args"]["tc"]))
                             * (
                                 int(task["worker_info"]["concurrency"])

server/utils/delta_update_users.py

@@ -48,7 +48,7 @@ def compute_games_rates(rundb, info_tuple):
     # 1184000 nps is the reference core, also set in rundb.py and games.py
     for machine in rundb.get_machines():
         games_per_hour = (
-            (machine["nps"] / 640000)
+            (machine["nps"] / 560000)
             * (3600.0 / estimate_game_duration(machine["run"]["args"]["tc"]))
             * (int(machine["concurrency"]) // machine["run"]["args"].get("threads", 1))
         )

worker/games.py

@@ -1335,15 +1335,16 @@ def parse_options(s):
         games_concurrency * threads,
     )
 
-    if base_nps < 231000 / (1 + math.tanh((worker_concurrency - 1) / 8)):
+    if base_nps < 203000 / (1 + math.tanh((worker_concurrency - 1) / 8)):
         raise FatalException(
             "This machine is too slow ({} nps / thread) to run fishtest effectively - sorry!".format(
                 base_nps
             )
         )
-    # 1184000 nps is the reference core benched with respect to SF 11,
+    # fishtest with Stockfish 11 had 1.6Mnps as reference nps and
+    # 0.7Mnps as threshold for the slow worker.
     # also set in rundb.py and delta_update_users.py
-    factor = 640000 / base_nps
+    factor = 560000 / base_nps
 
     # Adjust CPU scaling.
     _, tc_limit_ltc = adjust_tc("60+0.6", factor)

worker/sri.txt

@@ -1 +1 @@
-{"__version": 217, "updater.py": "Mg+pWOgGA0gSo2TuXuuLCWLzwGwH91rsW1W3ixg3jYauHQpRMtNdGnCfuD1GqOhV", "worker.py": "cFunWo4iviMvzdV9b/8PTfOLoXbovy4hWwmGR6OI70agi5dkwoCJ07BoYwBU+xjd", "games.py": "pqyY62ZE491mecjnXvByfr1mMuhXU5NDg6BbE6WZ4aKuzR12bSFQUSHrQnDt7374"}
+{"__version": 218, "updater.py": "Mg+pWOgGA0gSo2TuXuuLCWLzwGwH91rsW1W3ixg3jYauHQpRMtNdGnCfuD1GqOhV", "worker.py": "JTcLpyoueO7A/L7xaZVhPowKXwqXzIcQL615cc0Gm+bwbefz9hUNuIUyUD+pL8is", "games.py": "4knSQ74ckM5BN87NeYNoUZHbOtD8c9/ykea612at3wEPO7g3c/ybxrlRFDalaslw"}

worker/worker.py

@@ -54,7 +54,7 @@
 # Several packages are called "expression".
 # So we make sure to use the locally installed one.
 
-WORKER_VERSION = 217
+WORKER_VERSION = 218
 FILE_LIST = ["updater.py", "worker.py", "games.py"]
 HTTP_TIMEOUT = 30.0
 INITIAL_RETRY_TIME = 15.0