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fairyfishnet.py
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fairyfishnet.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of the pychess-variants fairyfishnet client.
# Copyright (C) 2016-2019 Niklas Fiekas <[email protected]>
# Copyright (C) 2019 Bajusz Tamás <[email protected]>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Distributed Fairy-Stockfish analysis for Liatomic"""
from __future__ import print_function
from __future__ import division
import argparse
import logging
import json
import time
import random
import collections
import contextlib
import multiprocessing
import threading
import site
import struct
import sys
import os
import stat
import platform
import re
import textwrap
import getpass
import signal
import ctypes
import string
# import glob
try:
import requests
except ImportError:
print("fishnet requires the 'requests' module.", file=sys.stderr)
print("Try 'pip install requests' or install python-requests from your distro packages.", file=sys.stderr)
print(file=sys.stderr)
raise
if os.name == "posix" and sys.version_info[0] < 3:
try:
import subprocess32 as subprocess
except ImportError:
import subprocess
else:
import subprocess
try:
import urlparse
except ImportError:
import urllib.parse as urlparse
try:
import configparser
except ImportError:
import ConfigParser as configparser
try:
import queue
except ImportError:
import Queue as queue
try:
from shlex import quote as shell_quote
except ImportError:
from pipes import quote as shell_quote
try:
# Python 2
input = raw_input
except NameError:
pass
try:
import pyffish as sf
sf_ok = True
try:
sf.set_option("VariantPath", "variants.ini")
except Exception:
print("No variants.ini found.", file=sys.stderr)
raise
try:
print(sf.version())
except Exception:
print("fairyfishnet requires pyffish >=0.0.57", file=sys.stderr)
raise
except ImportError:
print("No pyffish module installed!", file=sys.stderr)
sf_ok = False
raise
try:
# Python 3
DEAD_ENGINE_ERRORS = (EOFError, IOError, BrokenPipeError)
except NameError:
# Python 2
DEAD_ENGINE_ERRORS = (EOFError, IOError)
__version__ = "1.16.2"
__author__ = "Bajusz Tamás"
__email__ = "[email protected]"
__license__ = "GPLv3+"
DEFAULT_ENDPOINT = "https://li-atomic.herokuapp.com/fishnet/"
STOCKFISH_RELEASES = "https://api.github.com/repos/ianfab/Fairy-Stockfish/releases/latest"
DEFAULT_THREADS = 3
HASH_MIN = 16
HASH_DEFAULT = 256
HASH_MAX = 512
MAX_BACKOFF = 30.0
MAX_FIXED_BACKOFF = 3.0
HTTP_TIMEOUT = 15.0
STAT_INTERVAL = 60.0
DEFAULT_CONFIG = "fishnet.ini"
PROGRESS_REPORT_INTERVAL = 5.0
CHECK_PYPI_CHANCE = 0.01
LVL_SKILL = [-4, 0, 3, 6, 10, 14, 16, 18, 20]
LVL_MOVETIMES = [50, 50, 100, 150, 200, 300, 400, 500, 1000]
LVL_DEPTHS = [1, 1, 1, 2, 3, 5, 8, 13, 22]
def intro():
return r"""
. _________ . .
. (.. \_ , |\ /|
. \ O \ /| \ \/ /
. \______ \/ | \ / _____ _ _ _ _ _
. vvvv\ \ | / | | ___(_)___| |__ | \ | | ___| |_
. \^^^^ == \_/ | | |_ | / __| '_ \| \| |/ _ \ __|
. `\_ === \. | | _| | \__ \ | | | |\ | __/ |_
. / /\_ \ / | |_| |_|___/_| |_|_| \_|\___|\__| %s
. |/ \_ \| /
. \________/ Distributed Fairy-Stockfish analysis for Liatomic
""".lstrip() % __version__
PROGRESS = 15
ENGINE = 5
logging.addLevelName(PROGRESS, "PROGRESS")
logging.addLevelName(ENGINE, "ENGINE")
class LogFormatter(logging.Formatter):
def format(self, record):
# Format message
msg = super(LogFormatter, self).format(record)
# Add level name
if record.levelno in [logging.INFO, PROGRESS]:
with_level = msg
else:
with_level = "%s: %s" % (record.levelname, msg)
# Add thread name
if record.threadName == "MainThread":
return with_level
else:
return "%s: %s" % (record.threadName, with_level)
class CollapsingLogHandler(logging.StreamHandler):
def __init__(self, stream=sys.stdout):
super(CollapsingLogHandler, self).__init__(stream)
self.last_level = logging.INFO
self.last_len = 0
def emit(self, record):
try:
if self.last_level == PROGRESS:
if record.levelno == PROGRESS:
self.stream.write("\r")
else:
self.stream.write("\n")
msg = self.format(record)
if record.levelno == PROGRESS:
self.stream.write(msg.ljust(self.last_len))
self.last_len = max(len(msg), self.last_len)
else:
self.last_len = 0
self.stream.write(msg)
self.stream.write("\n")
self.last_level = record.levelno
self.flush()
except Exception:
self.handleError(record)
class TailLogHandler(logging.Handler):
def __init__(self, capacity, max_level, flush_level, target_handler):
super(TailLogHandler, self).__init__()
self.buffer = collections.deque(maxlen=capacity)
self.max_level = max_level
self.flush_level = flush_level
self.target_handler = target_handler
def emit(self, record):
if record.levelno < self.max_level:
self.buffer.append(record)
if record.levelno >= self.flush_level:
while self.buffer:
record = self.buffer.popleft()
self.target_handler.handle(record)
class CensorLogFilter(logging.Filter):
def __init__(self, keyword):
self.keyword = keyword
def censor(self, msg):
try:
# Python 2
if not isinstance(msg, basestring):
return msg
except NameError:
# Python 3
if not isinstance(msg, str):
return msg
if self.keyword:
return msg.replace(self.keyword, "*" * len(self.keyword))
else:
return msg
def filter(self, record):
record.msg = self.censor(record.msg)
record.args = tuple(self.censor(arg) for arg in record.args)
return True
def setup_logging(verbosity, stream=sys.stdout):
logger = logging.getLogger()
logger.setLevel(ENGINE)
handler = logging.StreamHandler(stream)
if verbosity >= 3:
handler.setLevel(ENGINE)
elif verbosity >= 2:
handler.setLevel(logging.DEBUG)
elif verbosity >= 1:
handler.setLevel(PROGRESS)
else:
if stream.isatty():
handler = CollapsingLogHandler(stream)
handler.setLevel(PROGRESS)
else:
handler.setLevel(logging.INFO)
if verbosity < 2:
logging.getLogger("urllib3").setLevel(logging.WARNING)
logging.getLogger("requests.packages.urllib3").setLevel(logging.WARNING)
tail_target = logging.StreamHandler(stream)
tail_target.setFormatter(LogFormatter())
logger.addHandler(TailLogHandler(35, handler.level, logging.ERROR, tail_target))
handler.setFormatter(LogFormatter())
logger.addHandler(handler)
def base_url(url):
url_info = urlparse.urlparse(url)
return "%s://%s/" % (url_info.scheme, url_info.hostname)
class ConfigError(Exception):
pass
class UpdateRequired(Exception):
pass
class Shutdown(Exception):
pass
class ShutdownSoon(Exception):
pass
class SignalHandler(object):
def __init__(self):
self.ignore = False
signal.signal(signal.SIGTERM, self.handle_term)
signal.signal(signal.SIGINT, self.handle_int)
try:
signal.signal(signal.SIGUSR1, self.handle_usr1)
except AttributeError:
# No SIGUSR1 on Windows
pass
def handle_int(self, signum, frame):
if not self.ignore:
self.ignore = True
raise ShutdownSoon()
def handle_term(self, signum, frame):
if not self.ignore:
self.ignore = True
raise Shutdown()
def handle_usr1(self, signum, frame):
if not self.ignore:
self.ignore = True
raise UpdateRequired()
def open_process(command, cwd=None, shell=True, _popen_lock=threading.Lock()):
kwargs = {
"shell": shell,
"stdout": subprocess.PIPE,
"stderr": subprocess.STDOUT,
"stdin": subprocess.PIPE,
"bufsize": 1, # Line buffered
"universal_newlines": True,
}
if cwd is not None:
kwargs["cwd"] = cwd
# Prevent signal propagation from parent process
try:
# Windows
kwargs["creationflags"] = subprocess.CREATE_NEW_PROCESS_GROUP
except AttributeError:
# Unix
kwargs["preexec_fn"] = os.setpgrp
with _popen_lock: # Work around Python 2 Popen race condition
return subprocess.Popen(command, **kwargs)
def kill_process(p):
try:
# Windows
p.send_signal(signal.CTRL_BREAK_EVENT)
except AttributeError:
# Unix
os.killpg(p.pid, signal.SIGKILL)
p.communicate()
def send(p, line):
logging.log(ENGINE, "%s << %s", p.pid, line)
p.stdin.write(line + "\n")
p.stdin.flush()
def recv(p):
while True:
line = p.stdout.readline()
if line == "":
raise EOFError()
line = line.rstrip()
logging.log(ENGINE, "%s >> %s", p.pid, line)
if line:
return line
def recv_uci(p):
command_and_args = recv(p).split(None, 1)
if len(command_and_args) == 1:
return command_and_args[0], ""
elif len(command_and_args) == 2:
return command_and_args
def uci(p):
send(p, "uci")
engine_info = {}
variants = set()
while True:
command, arg = recv_uci(p)
if command == "uciok":
return engine_info, variants
elif command == "id":
name_and_value = arg.split(None, 1)
if len(name_and_value) == 2:
engine_info[name_and_value[0]] = name_and_value[1]
elif command == "option":
if arg.startswith("name UCI_Variant type combo default chess"):
for variant in arg.split(" ")[6:]:
if variant != "var":
variants.add(variant)
elif command == "Fairy-Stockfish" and " by " in arg:
# Ignore identification line
pass
else:
logging.warning("Unexpected engine response to uci: %s %s", command, arg)
def isready(p):
send(p, "isready")
while True:
command, arg = recv_uci(p)
if command == "readyok":
break
elif command == "info" and arg.startswith("string "):
pass
else:
logging.warning("Unexpected engine response to isready: %s %s", command, arg)
def setoption(p, name, value):
if value is True:
value = "true"
elif value is False:
value = "false"
elif value is None:
value = "none"
send(p, "setoption name %s value %s" % (name, value))
def go(p, position, moves, movetime=None, clock=None, depth=None, nodes=None, variant=None, chess960=False):
send(p, "position fen %s moves %s" % (position, " ".join(moves)))
builder = []
builder.append("go")
if movetime is not None:
builder.append("movetime")
builder.append(str(movetime))
if depth is not None:
builder.append("depth")
builder.append(str(depth))
if nodes is not None:
builder.append("nodes")
builder.append(str(nodes))
if clock is not None:
builder.append("wtime")
builder.append(str(clock["wtime"] * 10))
builder.append("btime")
builder.append(str(clock["btime"] * 10))
builder.append("winc")
builder.append(str(clock["inc"] * 1000))
builder.append("binc")
builder.append(str(clock["inc"] * 1000))
send(p, " ".join(builder))
info = {}
info["bestmove"] = None
while True:
command, arg = recv_uci(p)
if command == "bestmove":
bestmove = arg.split()[0]
if bestmove and bestmove != "(none)":
info["bestmove"] = bestmove
return info
elif command == "info":
arg = arg or ""
# Parse all other parameters
score_kind, score_value, lowerbound, upperbound = None, None, False, False
current_parameter = None
for token in arg.split(" "):
if current_parameter == "string":
# Everything until the end of line is a string
if "string" in info:
info["string"] += " " + token
else:
info["string"] = token
elif token == "score":
current_parameter = "score"
elif token == "pv":
current_parameter = "pv"
if info.get("multipv", 1) == 1:
info.pop("pv", None)
elif token in ["depth", "seldepth", "time", "nodes", "multipv",
"currmove", "currmovenumber",
"hashfull", "nps", "tbhits", "cpuload",
"refutation", "currline", "string"]:
current_parameter = token
info.pop(current_parameter, None)
elif current_parameter in ["depth", "seldepth", "time",
"nodes", "currmovenumber",
"hashfull", "nps", "tbhits",
"cpuload", "multipv"]:
# Integer parameters
info[current_parameter] = int(token)
elif current_parameter == "score":
# Score
if token in ["cp", "mate"]:
score_kind = token
score_value = None
elif token == "lowerbound":
lowerbound = True
elif token == "upperbound":
upperbound = True
else:
score_value = int(token)
elif current_parameter != "pv" or info.get("multipv", 1) == 1:
# Strings
if current_parameter in info:
info[current_parameter] += " " + token
else:
info[current_parameter] = token
# Set score. Prefer scores that are not just a bound
if score_kind and score_value is not None and (not (lowerbound or upperbound) or "score" not in info or info["score"].get("lowerbound") or info["score"].get("upperbound")):
info["score"] = {score_kind: score_value}
if lowerbound:
info["score"]["lowerbound"] = lowerbound
if upperbound:
info["score"]["upperbound"] = upperbound
else:
logging.warning("Unexpected engine response to go: %s %s", command, arg)
def set_variant_options(p, variant, chess960):
variant = variant.lower()
setoption(p, "Protocol", "uci")
setoption(p, "UCI_Chess960", chess960)
# eval_file = variant + ".nnue"
# if os.path.isfile(eval_file):
# setoption(p, "EvalFile", eval_file)
if variant in ["standard", "fromposition", "chess960"]:
setoption(p, "UCI_Variant", "chess")
else:
setoption(p, "UCI_Variant", variant)
class ProgressReporter(threading.Thread):
def __init__(self, queue_size, conf):
super(ProgressReporter, self).__init__()
self.http = requests.Session()
self.conf = conf
self.queue = queue.Queue(maxsize=queue_size)
self._poison_pill = object()
def send(self, job, result):
path = "analysis/%s" % job["work"]["id"]
data = json.dumps(result).encode("utf-8")
try:
self.queue.put_nowait((path, data))
except queue.Full:
logging.debug("Could not keep up with progress reports. Dropping one.")
def stop(self):
while not self.queue.empty():
self.queue.get_nowait()
self.queue.put(self._poison_pill)
def run(self):
while True:
item = self.queue.get()
if item == self._poison_pill:
return
path, data = item
try:
response = self.http.post(get_endpoint(self.conf, path),
data=data,
timeout=HTTP_TIMEOUT)
if response.status_code == 429:
logging.error("Too many requests. Suspending progress reports for 60s ...")
time.sleep(60.0)
elif response.status_code != 204:
logging.error("Expected status 204 for progress report, got %d", response.status_code)
except requests.RequestException as err:
logging.warning("Could not send progress report (%s). Continuing.", err)
class Worker(threading.Thread):
def __init__(self, conf, threads, memory, progress_reporter):
super(Worker, self).__init__()
self.conf = conf
self.threads = threads
self.memory = memory
self.progress_reporter = progress_reporter
self.alive = True
self.fatal_error = None
self.finished = threading.Event()
self.sleep = threading.Event()
self.status_lock = threading.RLock()
self.nodes = 0
self.positions = 0
self.stockfish_lock = threading.RLock()
self.stockfish = None
self.stockfish_info = None
self.job = None
self.backoff = start_backoff(self.conf)
self.http = requests.Session()
self.http.mount("http://", requests.adapters.HTTPAdapter(max_retries=1))
self.http.mount("https://", requests.adapters.HTTPAdapter(max_retries=1))
def set_name(self, name):
self.name = name
self.progress_reporter.name = "%s (P)" % (name, )
def stop(self):
with self.status_lock:
self.alive = False
self.kill_stockfish()
self.sleep.set()
def stop_soon(self):
with self.status_lock:
self.alive = False
self.sleep.set()
def is_alive(self):
with self.status_lock:
return self.alive
def run(self):
try:
while self.is_alive():
self.run_inner()
except UpdateRequired as error:
self.fatal_error = error
except Exception as error:
self.fatal_error = error
logging.exception("Fatal error in worker")
finally:
self.finished.set()
def run_inner(self):
try:
# Check if the engine is still alive and start, if necessary
self.start_stockfish()
# Do the next work unit
path, request = self.work()
except DEAD_ENGINE_ERRORS:
alive = self.is_alive()
if alive:
t = next(self.backoff)
logging.exception("Engine process has died. Backing off %0.1fs", t)
# Abort current job
self.abort_job()
if alive:
self.sleep.wait(t)
self.kill_stockfish()
return
try:
# Report result and fetch next job
response = self.http.post(get_endpoint(self.conf, path),
json=request,
timeout=HTTP_TIMEOUT)
except requests.RequestException as err:
self.job = None
t = next(self.backoff)
logging.error("Backing off %0.1fs after failed request (%s)", t, err)
self.sleep.wait(t)
else:
if response.status_code == 204:
self.job = None
t = next(self.backoff)
logging.debug("No job found. Backing off %0.1fs", t)
self.sleep.wait(t)
elif response.status_code == 202:
logging.debug("Got job: %s", response.text)
self.job = response.json()
self.backoff = start_backoff(self.conf)
elif 500 <= response.status_code <= 599:
self.job = None
t = next(self.backoff)
logging.error("Server error: HTTP %d %s. Backing off %0.1fs", response.status_code, response.reason, t)
self.sleep.wait(t)
elif 400 <= response.status_code <= 499:
self.job = None
t = next(self.backoff) + (60 if response.status_code == 429 else 0)
try:
logging.debug("Client error: HTTP %d %s: %s", response.status_code, response.reason, response.text)
error = response.json()["error"]
logging.error(error)
if "Please restart fishnet to upgrade." in error:
logging.error("Stopping worker for update.")
raise UpdateRequired()
except (KeyError, ValueError):
logging.error("Client error: HTTP %d %s. Backing off %0.1fs. Request was: %s",
response.status_code, response.reason, t, json.dumps(request))
self.sleep.wait(t)
else:
self.job = None
t = next(self.backoff)
logging.error("Unexpected HTTP status for acquire: %d", response.status_code)
self.sleep.wait(t)
def abort_job(self):
if self.job is None:
return
logging.debug("Aborting job %s", self.job["work"]["id"])
try:
response = requests.post(get_endpoint(self.conf, "abort/%s" % self.job["work"]["id"]),
data=json.dumps(self.make_request()),
timeout=HTTP_TIMEOUT)
if response.status_code == 204:
logging.info("Aborted job %s", self.job["work"]["id"])
else:
logging.error("Unexpected HTTP status for abort: %d", response.status_code)
except requests.RequestException:
logging.exception("Could not abort job. Continuing.")
self.job = None
def kill_stockfish(self):
with self.stockfish_lock:
if self.stockfish:
try:
kill_process(self.stockfish)
except OSError:
logging.exception("Failed to kill engine process.")
self.stockfish = None
def start_stockfish(self):
with self.stockfish_lock:
# Check if already running.
if self.stockfish and self.stockfish.poll() is None:
return
# Start process
self.stockfish = open_process(get_stockfish_command(self.conf, False),
get_engine_dir(self.conf))
self.stockfish_info, _ = uci(self.stockfish)
self.stockfish_info.pop("author", None)
logging.info("Started %s, threads: %s (%d), pid: %d",
self.stockfish_info.get("name", "Stockfish <?>"),
"+" * self.threads, self.threads, self.stockfish.pid)
# Prepare UCI options
self.stockfish_info["options"] = {}
self.stockfish_info["options"]["threads"] = str(self.threads)
self.stockfish_info["options"]["hash"] = str(self.memory)
# Custom options
if self.conf.has_section("Stockfish"):
for name, value in self.conf.items("Stockfish"):
self.stockfish_info["options"][name] = value
# Add .nnue file list
# self.stockfish_info["nnue"] = glob.glob("*.nnue")
# Set UCI options
for name, value in self.stockfish_info["options"].items():
setoption(self.stockfish, name, value)
isready(self.stockfish)
def make_request(self):
return {
"fishnet": {
"version": __version__,
"python": platform.python_version(),
"apikey": get_key(self.conf),
},
"stockfish": self.stockfish_info,
}
def work(self):
result = self.make_request()
if self.job and self.job["work"]["type"] == "analysis":
result = self.analysis(self.job)
return "analysis" + "/" + self.job["work"]["id"], result
elif self.job and self.job["work"]["type"] == "move":
result = self.bestmove(self.job)
return "move" + "/" + self.job["work"]["id"], result
else:
if self.job:
logging.error("Invalid job type: %s", self.job["work"]["type"])
return "acquire", result
def job_name(self, job, ply=None):
builder = []
if job.get("game_id"):
builder.append(base_url(get_endpoint(self.conf)))
builder.append(job["game_id"])
else:
builder.append(job["work"]["id"])
if ply is not None:
builder.append("#")
builder.append(str(ply))
return "".join(builder)
def bestmove(self, job):
lvl = job["work"]["level"]
variant = job.get("variant", "standard")
chess960 = job.get("chess960", False)
moves = job["moves"].split(" ")
logging.debug("Playing %s (%s) with lvl %d",
self.job_name(job), variant, lvl)
set_variant_options(self.stockfish, variant, chess960)
setoption(self.stockfish, "Skill Level", LVL_SKILL[lvl])
setoption(self.stockfish, "UCI_AnalyseMode", False)
send(self.stockfish, "ucinewgame")
isready(self.stockfish)
movetime = int(round(LVL_MOVETIMES[lvl] / (self.threads * 0.9 ** (self.threads - 1))))
start = time.time()
part = go(self.stockfish, job["position"], moves,
movetime=movetime, clock=job["work"].get("clock"),
depth=LVL_DEPTHS[lvl], variant=variant, chess960=chess960)
end = time.time()
logging.log(PROGRESS, "Played move in %s (%s) with lvl %d: %0.3fs elapsed, depth %d",
self.job_name(job), variant,
lvl, end - start, part.get("depth", 0))
self.nodes += part.get("nodes", 0)
self.positions += 1
result = self.make_request()
result["move"] = {
"bestmove": part["bestmove"],
}
return result
def analysis(self, job):
variant = job.get("variant", "standard")
chess960 = job.get("chess960", False)
moves = job["moves"].split(" ")
result = self.make_request()
result["analysis"] = [None for _ in range(len(moves) + 1)]
start = last_progress_report = time.time()
set_variant_options(self.stockfish, variant, chess960)
setoption(self.stockfish, "Skill Level", 20)
setoption(self.stockfish, "UCI_AnalyseMode", True)
send(self.stockfish, "ucinewgame")
isready(self.stockfish)
nodes = job.get("nodes") or 3500000
skip = job.get("skipPositions", [])
num_positions = 0
for ply in range(len(moves), -1, -1):
if ply in skip:
result["analysis"][ply] = {"skipped": True}
continue
if last_progress_report + PROGRESS_REPORT_INTERVAL < time.time():
if self.progress_reporter:
self.progress_reporter.send(job, result)
last_progress_report = time.time()
logging.log(PROGRESS, "Analysing %s: %s",
variant, self.job_name(job, ply))
part = go(self.stockfish, job["position"], moves[0:ply],
nodes=nodes, movetime=4000, variant=variant, chess960=chess960)
if "mate" not in part["score"] and "time" in part and part["time"] < 100:
logging.warning("Very low time reported: %d ms.", part["time"])
if "nps" in part and part["nps"] >= 100000000:
logging.warning("Dropping exorbitant nps: %d", part["nps"])
del part["nps"]
self.nodes += part.get("nodes", 0)
self.positions += 1
num_positions += 1
result["analysis"][ply] = part
end = time.time()
if num_positions:
logging.info("%s took %0.1fs (%0.2fs per position)",
self.job_name(job),
end - start, (end - start) / num_positions)
else:
logging.info("%s done (nothing to do)", self.job_name(job))
return result
def detect_cpu_capabilities():
# Detects support for popcnt and pext instructions
vendor, modern, bmi2 = "", False, False
# Run cpuid in subprocess for robustness in case of segfaults
cmd = []
cmd.append(sys.executable)
if __package__ is not None:
cmd.append("-m")
cmd.append(os.path.splitext(os.path.basename(__file__))[0])
else:
cmd.append(__file__)
cmd.append("cpuid")
process = open_process(cmd, shell=False)
# Parse output
while True:
line = process.stdout.readline()
if not line:
break
line = line.rstrip()
logging.debug("cpuid >> %s", line)
if not line:
continue
columns = line.split()
if columns[0] == "CPUID":
pass
elif len(columns) == 5 and all(all(c in string.hexdigits for c in col) for col in columns):
eax, a, b, c, d = [int(col, 16) for col in columns]
# vendor
if eax == 0:
vendor = struct.pack("III", b, d, c).decode("utf-8")
# popcnt
if eax == 1 and c & (1 << 23):
modern = True
# pext
if eax == 7 and b & (1 << 8):
bmi2 = True
else:
logging.warning("Unexpected cpuid output: %s", line)
# Done
process.communicate()
if process.returncode != 0:
logging.error("cpuid exited with status code %d", process.returncode)
return vendor, modern, bmi2
def stockfish_filename():
machine = platform.machine().lower()
vendor, modern, bmi2 = detect_cpu_capabilities()
if modern and "Intel" in vendor and bmi2:
suffix = "-bmi2"
elif modern:
suffix = "-modern"
else:
suffix = ""
if os.name == "nt":
return "stockfish-windows-%s%s.exe" % (machine, suffix)
elif os.name == "os2" or sys.platform == "darwin":
return "stockfish-osx-%s" % machine