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#!/usr/bin/env python3
# SPDX-License-Identifier: BSD-3-Clause
#
# client_test.py - external producer/consumer check for the CUBB v1 transport.
#
# Simulates what vgsp.ko will do: write a CUBB job record into the job file,
# wait for the daemon to update the done file with the matching seq, then
# verify the fields. Uses a fake guest-RAM file (never /dev/shm/vgpu-guest-ram).
#
# python3 client_test.py
import array
import os
import struct
import subprocess
import sys
import time
HERE = os.path.dirname(os.path.abspath(__file__))
BIN = os.path.join(HERE, "cuda_bridge")
DIR = os.environ.get("CUBB_TEST_DIR", "/tmp/opencode/cuda-bridge-test")
RAM = os.path.join(DIR, "transport-ram.bin")
JOB = os.path.join(DIR, "transport-job.bin")
DONE = os.path.join(DIR, "transport-done.bin")
LOG = os.path.join(DIR, "transport-daemon.log")
N = 1 << 20
MASK = 0xFFFFFFFF
JOB_FMT = "<4sIQ10I9Q"
DONE_FMT = "<4sIQIIQQII64sQII"
assert struct.calcsize(JOB_FMT) == 128
assert struct.calcsize(DONE_FMT) == 128
def job_record(seq, opcode, n, mail_out_gpa=0, a_gpa=0, b_gpa=0, c_gpa=0):
buffer_bytes = n * 4
mail_bytes = n if opcode == 1 else 0
return struct.pack(
JOB_FMT,
b"CUBB",
1,
seq,
opcode,
(n + 255) // 256 if opcode != 1 else 1,
1,
1,
256,
1,
1,
0,
n,
0,
mail_out_gpa,
mail_bytes,
a_gpa,
buffer_bytes,
b_gpa,
buffer_bytes,
c_gpa,
buffer_bytes,
0,
)
def parse_done(data):
(
magic,
version,
seq,
status,
bad_count,
checksum_bits,
kernel_ns,
name_len,
opcode,
name,
host_ns,
err_code,
_reserved,
) = struct.unpack(DONE_FMT, data)
checksum = struct.unpack("<d", struct.pack("<Q", checksum_bits))[0]
return {
"magic": magic,
"version": version,
"seq": seq,
"status": status,
"bad_count": bad_count,
"checksum": checksum,
"kernel_ns": kernel_ns,
"device": name.split(b"\0", 1)[0].decode(),
"opcode": opcode,
"host_ns": host_ns,
"err_code": err_code,
}
def fill_ram():
fd = os.open(RAM, os.O_RDWR | os.O_CREAT)
os.ftruncate(fd, 4 << 30)
a = array.array("f", [(i % 1000) * 0.5 for i in range(N)])
b = array.array("f", [(i % 997) * 0.25 for i in range(N)])
os.pwrite(fd, a.tobytes(), 0x10000000)
os.pwrite(fd, b.tobytes(), 0x20000000)
os.close(fd)
def write_job(rec):
tmp = JOB + ".tmp"
with open(tmp, "wb") as fh:
fh.write(rec)
fh.flush()
os.fsync(fh.fileno())
os.replace(tmp, JOB)
def wait_done(seq, timeout=60.0):
t0 = time.time()
while time.time() - t0 < timeout:
try:
with open(DONE, "rb") as fh:
data = fh.read(128)
except FileNotFoundError:
data = b""
if len(data) == 128 and data[:4] == b"CUBD":
if struct.unpack_from("<Q", data, 8)[0] == seq:
return data
time.sleep(0.02)
return None
def main():
os.makedirs(DIR, exist_ok=True)
fill_ram()
for path in (JOB, DONE):
try:
os.unlink(path)
except FileNotFoundError:
pass
with open(LOG, "wb") as log:
daemon = subprocess.Popen(
[BIN, "--job", JOB, "--done", DONE, "--ram", RAM, "--poll-ms", "5"],
stdout=log,
stderr=subprocess.STDOUT,
)
fails = 0
try:
time.sleep(0.5)
write_job(job_record(1000, 2, N, a_gpa=0x10000000, b_gpa=0x20000000,
c_gpa=0x30000000))
data = wait_done(1000)
if data is None:
print("TRANSPORT seq=1000 vadd: no done record")
fails += 1
else:
d = parse_done(data)
with open(RAM, "rb") as fh:
fh.seek(0x30000000)
c = array.array("f")
c.frombytes(fh.read(N * 4))
bad = sum(
1
for i in range(N)
if c[i] != (i % 1000) * 0.5 + (i % 997) * 0.25
)
checksum = sum(c)
ok = (
d["status"] == 0
and d["bad_count"] == 0
and bad == 0
and abs(checksum - 392344090.5) < 1e-4
and d["kernel_ns"] > 0
)
if not ok:
fails += 1
print(
"TRANSPORT seq=%d op=%d status=%d bad=%d kernel_ns=%d "
"checksum=%.6f device=\"%s\" file_bad=%d %s"
% (
d["seq"],
d["opcode"],
d["status"],
d["bad_count"],
d["kernel_ns"],
d["checksum"],
d["device"],
bad,
"PASS" if ok else "FAIL",
)
)
write_job(job_record(1001, 1, len(b"the little gpu man says you've got mail"),
mail_out_gpa=0x40000000))
data = wait_done(1001)
want = b"the little gpu man says you've got mail"
if data is None:
print("TRANSPORT seq=1001 mail: no done record")
fails += 1
else:
d = parse_done(data)
with open(RAM, "rb") as fh:
fh.seek(0x40000000)
got = fh.read(len(want))
ok = d["status"] == 0 and d["bad_count"] == 0 and got == want
if not ok:
fails += 1
print(
"TRANSPORT seq=%d op=%d status=%d bad=%d mail=\"%s\" %s"
% (
d["seq"],
d["opcode"],
d["status"],
d["bad_count"],
got.decode(),
"PASS" if ok else "FAIL",
)
)
finally:
daemon.terminate()
try:
daemon.wait(timeout=10)
except subprocess.TimeoutExpired:
daemon.kill()
daemon.wait()
print("TRANSPORT %s" % ("PASS" if fails == 0 else "FAIL"))
return 0 if fails == 0 else 1
if __name__ == "__main__":
sys.exit(main())
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