PT 2.0 Benchmarks

1-pw_op_fusion.py

import torch
import torch._inductor.config
import time

torch._inductor.config.triton.cudagraphs = False
torch.set_float32_matmul_precision('high')

def bench(f, name=None, iters=100, warmup=5, display=True, profile=False):
    for _ in range(warmup):
        f()
    if profile:
        with torch.profiler.profile() as prof:
            f()
        prof.export_chrome_trace(f"{name if name is not None else 'trace'}.json")

    torch.cuda.synchronize()
    begin = time.time()
    for _ in range(iters):
        f()
    torch.cuda.synchronize()
    us_per_iter = (time.time()-begin)*1e6/iters
    if name is None:
        res = us_per_iter
    else:
        res= f"{name}: {us_per_iter}us"
    if display:
        print(res)
    return res

def f1(a, b, c, d):
    a = a.relu()
    b = b.tanh()
    e = a * b
    f = (c + 2).cos()
    return (e + f) * d
inp = [torch.randn(2**24, device='cuda') for _ in range(4)]

f = f1
nf = torch.compile(f)
bench(lambda: f(*inp), name="eager")
bench(lambda: nf(*inp), name="PT 2.0")

2-overhead.py

import torch
from torch.nn import *
torch.set_float32_matmul_precision('high')

def bench(f, name=None, iters=100, warmup=5, display=True, profile=False):
    import time
    for _ in range(warmup):
        f()
    if profile:
        with torch.profiler.profile() as prof:
            f()
        prof.export_chrome_trace(f"{name if name is not None else 'trace'}.json")

    torch.cuda.synchronize()
    begin = time.time()
    for _ in range(iters):
        f()
    torch.cuda.synchronize()
    us_per_iter = (time.time()-begin)*1e6/iters
    if name is None:
        res = us_per_iter
    else:
        res= f"{name}: {us_per_iter:.2f}us"
    if display:
        print(res)
    return res


import torchvision.models as models

mod = models.resnet18().eval().cuda()
opt_mod = torch.compile(mod, mode="reduce-overhead")

inp = torch.randn(1, 3, 224, 224).cuda()


with torch.no_grad():
    # Eager: 1938.18us
    bench(lambda: mod(inp), "Eager")
    # torch.compile (default): 953.96us
    # torch.compile (reduce-overhead): 744.02us
    bench(lambda: opt_mod(inp), "torch.compile (reduce-overhead)")

3-matmul-bench.py

import torch
from triton.testing import do_bench

def get_flops(N, get_kernels=False):
    A = torch.randn(N, N, device='cuda', dtype=torch.float16)
    B = torch.randn(N, N, device='cuda', dtype=torch.float16)

    def f():
        return torch.mm(A, B)

    if get_kernels:
        with torch.profiler.profile() as prof:
            f()

        for e in prof.events():
            if "gemm" in e.name or "triton" in e.name or "gemv" in e.name:
                print(f"{N}: {e.name}")
                timer = e.cuda_time/1e3
    timer = do_bench(f)[0]
    iters_per_second = 1e3/timer
    flops = A.shape[0] * A.shape[1] * B.shape[1] * 2
    flops_achieved = iters_per_second * flops/1e12
    print(f"{N}: {flops_achieved:.2f}TF/s")

for N in range(1, 4096):
    get_flops(N)

3-tiling.py

import torch
torch.set_float32_matmul_precision('high')
import torch._inductor.config
torch._inductor.config.debug = True


def bench(f, name=None, iters=100, warmup=5, display=True, profile=False):
    import time
    for _ in range(warmup):
        f()
    if profile:
        with torch.profiler.profile() as prof:
            f()
        prof.export_chrome_trace(f"{name if name is not None else 'trace'}.json")

    torch.cuda.synchronize()
    begin = time.time()
    for _ in range(iters):
        f()
    torch.cuda.synchronize()
    us_per_iter = (time.time()-begin)*1e6/iters

    if name is None:
        res = us_per_iter
    else:
        res= f"{name}: {us_per_iter:.3f}us"

    if display:
        print(res)
    return res

def get_bandwidth(name, f):
    iters_per_second = 1e6/bench(f, display=False)
    bytes_accessed = N**2*4*3
    print(f"{name}: {iters_per_second * bytes_accessed/1e9:.2f}GB")

N = 2**14

def f(a, b):
    return a + b
A = torch.randn(N, N, device='cuda')
B = torch.randn(N, N, device='cuda')

# eager: 1389.84GB
get_bandwidth("eager", lambda: f(A, B))
# torch.compile: 1388.19GB
get_bandwidth("torch.compile", lambda: torch.compile(f)(A, B))

def f2(a, b):
    return a + b.t()
A = torch.randn(N, N, device='cuda')
B = torch.randn(N, N, device='cuda')

# eager: 904.01GB
get_bandwidth("eager", lambda: f2(A, B))
# torch.compile: 1334.89GB
get_bandwidth("torch.compile", lambda: torch.compile(f2)(A, B))

4-matmul-bench.py

import torch
from triton.testing import do_bench

def get_flops(N, get_kernels=False):
    A = torch.randn(N, N, device='cuda', dtype=torch.float16)
    B = torch.randn(N, N, device='cuda', dtype=torch.float16)

    def f():
        return torch.mm(A, B)

    if get_kernels:
        with torch.profiler.profile() as prof:
            f()

        for e in prof.events():
            if "gemm" in e.name or "triton" in e.name or "gemv" in e.name:
                print(f"{N}: {e.name}")
                timer = e.cuda_time/1e3
    timer = do_bench(f)[0]
    iters_per_second = 1e3/timer
    flops = A.shape[0] * A.shape[1] * B.shape[1] * 2
    flops_achieved = iters_per_second * flops/1e12
    print(f"{N}: {flops_achieved:.2f}TF/s")

for N in range(1, 4096):
    get_flops(N)