from __future__ import division import numpy as np import loopy as lp import pyopencl as cl from pyopencl.tools import pytest_generate_tests_for_pyopencl \ as pytest_generate_tests __all__ = ["pytest_generate_tests", "cl" # 'cl.create_some_context' ] def test_owed_barriers(ctx_factory): ctx = ctx_factory() knl = lp.make_kernel(ctx.devices[0], "{[i]: 0<=i<100}", [ "[i:l.0] z[i] = a[i]" ], [lp.GlobalArg("a", np.float32, shape=(100,))] ) kernel_gen = lp.generate_loop_schedules(knl) kernel_gen = lp.check_kernels(kernel_gen) for gen_knl in kernel_gen: compiled = lp.CompiledKernel(ctx, gen_knl) print compiled.code def test_wg_too_small(ctx_factory): ctx = ctx_factory() knl = lp.make_kernel(ctx.devices[0], "{[i]: 0<=i<100}", [ "[i:l.0] z[i] = a[i]" ], [lp.GlobalArg("a", np.float32, shape=(100,))], local_sizes={0: 16}) kernel_gen = lp.generate_loop_schedules(knl) kernel_gen = lp.check_kernels(kernel_gen) for gen_knl in kernel_gen: try: lp.CompiledKernel(ctx, gen_knl) except RuntimeError, e: assert "implemented and desired" in str(e) pass # expected! else: assert False # expecting an error def test_multi_cse(ctx_factory): ctx = ctx_factory() knl = lp.make_kernel(ctx.devices[0], "{[i]: 0<=i<100}", [ "[i] z[i] = a[i] + a[i]**2" ], [lp.GlobalArg("a", np.float32, shape=(100,))], local_sizes={0: 16}) knl = lp.split_dimension(knl, "i", 16, inner_tag="l.0") knl = lp.add_prefetch(knl, "a", []) kernel_gen = lp.generate_loop_schedules(knl) kernel_gen = lp.check_kernels(kernel_gen) for gen_knl in kernel_gen: compiled = lp.CompiledKernel(ctx, gen_knl) print compiled.code def test_stencil(ctx_factory): ctx = ctx_factory() knl = lp.make_kernel(ctx.devices[0], "{[i,j]: 0<= i,j < 32}", [ "[i] z[i,j] = -2*a[i,j]" " + a[i,j-1]" " + a[i,j+1]" " + a[i-1,j]" " + a[i+1,j]" ], [ lp.GlobalArg("a", np.float32, shape=(32,32,)) ]) def variant_1(knl): knl = lp.add_prefetch(knl, "a", [0, 1]) return knl def variant_2(knl): knl = lp.split_dimension(knl, "i", 16, outer_tag="g.1", inner_tag="l.1") knl = lp.split_dimension(knl, "j", 16, outer_tag="g.0", inner_tag="l.0") knl = lp.add_prefetch(knl, "a", ["i_inner", "j_inner"]) return knl #for variant in [variant_1, variant_2]: for variant in [variant_2]: kernel_gen = lp.generate_loop_schedules(variant(knl), loop_priority=["i_outer", "i_inner_0", "j_0"]) kernel_gen = lp.check_kernels(kernel_gen) for knl in kernel_gen: print lp.generate_code(knl) def test_eq_constraint(ctx_factory): ctx = ctx_factory() knl = lp.make_kernel(ctx.devices[0], "{[i,j]: 0<= i,j < 32}", [ "a[i] = b[i]" ], [ lp.GlobalArg("a", np.float32, shape=(1000,)), lp.GlobalArg("b", np.float32, shape=(1000,)) ]) knl = lp.split_dimension(knl, "i", 16, outer_tag="g.0") knl = lp.split_dimension(knl, "i_inner", 16, outer_tag=None, inner_tag="l.0") kernel_gen = lp.generate_loop_schedules(knl) kernel_gen = lp.check_kernels(kernel_gen) for knl in kernel_gen: print lp.generate_code(knl) def test_argmax(ctx_factory): dtype = np.dtype(np.float32) ctx = ctx_factory() queue = cl.CommandQueue(ctx) order = "C" n = 10000 knl = lp.make_kernel(ctx.devices[0], "{[i]: 0<=i<%d}" % n, [ "<> result = argmax(i, fabs(a[i]))", "max_idx = result.index", "max_val = result.value", ], [ lp.GlobalArg("a", dtype, shape=(n,), order=order), lp.GlobalArg("max_idx", np.int32, shape=(), order=order), lp.GlobalArg("max_val", dtype, shape=(), order=order), ]) a = np.random.randn(10000).astype(dtype) cknl = lp.CompiledKernel(ctx, knl) evt, (max_idx, max_val) = cknl(queue, a=a) assert max_val == np.max(np.abs(a)) assert max_idx == np.where(np.abs(a)==max_val)[-1] def make_random_value(): from random import randrange, uniform v = randrange(3) if v == 0: while True: z = randrange(-1000, 1000) if z: return z elif v == 1: return uniform(-10, 10) else: return uniform(-10, 10) + 1j*uniform(-10, 10) def make_random_expression(var_values, size): from random import randrange import pymbolic.primitives as p v = randrange(1500) size[0] += 1 if v < 500 and size[0] < 40: term_count = randrange(2, 5) if randrange(2) < 1: cls = p.Sum else: cls = p.Product return cls(tuple( make_random_expression(var_values, size) for i in range(term_count))) elif v < 750: return make_random_value() elif v < 1000: var_name = "var_%d" % len(var_values) assert var_name not in var_values var_values[var_name] = make_random_value() return p.Variable(var_name) elif v < 1250: return make_random_expression(var_values, size) - make_random_expression(var_values, size) elif v < 1500: return make_random_expression(var_values, size) / make_random_expression(var_values, size) def generate_random_fuzz_examples(): for i in xrange(20): size = [0] var_values = {} expr = make_random_expression(var_values, size) yield expr, var_values def test_fuzz_code_generator(ctx_factory): ctx = ctx_factory() queue = cl.CommandQueue(ctx) from expr_fuzz import get_fuzz_examples for expr, var_values in generate_random_fuzz_examples(): #for expr, var_values in get_fuzz_examples(): from pymbolic import evaluate true_value = evaluate(expr, var_values) def get_dtype(x): if isinstance(x, complex): return np.complex128 else: return np.float64 knl = lp.make_kernel(ctx.devices[0], "{ : }", [lp.Instruction(None, "value", expr)], [lp.GlobalArg("value", np.complex128, shape=())] + [ lp.ScalarArg(name, get_dtype(val)) for name, val in var_values.iteritems() ]) ck = lp.CompiledKernel(ctx, knl) evt, (lp_value,) = ck(queue, **var_values) err = abs(true_value-lp_value)/abs(true_value) if abs(err) > 1e-10: print "---------------------------------------------------------------------" print "WRONG: rel error=%g" % err print "true=%r" % true_value print "loopy=%r" % lp_value print "---------------------------------------------------------------------" print ck.code print "---------------------------------------------------------------------" print var_values print "---------------------------------------------------------------------" print repr(expr) print "---------------------------------------------------------------------" print expr print "---------------------------------------------------------------------" 1/0 if __name__ == "__main__": import sys if len(sys.argv) > 1: exec(sys.argv[1]) else: from py.test.cmdline import main main([__file__])