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Copy pathperf.c
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274 lines (241 loc) · 9.59 KB
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#include "aarch64.h"
#include <time.h>
#include <dispatch/dispatch.h>
#include <stdio.h>
typedef struct thread_context_t {
uint64_t spacer0[16];
void (*kernel)(uint64_t, const uint64_t*);
uint64_t count;
uint64_t args[16];
uint64_t spacer1[16];
uint64_t times[6];
uint64_t spacer2[16];
} thread_context_t;
typedef struct perfmode_t {
const char* name;
uint64_t encoding;
uint16_t op_scale;
uint8_t z_mask;
uint8_t flags;
} perfmode_t;
typedef struct perfcase_t {
const char* name;
uint64_t encoding;
uint16_t op_scale;
uint8_t z_mask;
uint8_t flags;
uint8_t opcode;
const perfmode_t* width_modes;
const perfmode_t* alu_modes;
} perfcase_t;
#define FLAG_VEC 1
#define FLAG_INT 2
#define FLAG_M2 4
static const perfmode_t fma_alu_modes[] = {
{"x*y+z", 0, 2, 0x3f, 0},
{"x*y" , 1ull << 27, 1, 0x3f, 0},
{"x+z" , 1ull << 28, 1, 0x3f, 0},
{"y+z" , 1ull << 29, 1, 0x3f, 0},
{},
};
static const perfmode_t fma16_width_modes_mat[] = {
{"f16f16", 0, 32, 0x01, 0},
{"f16f32", 1ull << 62, 32, 0x00, 0},
{},
};
static const perfmode_t fma16_width_modes_vec[] = {
{"f16f16", 0, 32, 0x3f, 0},
{},
};
static const perfmode_t fma32_width_modes[] = {
{"f16f32", 3ull << 60, 16, 0x3f, 0},
{"f32f32", 0, 16, 0x3f, 0},
{},
};
static const perfmode_t fma64_width_modes[] = {
{"f64f64", 0, 8, 0x3f, 0},
{},
};
static const perfmode_t mac16_width_modes_mat[] = {
{"i8i16" , 3ull << 60, 32, 0x01, 0},
{"i8i32" , 7ull << 60, 32, 0x00, 0},
{"i16i16", 0, 32, 0x01, 0},
{"i16i32", 4ull << 60, 32, 0x00, 0},
{},
};
static const perfmode_t mac16_width_modes_vec[] = {
{"i8i16" , 3ull << 60, 32, 0x3f, 0},
{"i16i16", 0, 32, 0x3f, 0},
{},
};
static const perfmode_t matfp_width_modes[] = {
{"bf16bf16", 0ull << 42, 32 * 32, 0x01, FLAG_M2},
{"bf16f32" , 1ull << 42, 32 * 32, 0x00, FLAG_M2},
{"f16f16" , 2ull << 42, 32 * 32, 0x01, 0},
{"f16f32" , 3ull << 42, 32 * 32, 0x00, 0},
{"f32f32" , 4ull << 42, 16 * 16, 0x03, 0},
{"f64f64" , 7ull << 42, 8 * 8, 0x07, 0},
{},
};
static const perfmode_t matfp_alu_modes[] = {
{"x*y+z", 0, 2, 0x3f, 0},
{},
};
static const perfmode_t vecfp_width_modes[] = {
{"bf16bf16", 0ull << 42, 1 * 32, 0x3f, FLAG_M2},
{"bf16f32" , 1ull << 42, 1 * 32, 0x3e, FLAG_M2},
{"f16f16" , 2ull << 42, 1 * 32, 0x3f, 0},
{"f16f32" , 3ull << 42, 1 * 32, 0x3e, 0},
{"f32f32" , 4ull << 42, 1 * 16, 0x3f, 0},
{"f64f64" , 7ull << 42, 1 * 8, 0x3f, 0},
{},
};
static const perfmode_t vecfp_alu_modes[] = {
{"x*y+z" , 0, 1 * 2, 0x3f, 0},
{"x*y+z_x2", 1ull << 31 , 2 * 2, 0x1f, FLAG_M2},
{"x*y+z_x4", (1ull << 31) | (1ull << 25), 4 * 2, 0x0f, FLAG_M2},
{},
};
static const perfmode_t matint_width_modes[] = {
{"i8i16", (8ull << 47) | ( 9ull << 42), 32 * 64, 0x00, 0},
{"i8i32", (8ull << 47) | (10ull << 42), 16 * 64, 0x00, 0},
{"i16i16", 2ull << 42, 32 * 32, 0x01, 0},
{"i16i32", 3ull << 42, 32 * 32, 0x00, 0},
{},
};
static const perfmode_t matint_alu_modes[] = {
{"x*y+z", 0, 2, 0x3f, 0},
{},
};
static const perfmode_t vecint_width_modes[] = {
{"i8i16", (11ull << 42), 64, 0x3e, 0},
{"i8i32", (10ull << 42), 64, 0x3c, 0},
{"i16i16", 2ull << 42, 32, 0x3f, 0},
{"i16i32", 3ull << 42, 32, 0x3e, 0},
{},
};
static const perfmode_t vecint_alu_modes[] = {
{"x*y+z" , 0, 1 * 2, 0x3f, 0},
{"x*y+z_x2", 1ull << 31 , 2 * 2, 0x1f, FLAG_M2},
{"x*y+z_x4", (1ull << 31) | (1ull << 25), 4 * 2, 0x0f, FLAG_M2},
{},
};
static const perfcase_t perfcases[] = {
{"fma16_mat", 0, 32, 0x3f, 0, 15, fma16_width_modes_mat, fma_alu_modes},
{"fma32_mat", 0, 16, 0x03, 0, 12, fma32_width_modes, fma_alu_modes},
{"fma64_mat", 0, 8, 0x07, 0, 10, fma64_width_modes, fma_alu_modes},
{"fma16_vec", 1ull << 63, 1, 0x3f, FLAG_VEC, 15, fma16_width_modes_vec, fma_alu_modes},
{"fma32_vec", 1ull << 63, 1, 0x3f, FLAG_VEC, 12, fma32_width_modes, fma_alu_modes},
{"fma64_vec", 1ull << 63, 1, 0x3f, FLAG_VEC, 10, fma64_width_modes, fma_alu_modes},
{"mac16_mat", 0, 32, 0x01, FLAG_INT, 14, mac16_width_modes_mat, fma_alu_modes},
{"mac16_vec", 1ull << 63, 1, 0x3f, FLAG_INT | FLAG_VEC, 14, mac16_width_modes_vec, fma_alu_modes},
{"matfp", 0, 1, 0x07, 0, 21, matfp_width_modes, matfp_alu_modes},
{"vecfp", 0, 1, 0x3f, FLAG_VEC, 19, vecfp_width_modes, vecfp_alu_modes},
{"matint", 0, 1, 0x03, FLAG_INT, 20, matint_width_modes, matint_alu_modes},
{"vecint", 0, 1, 0x3f, FLAG_INT | FLAG_VEC, 18, vecint_width_modes, vecint_alu_modes},
{},
};
#define barrier __asm volatile("dsb ish" : : : "memory")
static uint64_t now(clockid_t which) {
barrier;
uint64_t result = clock_gettime_nsec_np(which);
barrier;
return result;
}
static void thread_func(void* ctx_, size_t rank) {
thread_context_t* ctx = (thread_context_t*)ctx_;
AMX_SET();
uint64_t t0 = now(CLOCK_THREAD_CPUTIME_ID);
ctx->kernel(ctx->count, ctx->args);
uint64_t t1 = now(CLOCK_THREAD_CPUTIME_ID);
AMX_CLR();
ctx->times[rank] = (t1 - t0);
}
typedef void (*perf_kernel_t)(uint64_t, const uint64_t*);
perf_kernel_t get_perf_kernel(uint32_t op, uint32_t nregs);
static uint64_t add_one_using_bitmask_hi(uint64_t x, uint64_t bitmask) {
for (uint64_t bit = 1ull << 63; bit; bit >>= 1) {
if (bitmask & bit) {
x ^= bit;
if (x & bit) {
break;
}
}
}
return x;
}
static uint64_t add_one_using_bitmask_lo(uint64_t x, uint64_t bitmask) {
for (uint64_t bit = 1; bit; bit <<= 1) {
if (bitmask & bit) {
x ^= bit;
if (x & bit) {
break;
}
}
}
return x;
}
#define PTR_ROW_FLAGS(ptr, row, flags) (((uint64_t)&*(ptr)) + (((uint64_t)((row) + (flags) * 64)) << 56))
static uint8_t detect_hardware_m2_flag() {
__attribute__((aligned(256))) uint8_t buf[256];
buf[128] = 1;
AMX_SET(); // Set x[0:8] to zero
AMX_LDX(PTR_ROW_FLAGS(buf, 16, 1)); // On M1: copy buf[0:128] to x[0:2], on M2: copy buf[0:256] to x[0:4]
AMX_STX(PTR_ROW_FLAGS(buf, 2, 0)); // Copy x[2] to buf[0:64]
AMX_CLR();
return buf[0] == 1 ? FLAG_M2 : 0;
}
int main() {
uint8_t allowed_flags = FLAG_VEC | FLAG_INT | detect_hardware_m2_flag();
printf("test_name,z_spacing,num_z,bytes_per_z,num_threads,insn_total,ops_total,ns_elapsed,ops_unit\n");
thread_context_t ctx;
for (const perfcase_t* perfcase = perfcases; perfcase->name; ++perfcase) {
for (const perfmode_t* width_mode = perfcase->width_modes; width_mode->name; ++width_mode) {
for (const perfmode_t* alu_mode = perfcase->alu_modes; alu_mode->name; ++alu_mode) {
uint8_t flags = perfcase->flags | width_mode->flags | alu_mode->flags;
if (flags & ~allowed_flags) goto next_mode;
uint8_t z_mask = perfcase->z_mask & width_mode->z_mask & alu_mode->z_mask;
uint32_t max_num_z = 1u << __builtin_popcount(z_mask);
uint32_t bytes_per_z = 4096 / max_num_z;
if (max_num_z > 16) {
max_num_z = 16;
}
uint32_t ops_per_insn = (uint32_t)perfcase->op_scale * (uint32_t)width_mode->op_scale * (uint32_t)alu_mode->op_scale;
uint64_t op_count_target = 4096ull * 4096ull * 5760ull;
if (!(flags & FLAG_VEC)) {
op_count_target *= 20ull;
}
if (ops_per_insn > 64) {
op_count_target *= 2;
}
for (uint32_t n_z = 1; n_z <= max_num_z; ++n_z) {
ctx.kernel = get_perf_kernel(perfcase->opcode, n_z);
for (uint32_t far_z = 0; far_z <= 1; ++far_z) {
uint64_t encoding = perfcase->encoding ^ width_mode->encoding ^ alu_mode->encoding;
for (uint32_t z = 0; z < n_z; ++z) {
ctx.args[z] = encoding;
encoding = (far_z ? add_one_using_bitmask_hi : add_one_using_bitmask_lo)(encoding, ((uint64_t)z_mask) << 20);
}
for (uint32_t n_threads = 1; n_threads <= 6; ++n_threads) {
ctx.count = op_count_target / (ops_per_insn * n_threads * n_z);
ctx.count = (ctx.count + 4) & ~(uint64_t)7;
uint64_t t0 = now(CLOCK_REALTIME);
dispatch_apply_f(n_threads, DISPATCH_APPLY_AUTO, (void*)&ctx, thread_func);
uint64_t t1 = now(CLOCK_REALTIME);
uint64_t wall_elapsed = (t1 - t0);
uint64_t insn_total = n_threads * ctx.count * n_z;
printf("%s_%s_%s,%s,%u,%u,%u,%llu,%llu,%llu,%s\n",
perfcase->name, width_mode->name, alu_mode->name,
far_z ? "far" : "near", (unsigned)n_z, (unsigned)bytes_per_z, (unsigned)n_threads,
(long long unsigned)insn_total, (long long unsigned)(insn_total * ops_per_insn), (long long unsigned)wall_elapsed,
flags & FLAG_INT ? "GOPS" : "GFLOPS");
fflush(stdout);
}
}
}
next_mode:;
}
}
}
return 0;
}