515 lines
23 KiB
C++
515 lines
23 KiB
C++
#define RISCV_CUSTOM3 0x7B
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#include <stdint.h>
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#include <vx_intrinsics.h>
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#include <vx_print.h>
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#include <vx_spawn.h>
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#include "common.h"
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#include "util.hpp"
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#define DOUBLE_BUFFER 1
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#undef ELEM_PER_THREAD
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#define ELEM_PER_THREAD (WMITER * WNITER * ((TCM * TCN) / NUM_LANES) / (DOUBLE_BUFFER ? 2 : 1))
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// FIXME: NUM_THREADS and NUM_WARPS hardcoded
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#if ((BM * BN / ELEM_PER_THREAD) > (CORES_PER_CLUSTER * 8 * 8))
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#error "threadblock size too big for cluster"
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#endif
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inline void global_dmem_load(const uint32_t dim_n, const uint32_t dim_k,
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const uint32_t k, const float *A, const float *B,
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volatile float *local_a, volatile float *local_b,
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const uint32_t tid_in_threadblock,
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const uint32_t threadblock_id_x,
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const uint32_t threadblock_id_y) {
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const uint32_t local_a_row = tid_in_threadblock / BK;
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const uint32_t local_a_col = tid_in_threadblock % BK;
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const uint32_t local_as_row = tid_in_threadblock / BM;
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const uint32_t local_as_col = tid_in_threadblock % BM;
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const uint32_t local_b_row = tid_in_threadblock / BN;
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const uint32_t local_b_col = tid_in_threadblock % BN;
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constexpr uint32_t threads_in_warpgroup =
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(BM * BN) / ELEM_PER_THREAD / (DOUBLE_BUFFER ? 2 : 1); // FIXME
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// Data move from GMEM to SMEM
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//
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// Make sure global offset values for A and B are contiguous between
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// neighboring threads to ensure GMEM coalescing.
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//
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// TODO: Sharedmem swizzling is important here
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if constexpr (!TRANSPOSE_AT_PRODUCE) {
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// if !TRANSPOSE_AT_PRODUCE, we only support coalesced GMEM loads
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static_assert(TRANSPOSE_AT_PRODUCE || GMEM_COALESCED_A);
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const uint32_t global_a_row = BM * threadblock_id_y + local_a_row;
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// number of rows a full TB can read at a time
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constexpr uint32_t row_stride_a = threads_in_warpgroup / BK;
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const float *global_a = A + dim_k * global_a_row + (k + local_a_col);
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volatile float *local_a_tmp = local_a + BK * local_a_row + local_a_col;
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static_assert(
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row_stride_a * 8 <= BM,
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"manual loop unrolling condition not met; consider increasing BM");
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static_assert(
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(BM % (row_stride_a * 8)) == 0,
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"manual loop unrolling condition not met; BM should be power-of-two");
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#pragma GCC unroll 1
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for (uint32_t local_row_offset = 0; local_row_offset < BM;
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local_row_offset += row_stride_a * 8) {
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row + local_row_offset) + (k + local_a_col);
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// local_a[BK * (local_a_row + local_row_offset) + local_a_col] =
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// A[global_a_offset];
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//
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// *local_a_tmp = *global_a;
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// global_a += dim_k * row_stride_a;
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// local_a_tmp += BK * row_stride_a;
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asm volatile ("flw ft0, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft1, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft2, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft3, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft4, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft5, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft6, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft7, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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// stride along columns
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// bank conflicts
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asm volatile ("fsw ft0, %0(%1)" :: "i"(BK * row_stride_a * 0 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft1, %0(%1)" :: "i"(BK * row_stride_a * 1 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft2, %0(%1)" :: "i"(BK * row_stride_a * 2 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft3, %0(%1)" :: "i"(BK * row_stride_a * 3 * sizeof(float)), "r"(local_a_tmp));
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local_a_tmp += BK * row_stride_a * 4;
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asm volatile ("fsw ft4, %0(%1)" :: "i"(BK * row_stride_a * 0 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft5, %0(%1)" :: "i"(BK * row_stride_a * 1 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft6, %0(%1)" :: "i"(BK * row_stride_a * 2 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft7, %0(%1)" :: "i"(BK * row_stride_a * 3 * sizeof(float)), "r"(local_a_tmp));
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local_a_tmp += BK * row_stride_a * 4;
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}
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} else {
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if constexpr (!GMEM_COALESCED_A) {
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constexpr uint32_t row_stride_as = threads_in_warpgroup / BM;
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const uint32_t global_a_row = BM * threadblock_id_y + local_as_col;
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// NOTE that GMEM reads are transposed
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const float *global_a = A + dim_k * global_a_row + (k + local_as_row);
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volatile float *local_a_tmp = local_a + BM * local_as_row + local_as_col;
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static_assert(
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row_stride_as * 8 <= BK,
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"manual loop unrolling condition not met; consider increasing BK");
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static_assert(
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(BK % (row_stride_as * 8)) == 0,
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"manual loop unrolling condition not met; BK should be power-of-two");
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#pragma GCC unroll 1
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for (uint32_t local_row_offset = 0; local_row_offset < BK;
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local_row_offset += row_stride_as * 8) {
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// @perf: bank conflicts here
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row) + (k + local_as_row + local_row_offset);
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// FIXME experimenting with global coalescing
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row + local_row_offset) + (k + local_as_col);
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// local_a[BM * (local_as_row + local_row_offset) + local_as_col] =
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// A[global_a_offset];
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// *local_a_tmp = *global_a;
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asm volatile ("flw ft0, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft1, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft2, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft3, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft4, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft5, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft6, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft7, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("fsw ft0, %0(%1)" :: "i"(BM * row_stride_as * 0 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft1, %0(%1)" :: "i"(BM * row_stride_as * 1 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft2, %0(%1)" :: "i"(BM * row_stride_as * 2 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft3, %0(%1)" :: "i"(BM * row_stride_as * 3 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft4, %0(%1)" :: "i"(BM * row_stride_as * 4 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft5, %0(%1)" :: "i"(BM * row_stride_as * 5 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft6, %0(%1)" :: "i"(BM * row_stride_as * 6 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft7, %0(%1)" :: "i"(BM * row_stride_as * 7 * sizeof(float)), "r"(local_a_tmp));
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local_a_tmp += BM * row_stride_as * 8;
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}
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} else {
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constexpr uint32_t row_stride_a = threads_in_warpgroup / BK;
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const uint32_t global_a_row = BM * threadblock_id_y + local_a_row;
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const float *global_a = A + dim_k * global_a_row + (k + local_a_col);
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// NOTE that SMEM writes are transposed
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volatile float *local_a_tmp = local_a + BM * local_a_col + local_a_row;
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static_assert(
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row_stride_a * 8 <= BM,
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"manual loop unrolling condition not met; consider increasing BM");
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static_assert(
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(BM % (row_stride_a * 8)) == 0,
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"manual loop unrolling condition not met; BM should be power-of-two");
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#pragma GCC unroll 1
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for (uint32_t local_row_offset = 0; local_row_offset < BM;
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local_row_offset += row_stride_a * 8) {
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row + local_row_offset) + (k + local_a_col);
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// NOTE that SMEM writes are transposed
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// local_a[BM * (local_a_col) + local_a_row + local_row_offset] =
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// A[global_a_offset];
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asm volatile ("flw ft0, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft1, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft2, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft3, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft4, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft5, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft6, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft7, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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// stride along columns
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// bank conflicts
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asm volatile ("fsw ft0, %0(%1)" :: "i"(row_stride_a * 0 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft1, %0(%1)" :: "i"(row_stride_a * 1 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft2, %0(%1)" :: "i"(row_stride_a * 2 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft3, %0(%1)" :: "i"(row_stride_a * 3 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft4, %0(%1)" :: "i"(row_stride_a * 4 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft5, %0(%1)" :: "i"(row_stride_a * 5 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft6, %0(%1)" :: "i"(row_stride_a * 6 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft7, %0(%1)" :: "i"(row_stride_a * 7 * sizeof(float)), "r"(local_a_tmp));
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local_a_tmp += row_stride_a * 8;
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}
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}
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}
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constexpr uint32_t row_stride_b = threads_in_warpgroup / BN;
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const uint32_t global_b_col = BN * threadblock_id_x + local_b_col;
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const float *global_b = B + dim_n * (k + local_b_row) + global_b_col;
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volatile float *local_b_tmp = local_b + BN * local_b_row + local_b_col;
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static_assert(
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row_stride_b * 8 <= BK,
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"manual loop unrolling condition not met; consider increasing BK");
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static_assert(
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(BK % (row_stride_b * 8)) == 0,
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"manual loop unrolling condition not met; BK should be power-of-two");
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#pragma GCC unroll 1
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for (uint32_t load_offset = 0; load_offset < BK;
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load_offset += row_stride_b * 8) {
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// const uint32_t global_b_offset =
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// dim_n * (k + local_b_row + load_offset) + global_b_col;
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// local_b[BN * (local_b_row + load_offset) + local_b_col] =
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// B[global_b_offset];
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// *local_b_tmp = *global_b;
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// global_b += dim_n * row_stride_b;
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// local_b_tmp += BN * row_stride_b;
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asm volatile ("flw ft0, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft1, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft2, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft3, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft4, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft5, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft6, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft7, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("fsw ft0, %0(%1)" :: "i"(BN * row_stride_b * 0 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft1, %0(%1)" :: "i"(BN * row_stride_b * 1 * sizeof(float)), "r"(local_b_tmp));
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local_b_tmp += BN * row_stride_b * 2;
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asm volatile ("fsw ft2, %0(%1)" :: "i"(BN * row_stride_b * 0 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft3, %0(%1)" :: "i"(BN * row_stride_b * 1 * sizeof(float)), "r"(local_b_tmp));
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local_b_tmp += BN * row_stride_b * 2;
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asm volatile ("fsw ft4, %0(%1)" :: "i"(BN * row_stride_b * 0 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft5, %0(%1)" :: "i"(BN * row_stride_b * 1 * sizeof(float)), "r"(local_b_tmp));
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local_b_tmp += BN * row_stride_b * 2;
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asm volatile ("fsw ft6, %0(%1)" :: "i"(BN * row_stride_b * 0 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft7, %0(%1)" :: "i"(BN * row_stride_b * 1 * sizeof(float)), "r"(local_b_tmp));
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local_b_tmp += BN * row_stride_b * 2;
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}
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}
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inline void thread_block_gemm(kernel_arg_t *__UNIFORM__ arg,
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const uint32_t tid_in_threadblock,
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const uint32_t threads_per_threadblock,
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const uint32_t threadblock_dim_y,
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/*const uint32_t threadblock_id_x,
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const uint32_t threadblock_id_y,*/
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const uint32_t threadblocks_per_cluster,
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const uint32_t threadblock_id_in_cluster,
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float *sharedmem_per_threadblock) {
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const float *A = (const float *)arg->addr_a;
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const float *B = (const float *)arg->addr_b;
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float *C = (float *)arg->addr_c;
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const uint32_t dim_m = arg->dim_m;
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const uint32_t dim_n = arg->dim_n;
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const uint32_t dim_k = arg->dim_k;
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const uint32_t local_a_row = tid_in_threadblock / BK;
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const uint32_t local_a_col = tid_in_threadblock % BK;
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const uint32_t local_as_row = tid_in_threadblock / BM;
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const uint32_t local_as_col = tid_in_threadblock % BM;
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const uint32_t local_b_row = tid_in_threadblock / BN;
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const uint32_t local_b_col = tid_in_threadblock % BN;
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const uint32_t threads_per_warpgroup = threads_per_threadblock / (DOUBLE_BUFFER ? 2 : 1);
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const uint32_t warpgroup_id = tid_in_threadblock / threads_per_warpgroup;
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const uint32_t tid_in_warpgroup = tid_in_threadblock % threads_per_warpgroup; // FIXME
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const uint32_t warp_in_warpgroup = tid_in_warpgroup / NUM_LANES;
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// FIXME: warp_row / BN should be warp-specialized?
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const uint32_t warp_row = warp_in_warpgroup / (BN / WN);
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const uint32_t warp_col = warp_in_warpgroup % (BN / WN);
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const uint32_t tid_in_warp = tid_in_threadblock % NUM_LANES;
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volatile float *local_a = sharedmem_per_threadblock;
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// const size_t local_a_elems = threadblock_dim_x * threadblock_dim_y;
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constexpr size_t local_a_elems = (BM * BK);
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volatile float *local_b = sharedmem_per_threadblock + local_a_elems;
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constexpr size_t local_b_elems = (BK * BN);
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volatile float *local_a_buf = local_b + local_b_elems;
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volatile float *local_b_buf = local_a_buf + local_a_elems;
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// divide rows (M) by the number of threadblocks
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// FIXME: doesn't work with multiple clusters
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const uint32_t dim_m_range = (dim_m / threadblocks_per_cluster);
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const uint32_t dim_m_start = dim_m_range * threadblock_id_in_cluster;
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const uint32_t block_m_start = dim_m_start / BM;
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const uint32_t block_m_end = (dim_m_start + dim_m_range) / BM;
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if (warpgroup_id == 0) {
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// producer code: GMEM->SMEM data movement
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#pragma GCC unroll 1
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for (uint32_t block_m = block_m_start; block_m < block_m_end; block_m++) {
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#pragma GCC unroll 1
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for (uint32_t block_n = 0; (block_n * BN) < dim_n; block_n++) {
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if constexpr (DOUBLE_BUFFER) {
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// initiate software pipeline
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global_dmem_load(dim_n, dim_k, 0 /*k*/, A, B, local_a, local_b,
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tid_in_warpgroup, block_n, block_m);
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threadblock_barrier(threadblock_id_in_cluster, threadblock_dim_y);
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}
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// NOTE: this *should* be signed integer to trigger arithmetic
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// right-shift
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int32_t k_index = 0;
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#pragma GCC unroll 1
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for (uint32_t k = 0; k < (dim_k) - BK; k += BK) {
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volatile float *local_a_produce;
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volatile float *local_b_produce;
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if constexpr (DOUBLE_BUFFER) {
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const uint32_t mask_odd = (k_index & 1) << 31 >> 31;
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const uint32_t mask_even = ((k_index & 1) ^ 1) << 31 >> 31;
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// local_a_produce = (k_index % 2) ? local_a : local_a_buf;
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// local_b_produce = (k_index % 2) ? local_b : local_b_buf;
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local_a_produce = reinterpret_cast<volatile float *>(
|
|
(mask_odd & reinterpret_cast<uintmax_t>(local_a)) |
|
|
(mask_even & reinterpret_cast<uintmax_t>(local_a_buf)));
|
|
local_b_produce = reinterpret_cast<volatile float *>(
|
|
(mask_odd & reinterpret_cast<uintmax_t>(local_b)) |
|
|
(mask_even & reinterpret_cast<uintmax_t>(local_b_buf)));
|
|
} else {
|
|
local_a_produce = local_a;
|
|
local_b_produce = local_b;
|
|
}
|
|
k_index++;
|
|
|
|
global_dmem_load(dim_n, dim_k, k + BK /*runahead*/, A, B,
|
|
local_a_produce, local_b_produce, tid_in_warpgroup,
|
|
block_n, block_m);
|
|
|
|
threadblock_barrier(threadblock_id_in_cluster, threadblock_dim_y);
|
|
}
|
|
|
|
// sync with final consumer stage in the k-loop
|
|
threadblock_barrier(threadblock_id_in_cluster, threadblock_dim_y);
|
|
}
|
|
}
|
|
} else {
|
|
// consumer code: SMEM->RF and compute
|
|
|
|
#pragma GCC unroll 1
|
|
for (uint32_t block_m = block_m_start; block_m < block_m_end; block_m++) {
|
|
#pragma GCC unroll 1
|
|
for (uint32_t block_n = 0; (block_n * BN) < dim_n; block_n++) {
|
|
// clear out C
|
|
initialize_C(0);
|
|
initialize_C(1);
|
|
|
|
// sync with initial producer stage in the k-loop
|
|
threadblock_barrier(threadblock_id_in_cluster, threadblock_dim_y);
|
|
|
|
// NOTE: this *should* be signed integer to trigger arithmetic
|
|
// right-shift
|
|
int32_t k_index = 0;
|
|
#pragma GCC unroll 1
|
|
for (uint32_t k = 0; k < (dim_k); k += BK) {
|
|
const volatile float *local_a_consume;
|
|
const volatile float *local_b_consume;
|
|
if constexpr (DOUBLE_BUFFER) {
|
|
// local_a_consume = (k_index % 2) ? local_a_buf : local_a;
|
|
// local_b_consume = (k_index % 2) ? local_b_buf : local_b;
|
|
// FIXME: swap multiply with bitshifts
|
|
const uint32_t mask_odd = (k_index & 1) << 31 >> 31;
|
|
const uint32_t mask_even = ((k_index & 1) ^ 1) << 31 >> 31;
|
|
local_a_consume = reinterpret_cast<volatile float *>(
|
|
(mask_odd & reinterpret_cast<uintmax_t>(local_a_buf)) |
|
|
(mask_even & reinterpret_cast<uintmax_t>(local_a)));
|
|
local_b_consume = reinterpret_cast<volatile float *>(
|
|
(mask_odd & reinterpret_cast<uintmax_t>(local_b_buf)) |
|
|
(mask_even & reinterpret_cast<uintmax_t>(local_b)));
|
|
} else {
|
|
local_a_consume = local_a;
|
|
local_b_consume = local_b;
|
|
}
|
|
k_index++;
|
|
|
|
// @perf: this loop spills to stack a lot because of all the flws in
|
|
#pragma GCC unroll 1
|
|
for (int i = 0; i < BK_LOOP; i++) {
|
|
#pragma GCC unroll 2
|
|
for (uint32_t local_k = 0; local_k < BK; local_k += TCK) {
|
|
#pragma GCC unroll 2
|
|
for (int wn_iter = 0; wn_iter < WNITER; wn_iter++) {
|
|
// SMEM -> RF
|
|
vx_wmma_load_b(local_b_consume, local_k, warp_col, wn_iter,
|
|
tid_in_warp);
|
|
#pragma GCC unroll 2
|
|
for (int wm_iter = 0; wm_iter < WMITER; wm_iter++) {
|
|
// SMEM -> RF
|
|
vx_wmma_load_a(local_a_consume, local_k, warp_row, wm_iter,
|
|
tid_in_warp);
|
|
// perform mma
|
|
vx_wmma(wm_iter);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
threadblock_barrier(threadblock_id_in_cluster, threadblock_dim_y);
|
|
}
|
|
|
|
#pragma GCC unroll 1
|
|
for (int wm_iter = 0; wm_iter < WMITER; wm_iter++) {
|
|
#pragma GCC unroll 1
|
|
for (int wn_iter = 0; wn_iter < WNITER; wn_iter++) {
|
|
if (warpgroup_id == 1) {
|
|
write_results(tid_in_warp, warp_col, warp_row, wn_iter, wm_iter,
|
|
dim_n, C, block_n, block_m);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void kernel_body(int task_id, kernel_arg_t *__UNIFORM__ arg) {
|
|
// @perf: All threads are running these compute whose result is mostly same
|
|
// across the threadblock
|
|
|
|
#ifdef RADIANCE
|
|
constexpr uint32_t cores_per_cluster = CORES_PER_CLUSTER;
|
|
#else
|
|
constexpr uint32_t cores_per_cluster = 1;
|
|
#endif
|
|
|
|
uint32_t threads_per_threadblock = (BM * BN) / (ELEM_PER_THREAD);
|
|
const uint32_t hw_threads_per_cluster =
|
|
cores_per_cluster * vx_num_threads() * vx_num_warps();
|
|
// cap maximum threadblock size to # of HW threads in cluster, to prevent
|
|
// multiple "wave" invocations which slows down the kernel
|
|
if (threads_per_threadblock > hw_threads_per_cluster) {
|
|
threads_per_threadblock = hw_threads_per_cluster;
|
|
}
|
|
const uint32_t threadblocks_per_cluster =
|
|
hw_threads_per_cluster / threads_per_threadblock;
|
|
|
|
const uint32_t threadblock_dim_y = vx_num_warps() / threadblocks_per_cluster;
|
|
const int threadblock_id = task_id / threads_per_threadblock;
|
|
const int threadblock_id_in_cluster =
|
|
threadblock_id % threadblocks_per_cluster;
|
|
const int tid_in_threadblock = task_id % threads_per_threadblock;
|
|
|
|
const uint32_t dim_m = arg->dim_m;
|
|
const uint32_t dim_n = arg->dim_n;
|
|
const uint32_t dim_n_in_blocks = dim_n / BN;
|
|
const int threadblock_id_x = threadblock_id % dim_n_in_blocks;
|
|
const int threadblock_id_y = threadblock_id / dim_n_in_blocks;
|
|
const uint32_t problem_size = (dim_m * dim_n) / (ELEM_PER_THREAD);
|
|
const uint32_t num_threadblocks = problem_size / threads_per_threadblock;
|
|
|
|
// "static" shared memory allocation. This would determine threadblock
|
|
// occupancy of a single cluster
|
|
float *sharedmem_per_threadblock =
|
|
(float *)DEV_SMEM_START_ADDR +
|
|
2 /*double-buffering*/ * (2 * BM * BK) * threadblock_id_in_cluster;
|
|
|
|
thread_block_gemm(arg, tid_in_threadblock, threads_per_threadblock,
|
|
threadblock_dim_y,
|
|
/*threadblock_id_x, threadblock_id_y,*/
|
|
threadblocks_per_cluster,
|
|
// threadblock_id,
|
|
threadblock_id_in_cluster,
|
|
sharedmem_per_threadblock);
|
|
}
|
|
|
|
int main() {
|
|
kernel_arg_t *arg = (kernel_arg_t *)KERNEL_ARG_DEV_MEM_ADDR;
|
|
|
|
const uint32_t problem_size = (arg->dim_m * arg->dim_n) / (ELEM_PER_THREAD);
|
|
const uint32_t hw_threads_per_cluster =
|
|
CORES_PER_CLUSTER * vx_num_threads() * vx_num_warps();
|
|
// prevent launching more threads than the necessary problem size
|
|
// TODO: this does not take into account multiple clusters
|
|
const uint32_t grid_size = (problem_size > hw_threads_per_cluster)
|
|
? hw_threads_per_cluster
|
|
: problem_size;
|
|
|
|
#ifdef RADIANCE
|
|
vx_spawn_tasks_cluster(grid_size, (vx_spawn_tasks_cb)kernel_body, arg);
|
|
#else
|
|
// NOTE: This kernel assumes contiguous thread scheduling for efficient shared
|
|
// memory allocation, and therefore does not work with original vx_spawn_tasks
|
|
vx_spawn_tasks_contiguous(grid_size, (vx_spawn_tasks_cb)kernel_body, arg);
|
|
#endif
|
|
return 0;
|
|
}
|