11e6d34e1c
Only spawns 1 thread that does a busy wait up to a counter. Other cores do not issue any instructions after the scheduling prologue.
39 lines
1.0 KiB
C++
39 lines
1.0 KiB
C++
#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 "include/gemmini.h"
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#include "gemmini_mmio.h"
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#define NUM_CLUSTERS 1
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#define NUM_THREADS_IN_CLUSTER 256
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#define HW_TID() ({uint32_t gtid; asm volatile ("csrr %0, mhartid" : "=r" (gtid)); gtid;})
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void kernel_body(int task_id, kernel_arg_t *__UNIFORM__ arg) {
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constexpr uint32_t timer = 50000;
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uint32_t counter = 0;
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while ((counter++) < timer) {
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asm("");
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}
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// to prevent optimize-out
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// reinterpret_cast<uint32_t *>(arg->addr_c)[0] = counter;
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vx_tmc(0);
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}
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int main() {
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kernel_arg_t *arg = (kernel_arg_t *)KERNEL_ARG_DEV_MEM_ADDR;
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// const uint32_t num_threads_in_cluster = NUM_THREADS_IN_CLUSTER;
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// const uint32_t grid_size = num_threads_in_cluster * NUM_CLUSTERS;
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const uint32_t grid_size = 1;
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#ifdef RADIANCE
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vx_spawn_tasks_cluster(grid_size, (vx_spawn_tasks_cb)kernel_body, arg);
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#else
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vx_spawn_tasks_contiguous(grid_size, (vx_spawn_tasks_cb)kernel_body, arg);
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#endif
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return 0;
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}
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