mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
dae60aa248
Then inside, split packages/lkmc into kernel_modules and userland, to keep userland out of the kernel_modules parent path, which makes no sense. Copy built modules and userland to the output rootfs overlay. Document Linux distro tradeoffs.
43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#gdb-step-debug-multicore */
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#define _GNU_SOURCE
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#include <assert.h>
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#include <sched.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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void print_affinity() {
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cpu_set_t mask;
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long nproc, i;
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if (sched_getaffinity(0, sizeof(cpu_set_t), &mask) == -1) {
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perror("sched_getaffinity");
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assert(false);
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} else {
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nproc = sysconf(_SC_NPROCESSORS_ONLN);
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printf("sched_getaffinity = ");
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for (i = 0; i < nproc; i++) {
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printf("%d ", CPU_ISSET(i, &mask));
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}
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printf("\n");
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}
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}
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int main(void) {
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cpu_set_t mask;
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print_affinity();
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printf("sched_getcpu = %d\n", sched_getcpu());
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CPU_ZERO(&mask);
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CPU_SET(0, &mask);
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if (sched_setaffinity(0, sizeof(cpu_set_t), &mask) == -1) {
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perror("sched_setaffinity");
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assert(false);
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}
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print_affinity();
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printf("sched_getcpu = %d\n", sched_getcpu());
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return EXIT_SUCCESS;
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}
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