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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788// SPDX-License-Identifier: GPL-2.0-only/* * Dhrystone benchmark test module * * Copyright (C) 2022 Glider bv */
#include "dhry.h"
#include <linux/kernel.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/smp.h>
#define DHRY_VAX 1757
static int dhry_run_set(const char *val, const struct kernel_param *kp);static const struct kernel_param_ops run_ops = { .flags = KERNEL_PARAM_OPS_FL_NOARG, .set = dhry_run_set,};static bool dhry_run;module_param_cb(run, &run_ops, &dhry_run, 0200);MODULE_PARM_DESC(run, "Run the test (default: false)");
static int iterations = -1;module_param(iterations, int, 0644);MODULE_PARM_DESC(iterations, "Number of iterations through the benchmark (default: auto)");
static void dhry_benchmark(void){ unsigned int cpu = get_cpu(); int i, n;
if (iterations > 0) { n = dhry(iterations); goto report; }
for (i = DHRY_VAX; i > 0; i <<= 1) { n = dhry(i); if (n != -EAGAIN) break; }
report: put_cpu(); if (n >= 0) pr_info("CPU%u: Dhrystones per Second: %d (%d DMIPS)\n", cpu, n, n / DHRY_VAX); else if (n == -EAGAIN) pr_err("Please increase the number of iterations\n"); else pr_err("Dhrystone benchmark failed error %pe\n", ERR_PTR(n));}
static int dhry_run_set(const char *val, const struct kernel_param *kp){ int ret;
if (val) { ret = param_set_bool(val, kp); if (ret) return ret; } else { dhry_run = true; }
if (dhry_run && system_state == SYSTEM_RUNNING) dhry_benchmark();
return 0;}
static int __init dhry_init(void){ if (dhry_run) dhry_benchmark();
return 0;}module_init(dhry_init);
MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");MODULE_DESCRIPTION("Dhrystone benchmark test module");MODULE_LICENSE("GPL");