1 // SPDX-License-Identifier: GPL-2.0
13 #include <time.h>
33 	 * The test can still run even if hardware does not support GICv3, as it  in arch_setup_vm()
57 /* How many host loops to run by default (one KVM_GET_DIRTY_LOG for each loop)*/
72 	struct kvm_vcpu *vcpu = vcpu_args->vcpu;  in vcpu_worker()
73 	int vcpu_idx = vcpu_args->vcpu_idx;  in vcpu_worker()
75 	struct kvm_run *run;  in vcpu_worker()  local
82 	run = vcpu->run;  in vcpu_worker()
94 			    exit_reason_str(run->exit_reason));  in vcpu_worker()
102 			pages_count += vcpu_args->pages;  in vcpu_worker()
104 			pr_debug("vCPU %d iteration %d dirty memory time: %ld.%.9lds\n",  in vcpu_worker()
108 			pr_debug("vCPU %d iteration %d populate memory time: %ld.%.9lds\n",  in vcpu_worker()
156 				 p->slots, p->backing_src,  in run_test()
157 				 p->partition_vcpu_memory_access);  in run_test()
159 	pr_info("Random seed: %u\n", p->random_seed);  in run_test()
160 	memstress_set_random_seed(vm, p->random_seed);  in run_test()
161 	memstress_set_write_percent(vm, p->write_percent);  in run_test()
163 	guest_num_pages = (nr_vcpus * guest_percpu_mem_size) >> vm->page_shift;  in run_test()
166 	pages_per_slot = host_num_pages / p->slots;  in run_test()
168 	bitmaps = memstress_alloc_bitmaps(p->slots, pages_per_slot);  in run_test()
182 		vcpu_last_completed_iteration[i] = -1;  in run_test()
187 	 * page. The prevents expensive copy-on-write faults from  in run_test()
196 	pr_debug("Starting iteration %d - Populating\n", iteration);  in run_test()
204 	pr_info("Populate memory time: %ld.%.9lds\n",  in run_test()
209 	memstress_enable_dirty_logging(vm, p->slots);  in run_test()
211 	pr_info("Enabling dirty logging time: %ld.%.9lds\n\n",  in run_test()
214 	memstress_set_write_percent(vm, p->write_percent);  in run_test()
215 	memstress_set_random_access(vm, p->random_access);  in run_test()
217 	while (iteration < p->iterations) {  in run_test()
234 		pr_info("Iteration %d dirty memory time: %ld.%.9lds\n",  in run_test()
238 		memstress_get_dirty_log(vm, bitmaps, p->slots);  in run_test()
242 		pr_info("Iteration %d get dirty log time: %ld.%.9lds\n",  in run_test()
247 			memstress_clear_dirty_log(vm, bitmaps, p->slots,  in run_test()
252 			pr_info("Iteration %d clear dirty log time: %ld.%.9lds\n",  in run_test()
258 	 * Run vCPUs while dirty logging is being disabled to stress disabling  in run_test()
259 	 * in terms of both performance and correctness.  Opt-in via command  in run_test()
260 	 * line as this significantly increases time to disable dirty logging.  in run_test()
263 		WRITE_ONCE(iteration, -1);  in run_test()
267 	memstress_disable_dirty_logging(vm, p->slots);  in run_test()
269 	pr_info("Disabling dirty logging time: %ld.%.9lds\n",  in run_test()
280 	avg = timespec_div(get_dirty_log_total, p->iterations);  in run_test()
282 		p->iterations, get_dirty_log_total.tv_sec,  in run_test()
286 		avg = timespec_div(clear_dirty_log_total, p->iterations);  in run_test()
288 			p->iterations, clear_dirty_log_total.tv_sec,  in run_test()
292 	memstress_free_bitmaps(bitmaps, p->slots);  in run_test()
300 	printf("usage: %s [-h] [-a] [-i iterations] [-p offset] [-g] "  in help()
301 	       "[-m mode] [-n] [-b vcpu bytes] [-v vcpus] [-o] [-r random seed ] [-s mem type]"  in help()
302 	       "[-x memslots] [-w percentage] [-c physical cpus to run test on]\n", name);  in help()
304 	printf(" -a: access memory randomly rather than in order.\n");  in help()
305 	printf(" -i: specify iteration counts (default: %"PRIu64")\n",  in help()
307 	printf(" -g: Do not enable KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2. This\n"  in help()
313 	printf(" -p: specify guest physical test memory offset\n"  in help()
316 	printf(" -n: Run the vCPUs in nested mode (L2)\n");  in help()
317 	printf(" -e: Run vCPUs while dirty logging is being disabled.  This\n"  in help()
320 	printf(" -b: specify the size of the memory region which should be\n"  in help()
323 	printf(" -v: specify the number of vCPUs to run.\n");  in help()
324 	printf(" -o: Overlap guest memory accesses instead of partitioning\n"  in help()
326 	printf(" -r: specify the starting random seed.\n");  in help()
327 	backing_src_help("-s");  in help()
328 	printf(" -x: Split the memory region into this number of memslots.\n"  in help()
330 	printf(" -w: specify the percentage of pages which should be written to\n"  in help()
331 	       "     as an integer from 0-100 inclusive. This is probabilistic,\n"  in help()
332 	       "     so -w X means each page has an X%% chance of writing\n"  in help()
333 	       "     and a (100-X)%% chance of reading.\n"  in help()
361 	while ((opt = getopt(argc, argv, "ab:c:eghi:m:nop:r:s:v:x:w:")) != -1) {  in main()