1 #include <sys/sysctl.h> 2 3 #include <darwintest.h> 4 #include <darwintest_perf.h> 5 6 T_GLOBAL_META( 7 T_META_NAMESPACE("xnu.arm"), 8 T_META_RADAR_COMPONENT_NAME("xnu"), 9 T_META_RADAR_COMPONENT_VERSION("arm"), 10 T_META_OWNER("jharmening") 11 ); 12 13 T_DECL(pmap_call_benchmark, "pmap call overhead benchmark") 14 { 15 int num_loops = 100000; 16 dt_stat_time_t s = dt_stat_time_create("average pmap function call overhead for %d calls", num_loops); 17 while (!dt_stat_stable(s)) { 18 dt_stat_token start = dt_stat_time_begin(s); 19 T_QUIET; T_ASSERT_POSIX_SUCCESS(sysctlbyname("kern.pmap_call_overhead_test", NULL, NULL, 20 &num_loops, sizeof(num_loops)), "invoke pmap call overhead test sysctl"); 21 dt_stat_time_end_batch(s, num_loops, start); 22 } 23 dt_stat_finalize(s); 24 } 25 26 T_DECL(pmap_page_protect_benchmark, "pmap_page_protect() overhead benchmark") 27 { 28 struct { 29 unsigned int num_loops; 30 unsigned int num_aliases; 31 } ppo_in; 32 ppo_in.num_loops = 1000; 33 uint64_t duration; 34 size_t duration_size = sizeof(duration); 35 for (ppo_in.num_aliases = 1; ppo_in.num_aliases <= 128; ppo_in.num_aliases <<= 1) { 36 T_QUIET; T_ASSERT_POSIX_SUCCESS(sysctlbyname("kern.pmap_page_protect_overhead_test", 37 &duration, &duration_size, &ppo_in, sizeof(ppo_in)), 38 "invoke pmap_page_protect() overhead test sysctl"); 39 T_LOG("%u-loop duration (in ticks) for %u aliases: %llu", ppo_in.num_loops, ppo_in.num_aliases, duration); 40 } 41 } 42