tests/processor_info.c

   1 #include <darwintest.h>
   2 #include <inttypes.h>
   3 #if __arm64__
   4 #include <mach/arm/processor_info.h>
   5 #endif /* __arm64__ */
   6 #include <mach/mach.h>
   7 #include <stdlib.h>
   8 #include <unistd.h>
   9
  10 T_GLOBAL_META(T_META_ASROOT(true),
  11     T_META_RUN_CONCURRENTLY(true));
  12
  13 T_DECL(processor_cpu_stat64,
  14     "ensure 64-bit processor statistics are reported correctly",
  15     T_META_NAMESPACE("xnu.arm"))
  16 {
  17 #if !__arm64__
  18         T_SKIP("processor statistics only available on ARM");
  19 #else /* !__arm64__ */
  20         host_t host = mach_host_self();
  21         host_t priv_port = MACH_PORT_NULL;
  22
  23         kern_return_t kr = host_get_host_priv_port(host, &priv_port);
  24         T_QUIET;
  25         T_ASSERT_MACH_SUCCESS(kr, "host_get_host_priv_port");
  26         T_QUIET;
  27         T_ASSERT_NE(priv_port, MACH_PORT_NULL, "valid host priv port");
  28
  29         processor_port_array_t cpu_ports = NULL;
  30         mach_msg_type_number_t cpu_count = 0;
  31         kr = host_processors(priv_port, &cpu_ports, &cpu_count);
  32         T_QUIET;
  33         T_ASSERT_MACH_SUCCESS(kr, "host_processors");
  34         T_QUIET;
  35         T_ASSERT_NOTNULL(cpu_ports, "valid processor port array");
  36         T_QUIET;
  37         T_ASSERT_GT(cpu_count, (mach_msg_type_number_t)0,
  38             "non-zero CPU count");
  39
  40         T_LOG("found %d CPUs", cpu_count);
  41
  42         struct processor_cpu_stat64 *prestats = calloc(cpu_count,
  43             sizeof(*prestats));
  44         T_WITH_ERRNO;
  45         T_QUIET;
  46         T_ASSERT_NOTNULL(prestats, "allocate space for stats (pre)");
  47         memset(prestats, 0xff, cpu_count * sizeof(*prestats));
  48
  49         for (int i = 0; i < (int)cpu_count; i++) {
  50                 mach_msg_type_number_t info_count = PROCESSOR_CPU_STAT64_COUNT;
  51                 kr = processor_info(cpu_ports[i], PROCESSOR_CPU_STAT64, &host,
  52                     (processor_info_t)&prestats[i], &info_count);
  53                 T_ASSERT_MACH_SUCCESS(kr,
  54                     "processor_info(%d, PROCESSOR_CPU_STAT64, ...)", i);
  55
  56                 T_QUIET;
  57                 T_ASSERT_EQ(info_count, PROCESSOR_CPU_STAT64_COUNT,
  58                     "received enough CPU statistics");
  59         }
  60
  61         sleep(1);
  62
  63         struct processor_cpu_stat64 *poststats = calloc(cpu_count - 1,
  64             sizeof(*poststats));
  65         T_WITH_ERRNO;
  66         T_QUIET;
  67         T_ASSERT_NOTNULL(poststats, "allocate space for stats (post)");
  68
  69         for (int i = 0; i < (int)cpu_count; i++) {
  70                 mach_msg_type_number_t info_count = PROCESSOR_CPU_STAT64_COUNT;
  71                 kr = processor_info(cpu_ports[i], PROCESSOR_CPU_STAT64, &host,
  72                     (processor_info_t)&poststats[i], &info_count);
  73                 T_ASSERT_MACH_SUCCESS(kr,
  74                     "processor_info(%d, PROCESSOR_CPU_STAT64, ...)", i);
  75
  76                 T_QUIET;
  77                 T_ASSERT_EQ(info_count, PROCESSOR_CPU_STAT64_COUNT,
  78                     "received enough CPU statistics");
  79         }
  80
  81         for (int i = 0; i < (int)cpu_count; i++) {
  82 #define CHECK_STAT_FIELD(field) \
  83                 T_EXPECT_GE(poststats[i].field, prestats[i].field, \
  84                 "CPU %d's " #field " is monotonically increasing (+%" PRIu64 \
  85                 ")", i, poststats[i].field - prestats[i].field)
  86
  87                 CHECK_STAT_FIELD(irq_ex_cnt);
  88                 CHECK_STAT_FIELD(ipi_cnt);
  89                 CHECK_STAT_FIELD(timer_cnt);
  90                 CHECK_STAT_FIELD(undef_ex_cnt);
  91                 CHECK_STAT_FIELD(unaligned_cnt);
  92                 CHECK_STAT_FIELD(vfp_cnt);
  93                 CHECK_STAT_FIELD(vfp_shortv_cnt);
  94                 CHECK_STAT_FIELD(data_ex_cnt);
  95                 CHECK_STAT_FIELD(instr_ex_cnt);
  96                 CHECK_STAT_FIELD(pmi_cnt);
  97
  98 #undef CHECK_STAT_FIELD
  99         }
 100
 101         free(prestats);
 102         free(poststats);
 103 #endif /* __arm64__ */
 104 }