tests/mpsc.c

   1 /*
   2  * mpsc: test the MPSC interface
   3  */
   4
   5 #ifdef T_NAMESPACE
   6 #undef T_NAMESPACE
   7 #endif
   8
   9 #include <darwintest.h>
  10 #include <sys/sysctl.h>
  11
  12 T_GLOBAL_META(T_META_NAMESPACE("xnu.mpsc"),
  13     T_META_RUN_CONCURRENTLY(true));
  14
  15 T_DECL(pingpong, "mpsc_pingpong", T_META_ASROOT(true))
  16 {
  17         uint64_t count = 100 * 1000, nsecs = 0;
  18         size_t nlen = sizeof(nsecs);
  19         int error;
  20
  21         error = sysctlbyname("kern.mpsc_test_pingpong", &nsecs, &nlen,
  22             &count, sizeof(count));
  23         T_ASSERT_POSIX_SUCCESS(error, "sysctlbyname");
  24         T_LOG("%lld asyncs in %lld ns (%g us/async)", count, nsecs,
  25             (nsecs / 1e3) / count);
  26 }