[Bug libc/2268] New: Wrong frequency setting for ITIMER_PROF

["hjl at lucon dot org" <sourceware-bugzilla at sourceware dot org>]

sysdeps/posix/profil.c has

  timer.it_value.tv_sec = 0;
  timer.it_value.tv_usec = 1;
  timer.it_interval = timer.it_value;
  return __setitimer (ITIMER_PROF, &timer, otimer_ptr);

That sets ITIMER_PROF with 1 microsecond interval. Kernel will try to deliver a
SIGPROF signal every microsecond. Depending on other factors, a process may
get anywhere from __profile_frequency () to 1000000 SIGPROF signals per second.

-- 
           Summary: Wrong frequency setting for ITIMER_PROF
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: hjl at lucon dot org
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=2268

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