On Wed, Aug 29, 2012 at 01:56:05PM -0400, Hans-Peter Nilsson wrote: > On Wed, 29 Aug 2012, Segher Boessenkool wrote: > > On some systems the timebase runs at a rather low frequency, say 20MHz. > > This test will spuriously fail there. Waste a million CPU cycles before > > reading TB the second time? > > Waste said million cycles portably by calling sched_yield()? > (Available only on POSIX systems. :)
Well only for a test environment. You don't want to call sched_yield in the normal case, since the apps that do this many millions of times need this to be as a fast as possible. -- Michael Meissner, IBM 5 Technology Place Drive, M/S 2757, Westford, MA 01886-3141, USA meiss...@linux.vnet.ibm.com fax +1 (978) 399-6899
