__ppc_yield, __ppc_mdoio, __ppc_mdoom - Hint the processor to release shared
resources
#include <sys/platform/ppc.h>
void __ppc_yield(void);
void __ppc_mdoio(void);
void __ppc_mdoom(void);
These functions provide hints about the usage of resources that are shared with
other processors on the Power architecture. They can be used, for example, if
a program waiting on a lock intends to divert the shared resources to be used
by other processors.
__ppc_yield() provides a hint that performance will probably be improved
if shared resources dedicated to the executing processor are released for use
by other processors.
__ppc_mdoio() provides a hint that performance will probably be improved
if shared resources dedicated to the executing processor are released until
all outstanding storage accesses to caching-inhibited storage have been
completed.
__ppc_mdoom() provides a hint that performance will probably be improved
if shared resources dedicated to the executing processor are released until
all outstanding storage accesses to cacheable storage for which the data is
not in the cache have been completed.
These functions first appeared in glibc in version 2.18.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| __ppc_yield (), __ppc_mdoio (), __ppc_mdoom () |
Thread safety |
MT-Safe |
These functions are nonstandard GNU extensions.
__ppc_set_ppr_med(3)
Power ISA, Book II - Section 3.2 ("or"
architecture)