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| 28 | .TH __PPC_YIELD 3 2015-08-05 "GNU C Library" "Linux Programmer's\ | |
| 29 | Manual" | |
| 30 | .SH NAME | |
| 31 | __ppc_yield, __ppc_mdoio, __ppc_mdoom \- | |
| 32 | Hint the processor to release shared resources | |
| 33 | .SH SYNOPSIS | |
| 34 | .B #include <sys/platform/ppc.h> | |
| 35 | .sp | |
| 36 | .B void __ppc_yield(void); | |
| 37 | .br | |
| 38 | .B void __ppc_mdoio(void); | |
| 39 | .br | |
| 40 | .B void __ppc_mdoom(void); | |
| 41 | .SH DESCRIPTION | |
| 42 | The functions | |
| 43 | .BR __ppc_yield (), | |
| 44 | .BR __ppc_mdoio () | |
| 45 | and | |
| 46 | .BR __ppc_mdoom () | |
| 47 | provide hints about the usage of resources that are shared with other | |
| 48 | processors. | |
| 49 | They can be used, for example, if a program waiting on a lock intends | |
| 50 | to divert the shared resources to be used by other processors. | |
| 51 | More information is available in Power ISA 2.06b - Book II - Section | |
| 52 | 3.2. | |
| 53 | .P | |
| 54 | .BR __ppc_yield () | |
| 55 | provides a hint that performance will probably be improved if shared | |
| 56 | resources dedicated to the executing processor are released for use by | |
| 57 | other processors. | |
| 58 | .P | |
| 59 | .BR __ppc_mdoio () | |
| 60 | provides a hint that performance will probably be improved if shared | |
| 61 | resources dedicated to the executing processor are released until all | |
| 62 | outstanding storage accesses to caching-inhibited storage have been | |
| 63 | completed. | |
| 64 | .P | |
| 65 | .BR __ppc_mdoom () | |
| 66 | provides a hint that performance will probably be improved if shared | |
| 67 | resources dedicated to the executing processor are released until all | |
| 68 | outstanding storage accesses to cacheable storage for which the data | |
| 69 | is not in the cache have been completed. | |
| 70 | .SH VERSIONS | |
| 71 | GNU C Library added support for | |
| 72 | .BR __ppc_yield (), | |
| 73 | .BR __ppc_mdoio () | |
| 74 | and | |
| 75 | .BR __ppc_mdoom () | |
| 76 | in version 2.18. | |
| 77 | .SH ATTRIBUTES | |
| 78 | For an explanation of the terms used in this section, see | |
| 79 | .BR attributes (7). | |
| 80 | .ad l | |
| 81 | .TS | |
| 82 | allbox; | |
| 83 | lb lb lb | |
| 84 | l l l. | |
| 85 | Interface Attribute Value | |
| 86 | T{ | |
| 87 | .BR __ppc_yield (), | |
| 88 | .BR __ppc_mdoio (), | |
| 89 | .BR __ppc_mdoom () | |
| 90 | T} Thread safety MT-Safe | |
| 91 | .TE | |
| 92 | .ad | |
| 93 | .SH CONFORMING TO | |
| 94 | These functions are nonstandard GNU extensions. | |
| 95 | .SH SEE ALSO | |
| 96 | .BR __ppc_set_ppr_med (3) |