man3/__ppc_yield.3

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  25 .TH __PPC_YIELD 3 2015-08-05 "GNU C Library" "Linux Programmer's\
  26 Manual"
  27 .SH NAME
  28 __ppc_yield, __ppc_mdoio, __ppc_mdoom \-
  29 Hint the processor to release shared resources
  30 .SH SYNOPSIS
  31 .B #include <sys/platform/ppc.h>
  32 .sp
  33 .B void __ppc_yield(void);
  34 .br
  35 .B void __ppc_mdoio(void);
  36 .br
  37 .B void __ppc_mdoom(void);
  38 .SH DESCRIPTION
  39 These functions
  40 provide hints about the usage of resources that are shared with other
  41 processors on the Power architecture.
  42 They can be used, for example, if a program waiting on a lock intends
  43 to divert the shared resources to be used by other processors.
  44 .P
  45 .BR __ppc_yield ()
  46 provides a hint that performance will probably be improved if shared
  47 resources dedicated to the executing processor are released for use by
  48 other processors.
  49 .P
  50 .BR __ppc_mdoio ()
  51 provides a hint that performance will probably be improved if shared
  52 resources dedicated to the executing processor are released until all
  53 outstanding storage accesses to caching-inhibited storage have been
  54 completed.
  55 .P
  56 .BR __ppc_mdoom ()
  57 provides a hint that performance will probably be improved if shared
  58 resources dedicated to the executing processor are released until all
  59 outstanding storage accesses to cacheable storage for which the data
  60 is not in the cache have been completed.
  61 .SH VERSIONS
  62 These functions first appeared in glibc in version 2.18.
  63 .SH ATTRIBUTES
  64 For an explanation of the terms used in this section, see
  65 .BR attributes (7).
  66 .ad l
  67 .TS
  68 allbox;
  69 lbw29 lb lb
  70 l l l.
  71 Interface       Attribute       Value
  72 T{
  73 .BR __ppc_yield (),
  74 .BR __ppc_mdoio (),
  75 .BR __ppc_mdoom ()
  76 T}      Thread safety   MT-Safe
  77 .TE
  78 .ad
  79 .SH CONFORMING TO
  80 These functions are nonstandard GNU extensions.
  81 .SH SEE ALSO
  82 .BR __ppc_set_ppr_med (3)
  83
  84 .IR "Power ISA, Book\ II - Section\ 3.2 (""or"" architecture)"