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Ping: [PATCH] PowerPC - Add a faster way to read the Time Baseregister
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On Fri, May 11, 2012 at 07:10:37PM -0300, Tulio Magno Quites Machado Filho wrote:
> Add function __ppc_get_timebase() to directly read the Time Base register.
> This is required for applications that measure time at high frequencies
> with high precision that can't afford a syscall.
>
> 2012-05-11 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
>
> [BZ #13743]
> * sysdeps/powerpc/sys/platform/ppc.h: New file for PowerPC features.
> * sysdeps/powerpc/Makefile (tests): Add test-gettimebase.
> (sysdep_headers): Include sys/platform/ppc.h.
> * sysdeps/powerpc/test-gettimebase.c: Test for
> __ppc_get_timebase() to catch future ISA opcode/insn changes.
> * manual/Makefile (appendices): Include platform.texi.
> * manual/contrib.texi (Contributors): Update @node pointers.
> * manual/maint.texi (Maintenance): Likewise.
> (Platform): New node.
> * manual/platform.texi: New file. Document the new features.
>
> ---
>
> In this version I applied all the comments from Roland and Ryan.
> The most important, IMO, is the suggestion to remove the typedef
> __ppc_timebase. It's only using uint64_t now.
>
> Roland,
>
> I modified the menu entry in manual/maint.texi, but it isn't equal to
> what you suggested. Is that OK?
>
> ---
> manual/Makefile | 3 +-
> manual/contrib.texi | 2 +-
> manual/maint.texi | 82 +++++++++++++++++++++++++++++++++++-
> manual/platform.texi | 32 ++++++++++++++
> sysdeps/powerpc/Makefile | 5 ++
> sysdeps/powerpc/sys/platform/ppc.h | 50 ++++++++++++++++++++++
> sysdeps/powerpc/test-gettimebase.c | 47 ++++++++++++++++++++
> 7 files changed, 218 insertions(+), 3 deletions(-)
> create mode 100644 manual/platform.texi
> create mode 100644 sysdeps/powerpc/sys/platform/ppc.h
> create mode 100644 sysdeps/powerpc/test-gettimebase.c
--
Tulio Magno