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| author | Zdenek Dvorak <dvorakz@suse.cz> | 2006-11-12 20:17:02 +0100 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2006-11-12 19:17:02 +0000 |
| commit | 47eb5b329bf8e6ab2e939a4cedf5533d02a6c7f1 (patch) | |
| tree | 3dfa782960185e45d610e396ad0016d74f247a11 /gcc/doc | |
| parent | 015e23f4005b00afaf87c90ef67db48b364fe70e (diff) | |
| download | gcc-47eb5b329bf8e6ab2e939a4cedf5533d02a6c7f1.tar.gz | |
params.c (set_param_value): Initialize the "set" field.
* params.c (set_param_value): Initialize the "set" field.
* params.h (struct param_info): Add "set" field.
(PARAM_SET_P): New macro.
(PREFETCH_LATENCY, SIMULTANEOUS_PREFETCHES, L1_CACHE_SIZE,
L1_CACHE_LINE_SIZE): New macros.
* toplev.c (DEFPARAM): Initialize the "set" field.
* tree-ssa-loop-prefetch.c (PREFETCH_LATENCY,
SIMULTANEOUS_PREFETCHES): Removed.
(PREFETCH_BLOCK): Use L1_CACHE_LINE_SIZE.
(tree_ssa_prefetch_arrays): Dump the values of the parameters.
* config/sparc/sparc.c: Include params.h.
(sparc_override_options): Set SIMULTANEOUS_PREFETCHES and
L1_CACHE_LINE_SIZE parameters.
* config/sparc/sparc.h (PREFETCH_BLOCK, SIMULTANEOUS_PREFETCHES):
Removed.
* config/i386/i386.h (PREFETCH_BLOCK, SIMULTANEOUS_PREFETCHES):
Removed.
* config/i386/i386.c: Include params.h.
(k8_cost): Change default value for SIMULTANEOUS_PREFETCHES.
(override_options): Set SIMULTANEOUS_PREFETCHES and
L1_CACHE_LINE_SIZE parameters.
* config/sh/sh.h (SIMULTANEOUS_PREFETCHES): Removed.
(OPTIMIZATION_OPTIONS): Set SIMULTANEOUS_PREFETCHES and
L1_CACHE_LINE_SIZE parameters.
* config/ia64/ia64.c (ia64_optimization_options): Set
SIMULTANEOUS_PREFETCHES and L1_CACHE_LINE_SIZE parameters.
* config/ia64/ia64.h (SIMULTANEOUS_PREFETCHES, PREFETCH_BLOCK):
Removed.
* params.def (PARAM_PREFETCH_LATENCY, PARAM_SIMULTANEOUS_PREFETCHES,
PARAM_L1_CACHE_SIZE, PARAM_L1_CACHE_LINE_SIZE): New params.
* doc/invoke.texi: Document new params.
From-SVN: r118728
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 8c9174e105b..544467e074a 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -6329,6 +6329,21 @@ duplicated when threading jumps. Maximum number of fields in a structure we will treat in a field sensitive manner during pointer analysis. +@item prefetch-latency +Estimate on average number of instructions that are executed before +prefetch finishes. The distance we prefetch ahead is proportional +to this constant. Increasing this number may also lead to less +streams being prefetched (see @option{simultaneous-prefetches}). + +@item simultaneous-prefetches +Maximum number of prefetches that can run at the same time. + +@item l1-cache-line-size +The size of cache line in L1 cache, in bytes. + +@item l1-cache-size +The number of cache lines in L1 cache. + @end table @end table |