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invoke.texi (l1-cache-size): Update documentation. 

* doc/invoke.texi (l1-cache-size): Update documentation.
	(l2-cache-size): Document.
	* params.h (L2_CACHE_SIZE): New macro.
	* tree-ssa-loop-prefetch.c (L1_CACHE_SIZE_BYTES): Reflect
	that L1_CACHE_SIZE is in kB now.
	(L2_CACHE_SIZE_BYTES): New macro.
	(tree_ssa_prefetch_arrays): Show size in kB.
	* config/i386/i386.h (struct processor_costs): Add l1_cache_size
	and l2_cache_size fields.
	* config/i386/driver-i386.c (describe_cache): Detect cache size
	in kB.
	* config/i386/i386.c (size_cost, i386_cost, i486_cost,pentium_cost,
	pentiumpro_cost, geode_cost, k6_cost, athlon_cost, k8_cost,
	amdfam10_cost, pentium4_cost, nocona_cost, core2_cost,
	generic64_cost, generic32_cost): Add l1_cache_size and l2_cache_size.
	(override_options): Set l1-cache-size and l2-cache-size to default
	values if not specified otherwise.
	* params.def (PARAM_L1_CACHE_SIZE): Change to set in kB.
	(PARAM_L2_CACHE_SIZE): New.

From-SVN: r127117
This commit is contained in:
Zdenek Dvorak 2007-08-01 12:57:03 +02:00 committed by Zdenek Dvorak
parent 0ea339ea4d
commit 46cb04410d
8 changed files with 84 additions and 13 deletions
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22
gcc/ChangeLog
View File

@ -1,3 +1,25 @@
2007-08-01 Zdenek Dvorak <ook@ucw.cz>
* doc/invoke.texi (l1-cache-size): Update documentation.
(l2-cache-size): Document.
* params.h (L2_CACHE_SIZE): New macro.
* tree-ssa-loop-prefetch.c (L1_CACHE_SIZE_BYTES): Reflect
that L1_CACHE_SIZE is in kB now.
(L2_CACHE_SIZE_BYTES): New macro.
(tree_ssa_prefetch_arrays): Show size in kB.
* config/i386/i386.h (struct processor_costs): Add l1_cache_size
and l2_cache_size fields.
* config/i386/driver-i386.c (describe_cache): Detect cache size
in kB.
* config/i386/i386.c (size_cost, i386_cost, i486_cost,pentium_cost,
pentiumpro_cost, geode_cost, k6_cost, athlon_cost, k8_cost,
amdfam10_cost, pentium4_cost, nocona_cost, core2_cost,
generic64_cost, generic32_cost): Add l1_cache_size and l2_cache_size.
(override_options): Set l1-cache-size and l2-cache-size to default
values if not specified otherwise.
* params.def (PARAM_L1_CACHE_SIZE): Change to set in kB.
(PARAM_L2_CACHE_SIZE): New.
2007-08-01 Nigel Stephens <nigel@mips.com>
David Ung <davidu@mips.com>
Thiemo Seufer <ths@mips.com>

5
gcc/config/i386/driver-i386.c
View File

@ -56,14 +56,11 @@ describe_cache (unsigned l1_sizekb, unsigned l1_line,
unsigned l1_assoc ATTRIBUTE_UNUSED)
{
char size[1000], line[1000];
unsigned size_in_lines;
/* At the moment, gcc middle-end does not use the information about the
associativity of the cache. */
size_in_lines = (l1_sizekb * 1024) / l1_line;
sprintf (size, "--param l1-cache-size=%u", size_in_lines);
sprintf (size, "--param l1-cache-size=%u", l1_sizekb);
sprintf (line, "--param l1-cache-line-size=%u", l1_line);
return concat (size, " ", line, " ", NULL);

39
gcc/config/i386/i386.c
View File

@ -113,6 +113,8 @@ struct processor_costs size_cost = { /* costs for tuning for size */
{3, 3, 3}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3, /* MMX or SSE register to integer */
0, /* size of l1 cache */
0, /* size of l2 cache */
0, /* size of prefetch block */
0, /* number of parallel prefetches */
2, /* Branch cost */
@ -171,6 +173,8 @@ struct processor_costs i386_cost = { /* 386 specific costs */
{4, 8, 16}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3, /* MMX or SSE register to integer */
0, /* size of l1 cache */
0, /* size of l2 cache */
0, /* size of prefetch block */
0, /* number of parallel prefetches */
1, /* Branch cost */
@ -228,6 +232,10 @@ struct processor_costs i486_cost = { /* 486 specific costs */
{4, 8, 16}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3, /* MMX or SSE register to integer */
4, /* size of l1 cache. 486 has 8kB cache
shared for code and data, so 4kB is
not really precise. */
4, /* size of l2 cache */
0, /* size of prefetch block */
0, /* number of parallel prefetches */
1, /* Branch cost */
@ -285,6 +293,8 @@ struct processor_costs pentium_cost = {
{4, 8, 16}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3, /* MMX or SSE register to integer */
8, /* size of l1 cache. */
8, /* size of l2 cache */
0, /* size of prefetch block */
0, /* number of parallel prefetches */
2, /* Branch cost */
@ -342,6 +352,8 @@ struct processor_costs pentiumpro_cost = {
{2, 2, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3, /* MMX or SSE register to integer */
8, /* size of l1 cache. */
256, /* size of l2 cache */
32, /* size of prefetch block */
6, /* number of parallel prefetches */
2, /* Branch cost */
@ -407,6 +419,8 @@ struct processor_costs geode_cost = {
{1, 1, 1}, /* cost of storing SSE registers
in SImode, DImode and TImode */
1, /* MMX or SSE register to integer */
64, /* size of l1 cache. */
128, /* size of l2 cache. */
32, /* size of prefetch block */
1, /* number of parallel prefetches */
1, /* Branch cost */
@ -464,6 +478,11 @@ struct processor_costs k6_cost = {
{2, 2, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
6, /* MMX or SSE register to integer */
32, /* size of l1 cache. */
32, /* size of l2 cache. Some models
have integrated l2 cache, but
optimizing for k6 is not important
enough to worry about that. */
32, /* size of prefetch block */
1, /* number of parallel prefetches */
1, /* Branch cost */
@ -521,6 +540,8 @@ struct processor_costs athlon_cost = {
{4, 4, 5}, /* cost of storing SSE registers
in SImode, DImode and TImode */
5, /* MMX or SSE register to integer */
64, /* size of l1 cache. */
256, /* size of l2 cache. */
64, /* size of prefetch block */
6, /* number of parallel prefetches */
5, /* Branch cost */
@ -581,6 +602,8 @@ struct processor_costs k8_cost = {
{4, 4, 5}, /* cost of storing SSE registers
in SImode, DImode and TImode */
5, /* MMX or SSE register to integer */
64, /* size of l1 cache. */
512, /* size of l2 cache. */
64, /* size of prefetch block */
/* New AMD processors never drop prefetches; if they cannot be performed
immediately, they are queued. We set number of simultaneous prefetches
@ -654,6 +677,8 @@ struct processor_costs amdfam10_cost = {
1/1 1/1
MOVD reg32, xmmreg Double FADD 3
1/1 1/1 */
64, /* size of l1 cache. */
512, /* size of l2 cache. */
64, /* size of prefetch block */
/* New AMD processors never drop prefetches; if they cannot be performed
immediately, they are queued. We set number of simultaneous prefetches
@ -721,6 +746,8 @@ struct processor_costs pentium4_cost = {
{2, 2, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
10, /* MMX or SSE register to integer */
8, /* size of l1 cache. */
256, /* size of l2 cache. */
64, /* size of prefetch block */
6, /* number of parallel prefetches */
2, /* Branch cost */
@ -779,6 +806,8 @@ struct processor_costs nocona_cost = {
{12, 12, 12}, /* cost of storing SSE registers
in SImode, DImode and TImode */
8, /* MMX or SSE register to integer */
8, /* size of l1 cache. */
1024, /* size of l2 cache. */
128, /* size of prefetch block */
8, /* number of parallel prefetches */
1, /* Branch cost */
@ -838,6 +867,8 @@ struct processor_costs core2_cost = {
{4, 4, 4}, /* cost of storing SSE registers
in SImode, DImode and TImode */
2, /* MMX or SSE register to integer */
32, /* size of l1 cache. */
2048, /* size of l2 cache. */
128, /* size of prefetch block */
8, /* number of parallel prefetches */
3, /* Branch cost */
@ -903,6 +934,8 @@ struct processor_costs generic64_cost = {
{8, 8, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
5, /* MMX or SSE register to integer */
32, /* size of l1 cache. */
512, /* size of l2 cache. */
64, /* size of prefetch block */
6, /* number of parallel prefetches */
/* Benchmarks shows large regressions on K8 sixtrack benchmark when this value
@ -963,6 +996,8 @@ struct processor_costs generic32_cost = {
{8, 8, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
5, /* MMX or SSE register to integer */
32, /* size of l1 cache. */
256, /* size of l2 cache. */
64, /* size of prefetch block */
6, /* number of parallel prefetches */
3, /* Branch cost */
@ -2419,6 +2454,10 @@ override_options (void)
ix86_cost->simultaneous_prefetches);
if (!PARAM_SET_P (PARAM_L1_CACHE_LINE_SIZE))
set_param_value ("l1-cache-line-size", ix86_cost->prefetch_block);
if (!PARAM_SET_P (PARAM_L1_CACHE_SIZE))
set_param_value ("l1-cache-size", ix86_cost->l1_cache_size);
if (!PARAM_SET_P (PARAM_L2_CACHE_SIZE))
set_param_value ("l2-cache-size", ix86_cost->l2_cache_size);
}
/* Return true if this goes in large data/bss. */

2
gcc/config/i386/i386.h
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@ -124,6 +124,8 @@ struct processor_costs {
in SImode, DImode and TImode*/
const int mmxsse_to_integer; /* cost of moving mmxsse register to
integer and vice versa. */
const int l1_cache_size; /* size of l1 cache, in kilobytes. */
const int l2_cache_size; /* size of l2 cache, in kilobytes. */
const int prefetch_block; /* bytes moved to cache for prefetch. */
const int simultaneous_prefetches; /* number of parallel prefetch
operations. */

5
gcc/doc/invoke.texi
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@ -6958,7 +6958,10 @@ Maximum number of prefetches that can run at the same time.
The size of cache line in L1 cache, in bytes.
@item l1-cache-size
The number of cache lines in L1 cache.
The size of L1 cache, in kilobytes.
@item l2-cache-size
The size of L2 cache, in kilobytes.
@item use-canonical-types
Whether the compiler should use the ``canonical'' type system. By

11
gcc/params.def
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@ -656,12 +656,12 @@ DEFPARAM (PARAM_SIMULTANEOUS_PREFETCHES,
"The number of prefetches that can run at the same time",
3, 0, 0)
/* The size of L1 cache in number of cache lines. */
/* The size of L1 cache in kB. */
DEFPARAM (PARAM_L1_CACHE_SIZE,
"l1-cache-size",
"The size of L1 cache",
1024, 0, 0)
64, 0, 0)
/* The size of L1 cache line in bytes. */
@ -670,6 +670,13 @@ DEFPARAM (PARAM_L1_CACHE_LINE_SIZE,
"The size of L1 cache line",
32, 0, 0)
/* The size of L2 cache in kB. */
DEFPARAM (PARAM_L2_CACHE_SIZE,
"l2-cache-size",
"The size of L2 cache",
512, 0, 0)
/* Whether we should use canonical types rather than deep "structural"
type checking. Setting this value to 1 (the default) improves
compilation performance in the C++ and Objective-C++ front end;

2
gcc/params.h
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@ -165,6 +165,8 @@ typedef enum compiler_param
PARAM_VALUE (PARAM_L1_CACHE_SIZE)
#define L1_CACHE_LINE_SIZE \
PARAM_VALUE (PARAM_L1_CACHE_LINE_SIZE)
#define L2_CACHE_SIZE \
PARAM_VALUE (PARAM_L2_CACHE_SIZE)
#define USE_CANONICAL_TYPES \
PARAM_VALUE (PARAM_USE_CANONICAL_TYPES)
#endif /* ! GCC_PARAMS_H */

11
gcc/tree-ssa-loop-prefetch.c
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@ -166,9 +166,8 @@ along with GCC; see the file COPYING3. If not see
#define HAVE_prefetch 0
#endif
#define L1_CACHE_SIZE_BYTES ((unsigned) (L1_CACHE_SIZE * L1_CACHE_LINE_SIZE))
/* TODO: Add parameter to specify L2 cache size. */
#define L2_CACHE_SIZE_BYTES (8 * L1_CACHE_SIZE_BYTES)
#define L1_CACHE_SIZE_BYTES ((unsigned) (L1_CACHE_SIZE * 1024))
#define L2_CACHE_SIZE_BYTES ((unsigned) (L2_CACHE_SIZE * 1024))
/* We consider a memory access nontemporal if it is not reused sooner than
after L2_CACHE_SIZE_BYTES of memory are accessed. However, we ignore
@ -1549,10 +1548,10 @@ tree_ssa_prefetch_arrays (void)
SIMULTANEOUS_PREFETCHES);
fprintf (dump_file, " prefetch latency: %d\n", PREFETCH_LATENCY);
fprintf (dump_file, " prefetch block size: %d\n", PREFETCH_BLOCK);
fprintf (dump_file, " L1 cache size: %d lines, %d bytes\n",
L1_CACHE_SIZE, L1_CACHE_SIZE_BYTES);
fprintf (dump_file, " L1 cache size: %d lines, %d kB\n",
L1_CACHE_SIZE_BYTES / L1_CACHE_LINE_SIZE, L1_CACHE_SIZE);
fprintf (dump_file, " L1 cache line size: %d\n", L1_CACHE_LINE_SIZE);
fprintf (dump_file, " L2 cache size: %d bytes\n", L2_CACHE_SIZE_BYTES);
fprintf (dump_file, " L2 cache size: %d kB\n", L2_CACHE_SIZE);
fprintf (dump_file, "\n");
}