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Add some statistic gathering for cache flushes.

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This commit is contained in:
Jake Burkholder 2002-07-31 23:39:50 +00:00
parent 6136001211
commit b519494ef1
1 changed files with 41 additions and 2 deletions
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43
sys/sparc64/sparc64/cache.c
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@ -150,9 +150,13 @@
* avoided.
*/
#include "opt_pmap.h"
#include <sys/param.h>
#include <sys/linker_set.h>
#include <sys/proc.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <vm/vm.h>
@ -171,6 +175,33 @@
struct cacheinfo cache;
#ifdef PMAP_STATS
static long dcache_npage_inval;
static long dcache_npage_inval_line;
static long dcache_npage_inval_match;
static long icache_npage_inval;
static long icache_npage_inval_line;
static long icache_npage_inval_match;
SYSCTL_DECL(_debug_pmap_stats);
SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, dcache_npage_inval, CTLFLAG_RD,
&dcache_npage_inval, 0, "Number of calls to dcache_page_inval");
SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, dcache_npage_inval_line, CTLFLAG_RD,
&dcache_npage_inval_line, 0, "Number of lines checked");
SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, dcache_npage_inval_match, CTLFLAG_RD,
&dcache_npage_inval_match, 0, "Number of matching lines");
SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, icache_npage_inval, CTLFLAG_RD,
&icache_npage_inval, 0, "Number of calls to icache_page_inval");
SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, icache_npage_inval_line, CTLFLAG_RD,
&icache_npage_inval_line, 0, "Number of lines checked");
SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, icache_npage_inval_match, CTLFLAG_RD,
&icache_npage_inval_match, 0, "Number of matching lines");
#define PMAP_STATS_INC(var) atomic_add_long(&var, 1)
#else
#define PMAP_STATS_INC(var)
#endif
/* Read to %g0, needed for E$ access. */
#define CDIAG_RDG0(asi, addr) \
__asm __volatile("ldxa [%0] %1, %%g0" : : "r" (addr), "I" (asi))
@ -229,16 +260,20 @@ dcache_page_inval(vm_offset_t pa)
if (!cache.c_enabled)
return;
PMAP_STATS_INC(dcache_npage_inval);
target = pa >> (PAGE_SHIFT - DC_TAG_SHIFT);
critical_enter();
cookie = ipi_dcache_page_inval(pa);
for (addr = 0; addr < cache.dc_size; addr += cache.dc_linesize) {
PMAP_STATS_INC(dcache_npage_inval_line);
tag = ldxa(addr, ASI_DCACHE_TAG);
if (((tag >> DC_VALID_SHIFT) & DC_VALID_MASK) == 0)
continue;
tag &= DC_TAG_MASK << DC_TAG_SHIFT;
if (tag == target)
if (tag == target) {
PMAP_STATS_INC(dcache_npage_inval_match);
stxa_sync(addr, ASI_DCACHE_TAG, tag);
}
}
ipi_wait(cookie);
critical_exit();
@ -257,17 +292,21 @@ icache_page_inval(vm_offset_t pa)
if (!cache.c_enabled)
return;
PMAP_STATS_INC(icache_npage_inval);
target = pa >> (PAGE_SHIFT - IC_TAG_SHIFT);
critical_enter();
cookie = ipi_icache_page_inval(pa);
for (addr = 0; addr < cache.ic_size; addr += cache.ic_linesize) {
PMAP_STATS_INC(icache_npage_inval_line);
__asm __volatile("ldda [%1] %2, %%g0" /*, %g1 */
: "=r" (tag) : "r" (addr), "n" (ASI_ICACHE_TAG));
if (((tag >> IC_VALID_SHIFT) & IC_VALID_MASK) == 0)
continue;
tag &= IC_TAG_MASK << IC_TAG_SHIFT;
if (tag == target)
if (tag == target) {
PMAP_STATS_INC(icache_npage_inval_match);
stxa_sync(addr, ASI_ICACHE_TAG, tag);
}
}
ipi_wait(cookie);
critical_exit();