#include "util/map_symbol.h"
#include "util/branch.h"
#include <linux/kernel.h>
static bool cross_area(u64 addr1, u64 addr2, int size)
{
u64 align1, align2;
align1 = addr1 & ~(size - 1 );
align2 = addr2 & ~(size - 1 );
return (align1 != align2) ? true : false ;
}
#define AREA_4K 4096
#define AREA_2M (2 * 1024 * 1024 )
void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
u64 from, u64 to)
{
if (flags->type == PERF_BR_UNKNOWN || from == 0 )
return ;
if (flags->type == PERF_BR_EXTEND_ABI)
st->new_counts[flags->new_type]++;
else
st->counts[flags->type]++;
if (flags->type == PERF_BR_COND) {
if (to > from)
st->cond_fwd++;
else
st->cond_bwd++;
}
if (cross_area(from, to, AREA_2M))
st->cross_2m++;
else if (cross_area(from, to, AREA_4K))
st->cross_4k++;
}
const char *branch_new_type_name(int new_type)
{
const char *branch_new_names[PERF_BR_NEW_MAX] = {
"FAULT_ALGN" ,
"FAULT_DATA" ,
"FAULT_INST" ,
/*
* TODO : This switch should happen on ' perf_session__env ( session ) - > arch '
* instead , because an arm64 platform perf recording could be
* opened for analysis on other platforms as well .
*/
#ifdef __aarch64__
"ARM64_FIQ" ,
"ARM64_DEBUG_HALT" ,
"ARM64_DEBUG_EXIT" ,
"ARM64_DEBUG_INST" ,
"ARM64_DEBUG_DATA"
#else
"ARCH_1" ,
"ARCH_2" ,
"ARCH_3" ,
"ARCH_4" ,
"ARCH_5"
#endif
};
if (new_type >= 0 && new_type < PERF_BR_NEW_MAX)
return branch_new_names[new_type];
return NULL;
}
const char *branch_type_name(int type)
{
const char *branch_names[PERF_BR_MAX] = {
"N/A" ,
"COND" ,
"UNCOND" ,
"IND" ,
"CALL" ,
"IND_CALL" ,
"RET" ,
"SYSCALL" ,
"SYSRET" ,
"COND_CALL" ,
"COND_RET" ,
"ERET" ,
"IRQ" ,
"SERROR" ,
"NO_TX" ,
"" , // Needed for PERF_BR_EXTEND_ABI that ends up triggering some compiler warnings about NULL deref
};
if (type >= 0 && type < PERF_BR_MAX)
return branch_names[type];
return NULL;
}
const char *get_branch_type(struct branch_entry *e)
{
if (e->flags.type == PERF_BR_UNKNOWN)
return "" ;
if (e->flags.type == PERF_BR_EXTEND_ABI)
return branch_new_type_name(e->flags.new_type);
return branch_type_name(e->flags.type);
}
void branch_type_stat_display(FILE *fp, const struct branch_type_stat *st)
{
u64 total = 0 ;
int i;
for (i = 0 ; i < PERF_BR_MAX; i++)
total += st->counts[i];
if (total == 0 )
return ;
fprintf(fp, "\n#" );
fprintf(fp, "\n# Branch Statistics:" );
fprintf(fp, "\n#" );
if (st->cond_fwd > 0 ) {
fprintf(fp, "\n%8s: %5.1f%%" ,
"COND_FWD" ,
100 .0 * (double )st->cond_fwd / (double )total);
}
if (st->cond_bwd > 0 ) {
fprintf(fp, "\n%8s: %5.1f%%" ,
"COND_BWD" ,
100 .0 * (double )st->cond_bwd / (double )total);
}
if (st->cross_4k > 0 ) {
fprintf(fp, "\n%8s: %5.1f%%" ,
"CROSS_4K" ,
100 .0 * (double )st->cross_4k / (double )total);
}
if (st->cross_2m > 0 ) {
fprintf(fp, "\n%8s: %5.1f%%" ,
"CROSS_2M" ,
100 .0 * (double )st->cross_2m / (double )total);
}
for (i = 0 ; i < PERF_BR_MAX; i++) {
if (st->counts[i] > 0 )
fprintf(fp, "\n%8s: %5.1f%%" ,
branch_type_name(i),
100 .0 *
(double )st->counts[i] / (double )total);
}
for (i = 0 ; i < PERF_BR_NEW_MAX; i++) {
if (st->new_counts[i] > 0 )
fprintf(fp, "\n%8s: %5.1f%%" ,
branch_new_type_name(i),
100 .0 *
(double )st->new_counts[i] / (double )total);
}
}
static int count_str_scnprintf(int idx, const char *str, char *bf, int size)
{
return scnprintf(bf, size, "%s%s" , (idx) ? " " : " (" , str);
}
int branch_type_str(const struct branch_type_stat *st, char *bf, int size)
{
int i, j = 0 , printed = 0 ;
u64 total = 0 ;
for (i = 0 ; i < PERF_BR_MAX; i++)
total += st->counts[i];
for (i = 0 ; i < PERF_BR_NEW_MAX; i++)
total += st->new_counts[i];
if (total == 0 )
return 0 ;
if (st->cond_fwd > 0 )
printed += count_str_scnprintf(j++, "COND_FWD" , bf + printed, size - printed);
if (st->cond_bwd > 0 )
printed += count_str_scnprintf(j++, "COND_BWD" , bf + printed, size - printed);
for (i = 0 ; i < PERF_BR_MAX; i++) {
if (i == PERF_BR_COND)
continue ;
if (st->counts[i] > 0 )
printed += count_str_scnprintf(j++, branch_type_name(i), bf + printed, size - printed);
}
for (i = 0 ; i < PERF_BR_NEW_MAX; i++) {
if (st->new_counts[i] > 0 )
printed += count_str_scnprintf(j++, branch_new_type_name(i), bf + printed, size - printed);
}
if (st->cross_4k > 0 )
printed += count_str_scnprintf(j++, "CROSS_4K" , bf + printed, size - printed);
if (st->cross_2m > 0 )
printed += count_str_scnprintf(j++, "CROSS_2M" , bf + printed, size - printed);
return printed;
}
const char *branch_spec_desc(int spec)
{
const char *branch_spec_outcomes[PERF_BR_SPEC_MAX] = {
"N/A" ,
"SPEC_WRONG_PATH" ,
"NON_SPEC_CORRECT_PATH" ,
"SPEC_CORRECT_PATH" ,
};
if (spec >= 0 && spec < PERF_BR_SPEC_MAX)
return branch_spec_outcomes[spec];
return NULL;
}
Messung V0.5 in Prozent C=93 H=94 G=93
¤ Dauer der Verarbeitung: 0.2 Sekunden
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