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#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 'session->header.env.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;
}
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