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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 | #include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <api/fs/fs.h>
#include "mem-events.h"
#include "debug.h"
#include "symbol.h"
#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
E("ldlat-loads", "cpu/mem-loads,ldlat=30/P", "mem-loads"),
E("ldlat-stores", "cpu/mem-stores/P", "mem-stores"),
};
#undef E
#undef E
char *perf_mem_events__name(int i)
{
return (char *)perf_mem_events[i].name;
}
int perf_mem_events__parse(const char *str)
{
char *tok, *saveptr = NULL;
bool found = false;
char *buf;
int j;
/* We need buffer that we know we can write to. */
buf = malloc(strlen(str) + 1);
if (!buf)
return -ENOMEM;
strcpy(buf, str);
tok = strtok_r((char *)buf, ",", &saveptr);
while (tok) {
for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
struct perf_mem_event *e = &perf_mem_events[j];
if (strstr(e->tag, tok))
e->record = found = true;
}
tok = strtok_r(NULL, ",", &saveptr);
}
free(buf);
if (found)
return 0;
pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str);
return -1;
}
int perf_mem_events__init(void)
{
const char *mnt = sysfs__mount();
bool found = false;
int j;
if (!mnt)
return -ENOENT;
for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
char path[PATH_MAX];
struct perf_mem_event *e = &perf_mem_events[j];
struct stat st;
scnprintf(path, PATH_MAX, "%s/devices/cpu/events/%s",
mnt, e->sysfs_name);
if (!stat(path, &st))
e->supported = found = true;
}
return found ? 0 : -ENOENT;
}
static const char * const tlb_access[] = {
"N/A",
"HIT",
"MISS",
"L1",
"L2",
"Walker",
"Fault",
};
int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
size_t l = 0, i;
u64 m = PERF_MEM_TLB_NA;
u64 hit, miss;
sz -= 1; /* -1 for null termination */
out[0] = '\0';
if (mem_info)
m = mem_info->data_src.mem_dtlb;
hit = m & PERF_MEM_TLB_HIT;
miss = m & PERF_MEM_TLB_MISS;
/* already taken care of */
m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS);
for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) {
if (!(m & 0x1))
continue;
if (l) {
strcat(out, " or ");
l += 4;
}
l += scnprintf(out + l, sz - l, tlb_access[i]);
}
if (*out == '\0')
l += scnprintf(out, sz - l, "N/A");
if (hit)
l += scnprintf(out + l, sz - l, " hit");
if (miss)
l += scnprintf(out + l, sz - l, " miss");
return l;
}
static const char * const mem_lvl[] = {
"N/A",
"HIT",
"MISS",
"L1",
"LFB",
"L2",
"L3",
"Local RAM",
"Remote RAM (1 hop)",
"Remote RAM (2 hops)",
"Remote Cache (1 hop)",
"Remote Cache (2 hops)",
"I/O",
"Uncached",
};
int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
size_t i, l = 0;
u64 m = PERF_MEM_LVL_NA;
u64 hit, miss;
if (mem_info)
m = mem_info->data_src.mem_lvl;
sz -= 1; /* -1 for null termination */
out[0] = '\0';
hit = m & PERF_MEM_LVL_HIT;
miss = m & PERF_MEM_LVL_MISS;
/* already taken care of */
m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS);
for (i = 0; m && i < ARRAY_SIZE(mem_lvl); i++, m >>= 1) {
if (!(m & 0x1))
continue;
if (l) {
strcat(out, " or ");
l += 4;
}
l += scnprintf(out + l, sz - l, mem_lvl[i]);
}
if (*out == '\0')
l += scnprintf(out, sz - l, "N/A");
if (hit)
l += scnprintf(out + l, sz - l, " hit");
if (miss)
l += scnprintf(out + l, sz - l, " miss");
return l;
}
static const char * const snoop_access[] = {
"N/A",
"None",
"Miss",
"Hit",
"HitM",
};
int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
size_t i, l = 0;
u64 m = PERF_MEM_SNOOP_NA;
sz -= 1; /* -1 for null termination */
out[0] = '\0';
if (mem_info)
m = mem_info->data_src.mem_snoop;
for (i = 0; m && i < ARRAY_SIZE(snoop_access); i++, m >>= 1) {
if (!(m & 0x1))
continue;
if (l) {
strcat(out, " or ");
l += 4;
}
l += scnprintf(out + l, sz - l, snoop_access[i]);
}
if (*out == '\0')
l += scnprintf(out, sz - l, "N/A");
return l;
}
int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
u64 mask = PERF_MEM_LOCK_NA;
int l;
if (mem_info)
mask = mem_info->data_src.mem_lock;
if (mask & PERF_MEM_LOCK_NA)
l = scnprintf(out, sz, "N/A");
else if (mask & PERF_MEM_LOCK_LOCKED)
l = scnprintf(out, sz, "Yes");
else
l = scnprintf(out, sz, "No");
return l;
}
int perf_script__meminfo_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
int i = 0;
i += perf_mem__lvl_scnprintf(out, sz, mem_info);
i += scnprintf(out + i, sz - i, "|SNP ");
i += perf_mem__snp_scnprintf(out + i, sz - i, mem_info);
i += scnprintf(out + i, sz - i, "|TLB ");
i += perf_mem__tlb_scnprintf(out + i, sz - i, mem_info);
i += scnprintf(out + i, sz - i, "|LCK ");
i += perf_mem__lck_scnprintf(out + i, sz - i, mem_info);
return i;
}
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