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-rw-r--r--contrib/plugins/cache.c256
1 files changed, 175 insertions, 81 deletions
diff --git a/contrib/plugins/cache.c b/contrib/plugins/cache.c
index a255e26e25..908c967a09 100644
--- a/contrib/plugins/cache.c
+++ b/contrib/plugins/cache.c
@@ -82,8 +82,9 @@ typedef struct {
char *disas_str;
const char *symbol;
uint64_t addr;
- uint64_t dmisses;
- uint64_t imisses;
+ uint64_t l1_dmisses;
+ uint64_t l1_imisses;
+ uint64_t l2_misses;
} InsnData;
void (*update_hit)(Cache *cache, int set, int blk);
@@ -93,15 +94,20 @@ void (*metadata_init)(Cache *cache);
void (*metadata_destroy)(Cache *cache);
static int cores;
-static Cache **dcaches, **icaches;
+static Cache **l1_dcaches, **l1_icaches;
+static Cache **l2_ucaches;
-static GMutex *dcache_locks;
-static GMutex *icache_locks;
+static GMutex *l1_dcache_locks;
+static GMutex *l1_icache_locks;
+static GMutex *l2_ucache_locks;
-static uint64_t all_dmem_accesses;
-static uint64_t all_imem_accesses;
-static uint64_t all_imisses;
-static uint64_t all_dmisses;
+static uint64_t l1_dmem_accesses;
+static uint64_t l1_imem_accesses;
+static uint64_t l1_imisses;
+static uint64_t l1_dmisses;
+
+static uint64_t l2_mem_accesses;
+static uint64_t l2_misses;
static int pow_of_two(int num)
{
@@ -382,6 +388,7 @@ static void vcpu_mem_access(unsigned int vcpu_index, qemu_plugin_meminfo_t info,
struct qemu_plugin_hwaddr *hwaddr;
int cache_idx;
InsnData *insn;
+ bool hit_in_l1;
hwaddr = qemu_plugin_get_hwaddr(info, vaddr);
if (hwaddr && qemu_plugin_hwaddr_is_io(hwaddr)) {
@@ -391,14 +398,29 @@ static void vcpu_mem_access(unsigned int vcpu_index, qemu_plugin_meminfo_t info,
effective_addr = hwaddr ? qemu_plugin_hwaddr_phys_addr(hwaddr) : vaddr;
cache_idx = vcpu_index % cores;
- g_mutex_lock(&dcache_locks[cache_idx]);
- if (!access_cache(dcaches[cache_idx], effective_addr)) {
+ g_mutex_lock(&l1_dcache_locks[cache_idx]);
+ hit_in_l1 = access_cache(l1_dcaches[cache_idx], effective_addr);
+ if (!hit_in_l1) {
+ insn = (InsnData *) userdata;
+ __atomic_fetch_add(&insn->l1_dmisses, 1, __ATOMIC_SEQ_CST);
+ l1_dcaches[cache_idx]->misses++;
+ }
+ l1_dcaches[cache_idx]->accesses++;
+ g_mutex_unlock(&l1_dcache_locks[cache_idx]);
+
+ if (hit_in_l1) {
+ /* No need to access L2 */
+ return;
+ }
+
+ g_mutex_lock(&l2_ucache_locks[cache_idx]);
+ if (!access_cache(l2_ucaches[cache_idx], effective_addr)) {
insn = (InsnData *) userdata;
- __atomic_fetch_add(&insn->dmisses, 1, __ATOMIC_SEQ_CST);
- dcaches[cache_idx]->misses++;
+ __atomic_fetch_add(&insn->l2_misses, 1, __ATOMIC_SEQ_CST);
+ l2_ucaches[cache_idx]->misses++;
}
- dcaches[cache_idx]->accesses++;
- g_mutex_unlock(&dcache_locks[cache_idx]);
+ l2_ucaches[cache_idx]->accesses++;
+ g_mutex_unlock(&l2_ucache_locks[cache_idx]);
}
static void vcpu_insn_exec(unsigned int vcpu_index, void *userdata)
@@ -406,18 +428,34 @@ static void vcpu_insn_exec(unsigned int vcpu_index, void *userdata)
uint64_t insn_addr;
InsnData *insn;
int cache_idx;
+ bool hit_in_l1;
insn_addr = ((InsnData *) userdata)->addr;
cache_idx = vcpu_index % cores;
- g_mutex_lock(&icache_locks[cache_idx]);
- if (!access_cache(icaches[cache_idx], insn_addr)) {
+ g_mutex_lock(&l1_icache_locks[cache_idx]);
+ hit_in_l1 = access_cache(l1_icaches[cache_idx], insn_addr);
+ if (!hit_in_l1) {
+ insn = (InsnData *) userdata;
+ __atomic_fetch_add(&insn->l1_imisses, 1, __ATOMIC_SEQ_CST);
+ l1_icaches[cache_idx]->misses++;
+ }
+ l1_icaches[cache_idx]->accesses++;
+ g_mutex_unlock(&l1_icache_locks[cache_idx]);
+
+ if (hit_in_l1) {
+ /* No need to access L2 */
+ return;
+ }
+
+ g_mutex_lock(&l2_ucache_locks[cache_idx]);
+ if (!access_cache(l2_ucaches[cache_idx], insn_addr)) {
insn = (InsnData *) userdata;
- __atomic_fetch_add(&insn->imisses, 1, __ATOMIC_SEQ_CST);
- icaches[cache_idx]->misses++;
+ __atomic_fetch_add(&insn->l2_misses, 1, __ATOMIC_SEQ_CST);
+ l2_ucaches[cache_idx]->misses++;
}
- icaches[cache_idx]->accesses++;
- g_mutex_unlock(&icache_locks[cache_idx]);
+ l2_ucaches[cache_idx]->accesses++;
+ g_mutex_unlock(&l2_ucache_locks[cache_idx]);
}
static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
@@ -493,30 +531,28 @@ static void caches_free(Cache **caches)
}
}
-static int dcmp(gconstpointer a, gconstpointer b)
-{
- InsnData *insn_a = (InsnData *) a;
- InsnData *insn_b = (InsnData *) b;
-
- return insn_a->dmisses < insn_b->dmisses ? 1 : -1;
-}
-
-static void append_stats_line(GString *line, uint64_t daccess, uint64_t dmisses,
- uint64_t iaccess, uint64_t imisses)
+static void append_stats_line(GString *line, uint64_t l1_daccess,
+ uint64_t l1_dmisses, uint64_t l1_iaccess,
+ uint64_t l1_imisses, uint64_t l2_access,
+ uint64_t l2_misses)
{
- double dmiss_rate, imiss_rate;
+ double l1_dmiss_rate, l1_imiss_rate, l2_miss_rate;
- dmiss_rate = ((double) dmisses) / (daccess) * 100.0;
- imiss_rate = ((double) imisses) / (iaccess) * 100.0;
+ l1_dmiss_rate = ((double) l1_dmisses) / (l1_daccess) * 100.0;
+ l1_imiss_rate = ((double) l1_imisses) / (l1_iaccess) * 100.0;
+ l2_miss_rate = ((double) l2_misses) / (l2_access) * 100.0;
g_string_append_printf(line, "%-14lu %-12lu %9.4lf%% %-14lu %-12lu"
- " %9.4lf%%\n",
- daccess,
- dmisses,
- daccess ? dmiss_rate : 0.0,
- iaccess,
- imisses,
- iaccess ? imiss_rate : 0.0);
+ " %9.4lf%% %-12lu %-11lu %10.4lf%%\n",
+ l1_daccess,
+ l1_dmisses,
+ l1_daccess ? l1_dmiss_rate : 0.0,
+ l1_iaccess,
+ l1_imisses,
+ l1_iaccess ? l1_imiss_rate : 0.0,
+ l2_access,
+ l2_misses,
+ l2_access ? l2_miss_rate : 0.0);
}
static void sum_stats(void)
@@ -525,43 +561,66 @@ static void sum_stats(void)
g_assert(cores > 1);
for (i = 0; i < cores; i++) {
- all_imisses += icaches[i]->misses;
- all_dmisses += dcaches[i]->misses;
- all_imem_accesses += icaches[i]->accesses;
- all_dmem_accesses += dcaches[i]->accesses;
+ l1_imisses += l1_icaches[i]->misses;
+ l1_dmisses += l1_dcaches[i]->misses;
+ l1_imem_accesses += l1_icaches[i]->accesses;
+ l1_dmem_accesses += l1_dcaches[i]->accesses;
+
+ l2_misses += l2_ucaches[i]->misses;
+ l2_mem_accesses += l2_ucaches[i]->accesses;
}
}
+static int dcmp(gconstpointer a, gconstpointer b)
+{
+ InsnData *insn_a = (InsnData *) a;
+ InsnData *insn_b = (InsnData *) b;
+
+ return insn_a->l1_dmisses < insn_b->l1_dmisses ? 1 : -1;
+}
+
static int icmp(gconstpointer a, gconstpointer b)
{
InsnData *insn_a = (InsnData *) a;
InsnData *insn_b = (InsnData *) b;
- return insn_a->imisses < insn_b->imisses ? 1 : -1;
+ return insn_a->l1_imisses < insn_b->l1_imisses ? 1 : -1;
+}
+
+static int l2_cmp(gconstpointer a, gconstpointer b)
+{
+ InsnData *insn_a = (InsnData *) a;
+ InsnData *insn_b = (InsnData *) b;
+
+ return insn_a->l2_misses < insn_b->l2_misses ? 1 : -1;
}
static void log_stats(void)
{
int i;
- Cache *icache, *dcache;
+ Cache *icache, *dcache, *l2_cache;
g_autoptr(GString) rep = g_string_new("core #, data accesses, data misses,"
" dmiss rate, insn accesses,"
- " insn misses, imiss rate\n");
+ " insn misses, imiss rate,"
+ " l2 accesses, l2 misses,"
+ " l2 miss rate\n");
for (i = 0; i < cores; i++) {
g_string_append_printf(rep, "%-8d", i);
- dcache = dcaches[i];
- icache = icaches[i];
+ dcache = l1_dcaches[i];
+ icache = l1_icaches[i];
+ l2_cache = l2_ucaches[i];
append_stats_line(rep, dcache->accesses, dcache->misses,
- icache->accesses, icache->misses);
+ icache->accesses, icache->misses, l2_cache->accesses,
+ l2_cache->misses);
}
if (cores > 1) {
sum_stats();
g_string_append_printf(rep, "%-8s", "sum");
- append_stats_line(rep, all_dmem_accesses, all_dmisses,
- all_imem_accesses, all_imisses);
+ append_stats_line(rep, l1_dmem_accesses, l1_dmisses,
+ l1_imem_accesses, l1_imisses, l2_mem_accesses, l2_misses);
}
g_string_append(rep, "\n");
@@ -585,7 +644,7 @@ static void log_top_insns(void)
if (insn->symbol) {
g_string_append_printf(rep, " (%s)", insn->symbol);
}
- g_string_append_printf(rep, ", %ld, %s\n", insn->dmisses,
+ g_string_append_printf(rep, ", %ld, %s\n", insn->l1_dmisses,
insn->disas_str);
}
@@ -598,7 +657,20 @@ static void log_top_insns(void)
if (insn->symbol) {
g_string_append_printf(rep, " (%s)", insn->symbol);
}
- g_string_append_printf(rep, ", %ld, %s\n", insn->imisses,
+ g_string_append_printf(rep, ", %ld, %s\n", insn->l1_imisses,
+ insn->disas_str);
+ }
+
+ miss_insns = g_list_sort(miss_insns, l2_cmp);
+ g_string_append_printf(rep, "%s", "\naddress, L2 misses, instruction\n");
+
+ for (curr = miss_insns, i = 0; curr && i < limit; i++, curr = curr->next) {
+ insn = (InsnData *) curr->data;
+ g_string_append_printf(rep, "0x%" PRIx64, insn->addr);
+ if (insn->symbol) {
+ g_string_append_printf(rep, " (%s)", insn->symbol);
+ }
+ g_string_append_printf(rep, ", %ld, %s\n", insn->l2_misses,
insn->disas_str);
}
@@ -611,11 +683,13 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
log_stats();
log_top_insns();
- caches_free(dcaches);
- caches_free(icaches);
+ caches_free(l1_dcaches);
+ caches_free(l1_icaches);
+ caches_free(l2_ucaches);
- g_free(dcache_locks);
- g_free(icache_locks);
+ g_free(l1_dcache_locks);
+ g_free(l1_icache_locks);
+ g_free(l2_ucache_locks);
g_hash_table_destroy(miss_ht);
}
@@ -647,19 +721,24 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
int argc, char **argv)
{
int i;
- int iassoc, iblksize, icachesize;
- int dassoc, dblksize, dcachesize;
+ int l1_iassoc, l1_iblksize, l1_icachesize;
+ int l1_dassoc, l1_dblksize, l1_dcachesize;
+ int l2_assoc, l2_blksize, l2_cachesize;
limit = 32;
sys = info->system_emulation;
- dassoc = 8;
- dblksize = 64;
- dcachesize = dblksize * dassoc * 32;
+ l1_dassoc = 8;
+ l1_dblksize = 64;
+ l1_dcachesize = l1_dblksize * l1_dassoc * 32;
+
+ l1_iassoc = 8;
+ l1_iblksize = 64;
+ l1_icachesize = l1_iblksize * l1_iassoc * 32;
- iassoc = 8;
- iblksize = 64;
- icachesize = iblksize * iassoc * 32;
+ l2_assoc = 16;
+ l2_blksize = 64;
+ l2_cachesize = l2_assoc * l2_blksize * 2048;
policy = LRU;
@@ -668,21 +747,27 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
for (i = 0; i < argc; i++) {
char *opt = argv[i];
if (g_str_has_prefix(opt, "iblksize=")) {
- iblksize = g_ascii_strtoll(opt + 9, NULL, 10);
+ l1_iblksize = g_ascii_strtoll(opt + 9, NULL, 10);
} else if (g_str_has_prefix(opt, "iassoc=")) {
- iassoc = g_ascii_strtoll(opt + 7, NULL, 10);
+ l1_iassoc = g_ascii_strtoll(opt + 7, NULL, 10);
} else if (g_str_has_prefix(opt, "icachesize=")) {
- icachesize = g_ascii_strtoll(opt + 11, NULL, 10);
+ l1_icachesize = g_ascii_strtoll(opt + 11, NULL, 10);
} else if (g_str_has_prefix(opt, "dblksize=")) {
- dblksize = g_ascii_strtoll(opt + 9, NULL, 10);
+ l1_dblksize = g_ascii_strtoll(opt + 9, NULL, 10);
} else if (g_str_has_prefix(opt, "dassoc=")) {
- dassoc = g_ascii_strtoll(opt + 7, NULL, 10);
+ l1_dassoc = g_ascii_strtoll(opt + 7, NULL, 10);
} else if (g_str_has_prefix(opt, "dcachesize=")) {
- dcachesize = g_ascii_strtoll(opt + 11, NULL, 10);
+ l1_dcachesize = g_ascii_strtoll(opt + 11, NULL, 10);
} else if (g_str_has_prefix(opt, "limit=")) {
limit = g_ascii_strtoll(opt + 6, NULL, 10);
} else if (g_str_has_prefix(opt, "cores=")) {
cores = g_ascii_strtoll(opt + 6, NULL, 10);
+ } else if (g_str_has_prefix(opt, "l2cachesize=")) {
+ l2_cachesize = g_ascii_strtoll(opt + 6, NULL, 10);
+ } else if (g_str_has_prefix(opt, "l2blksize=")) {
+ l2_blksize = g_ascii_strtoll(opt + 6, NULL, 10);
+ } else if (g_str_has_prefix(opt, "l2assoc=")) {
+ l2_assoc = g_ascii_strtoll(opt + 6, NULL, 10);
} else if (g_str_has_prefix(opt, "evict=")) {
gchar *p = opt + 6;
if (g_strcmp0(p, "rand") == 0) {
@@ -703,24 +788,33 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
policy_init();
- dcaches = caches_init(dblksize, dassoc, dcachesize);
- if (!dcaches) {
- const char *err = cache_config_error(dblksize, dassoc, dcachesize);
+ l1_dcaches = caches_init(l1_dblksize, l1_dassoc, l1_dcachesize);
+ if (!l1_dcaches) {
+ const char *err = cache_config_error(l1_dblksize, l1_dassoc, l1_dcachesize);
fprintf(stderr, "dcache cannot be constructed from given parameters\n");
fprintf(stderr, "%s\n", err);
return -1;
}
- icaches = caches_init(iblksize, iassoc, icachesize);
- if (!icaches) {
- const char *err = cache_config_error(iblksize, iassoc, icachesize);
+ l1_icaches = caches_init(l1_iblksize, l1_iassoc, l1_icachesize);
+ if (!l1_icaches) {
+ const char *err = cache_config_error(l1_iblksize, l1_iassoc, l1_icachesize);
fprintf(stderr, "icache cannot be constructed from given parameters\n");
fprintf(stderr, "%s\n", err);
return -1;
}
- dcache_locks = g_new0(GMutex, cores);
- icache_locks = g_new0(GMutex, cores);
+ l2_ucaches = caches_init(l2_blksize, l2_assoc, l2_cachesize);
+ if (!l2_ucaches) {
+ const char *err = cache_config_error(l2_blksize, l2_assoc, l2_cachesize);
+ fprintf(stderr, "L2 cache cannot be constructed from given parameters\n");
+ fprintf(stderr, "%s\n", err);
+ return -1;
+ }
+
+ l1_dcache_locks = g_new0(GMutex, cores);
+ l1_icache_locks = g_new0(GMutex, cores);
+ l2_ucache_locks = g_new0(GMutex, cores);
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-23 22:28:58 +0000