tools/perf/util/mem-events.c - kernel/msm-4.19 - Gitiles

 #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 <linux/kernel.h>
 #include "mem-events.h"
 #include "debug.h"
 #include "symbol.h"
 #include "sort.h"

 unsigned int perf_mem_events__loads_ldlat = 30;

 #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=%u/P",	"mem-loads"),
 	E("ldlat-stores",	"cpu/mem-stores/P",		"mem-stores"),
 };
 #undef E

 #undef E

 static char mem_loads_name[100];
 static bool mem_loads_name__init;

 char *perf_mem_events__name(int i)
 {
 	if (i == PERF_MEM_EVENTS__LOAD) {
 		if (!mem_loads_name__init) {
 			mem_loads_name__init = true;
 			scnprintf(mem_loads_name, sizeof(mem_loads_name),
 				  perf_mem_events[i].name,
 				  perf_mem_events__loads_ldlat);
 		}
 		return mem_loads_name;
 	}

 	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;
 }

 int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi)
 {
 	union perf_mem_data_src *data_src = &mi->data_src;
 	u64 daddr  = mi->daddr.addr;
 	u64 op     = data_src->mem_op;
 	u64 lvl    = data_src->mem_lvl;
 	u64 snoop  = data_src->mem_snoop;
 	u64 lock   = data_src->mem_lock;
 	int err = 0;

 #define HITM_INC(__f)		\
 do {				\
 	stats->__f++;		\
 	stats->tot_hitm++;	\
 } while (0)

 #define P(a, b) PERF_MEM_##a##_##b

 	stats->nr_entries++;

 	if (lock & P(LOCK, LOCKED)) stats->locks++;

 	if (op & P(OP, LOAD)) {
 		/* load */
 		stats->load++;

 		if (!daddr) {
 			stats->ld_noadrs++;
 			return -1;
 		}

 		if (lvl & P(LVL, HIT)) {
 			if (lvl & P(LVL, UNC)) stats->ld_uncache++;
 			if (lvl & P(LVL, IO))  stats->ld_io++;
 			if (lvl & P(LVL, LFB)) stats->ld_fbhit++;
 			if (lvl & P(LVL, L1 )) stats->ld_l1hit++;
 			if (lvl & P(LVL, L2 )) stats->ld_l2hit++;
 			if (lvl & P(LVL, L3 )) {
 				if (snoop & P(SNOOP, HITM))
 					HITM_INC(lcl_hitm);
 				else
 					stats->ld_llchit++;
 			}

 			if (lvl & P(LVL, LOC_RAM)) {
 				stats->lcl_dram++;
 				if (snoop & P(SNOOP, HIT))
 					stats->ld_shared++;
 				else
 					stats->ld_excl++;
 			}

 			if ((lvl & P(LVL, REM_RAM1)) ||
 			    (lvl & P(LVL, REM_RAM2))) {
 				stats->rmt_dram++;
 				if (snoop & P(SNOOP, HIT))
 					stats->ld_shared++;
 				else
 					stats->ld_excl++;
 			}
 		}

 		if ((lvl & P(LVL, REM_CCE1)) ||
 		    (lvl & P(LVL, REM_CCE2))) {
 			if (snoop & P(SNOOP, HIT))
 				stats->rmt_hit++;
 			else if (snoop & P(SNOOP, HITM))
 				HITM_INC(rmt_hitm);
 		}

 		if ((lvl & P(LVL, MISS)))
 			stats->ld_miss++;

 	} else if (op & P(OP, STORE)) {
 		/* store */
 		stats->store++;

 		if (!daddr) {
 			stats->st_noadrs++;
 			return -1;
 		}

 		if (lvl & P(LVL, HIT)) {
 			if (lvl & P(LVL, UNC)) stats->st_uncache++;
 			if (lvl & P(LVL, L1 )) stats->st_l1hit++;
 		}
 		if (lvl & P(LVL, MISS))
 			if (lvl & P(LVL, L1)) stats->st_l1miss++;
 	} else {
 		/* unparsable data_src? */
 		stats->noparse++;
 		return -1;
 	}

 	if (!mi->daddr.map || !mi->iaddr.map) {
 		stats->nomap++;
 		return -1;
 	}

 #undef P
 #undef HITM_INC
 	return err;
 }

 void c2c_add_stats(struct c2c_stats *stats, struct c2c_stats *add)
 {
 	stats->nr_entries	+= add->nr_entries;

 	stats->locks		+= add->locks;
 	stats->store		+= add->store;
 	stats->st_uncache	+= add->st_uncache;
 	stats->st_noadrs	+= add->st_noadrs;
 	stats->st_l1hit		+= add->st_l1hit;
 	stats->st_l1miss	+= add->st_l1miss;
 	stats->load		+= add->load;
 	stats->ld_excl		+= add->ld_excl;
 	stats->ld_shared	+= add->ld_shared;
 	stats->ld_uncache	+= add->ld_uncache;
 	stats->ld_io		+= add->ld_io;
 	stats->ld_miss		+= add->ld_miss;
 	stats->ld_noadrs	+= add->ld_noadrs;
 	stats->ld_fbhit		+= add->ld_fbhit;
 	stats->ld_l1hit		+= add->ld_l1hit;
 	stats->ld_l2hit		+= add->ld_l2hit;
 	stats->ld_llchit	+= add->ld_llchit;
 	stats->lcl_hitm		+= add->lcl_hitm;
 	stats->rmt_hitm		+= add->rmt_hitm;
 	stats->tot_hitm		+= add->tot_hitm;
 	stats->rmt_hit		+= add->rmt_hit;
 	stats->lcl_dram		+= add->lcl_dram;
 	stats->rmt_dram		+= add->rmt_dram;
 	stats->nomap		+= add->nomap;
 	stats->noparse		+= add->noparse;
 }
	#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 <linux/kernel.h>
	#include "mem-events.h"
	#include "debug.h"
	#include "symbol.h"
	#include "sort.h"

	unsigned int perf_mem_events__loads_ldlat = 30;

	#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=%u/P", "mem-loads"),
	E("ldlat-stores", "cpu/mem-stores/P", "mem-stores"),
	};
	#undef E

	#undef E

	static char mem_loads_name[100];
	static bool mem_loads_name__init;

	char *perf_mem_events__name(int i)
	{
	if (i == PERF_MEM_EVENTS__LOAD) {
	if (!mem_loads_name__init) {
	mem_loads_name__init = true;
	scnprintf(mem_loads_name, sizeof(mem_loads_name),
	perf_mem_events[i].name,
	perf_mem_events__loads_ldlat);
	}
	return mem_loads_name;
	}

	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;
	}

	int c2c_decode_stats(struct c2c_stats stats, struct mem_info mi)
	{
	union perf_mem_data_src *data_src = &mi->data_src;
	u64 daddr = mi->daddr.addr;
	u64 op = data_src->mem_op;
	u64 lvl = data_src->mem_lvl;
	u64 snoop = data_src->mem_snoop;
	u64 lock = data_src->mem_lock;
	int err = 0;

	#define HITM_INC(__f) \
	do { \
	stats->__f++; \
	stats->tot_hitm++; \
	} while (0)

	#define P(a, b) PERF_MEM_##a##_##b

	stats->nr_entries++;

	if (lock & P(LOCK, LOCKED)) stats->locks++;

	if (op & P(OP, LOAD)) {
	/* load */
	stats->load++;

	if (!daddr) {
	stats->ld_noadrs++;
	return -1;
	}

	if (lvl & P(LVL, HIT)) {
	if (lvl & P(LVL, UNC)) stats->ld_uncache++;
	if (lvl & P(LVL, IO)) stats->ld_io++;
	if (lvl & P(LVL, LFB)) stats->ld_fbhit++;
	if (lvl & P(LVL, L1 )) stats->ld_l1hit++;
	if (lvl & P(LVL, L2 )) stats->ld_l2hit++;
	if (lvl & P(LVL, L3 )) {
	if (snoop & P(SNOOP, HITM))
	HITM_INC(lcl_hitm);
	else
	stats->ld_llchit++;
	}

	if (lvl & P(LVL, LOC_RAM)) {
	stats->lcl_dram++;
	if (snoop & P(SNOOP, HIT))
	stats->ld_shared++;
	else
	stats->ld_excl++;
	}

	if ((lvl & P(LVL, REM_RAM1)) \|\|
	(lvl & P(LVL, REM_RAM2))) {
	stats->rmt_dram++;
	if (snoop & P(SNOOP, HIT))
	stats->ld_shared++;
	else
	stats->ld_excl++;
	}
	}

	if ((lvl & P(LVL, REM_CCE1)) \|\|
	(lvl & P(LVL, REM_CCE2))) {
	if (snoop & P(SNOOP, HIT))
	stats->rmt_hit++;
	else if (snoop & P(SNOOP, HITM))
	HITM_INC(rmt_hitm);
	}

	if ((lvl & P(LVL, MISS)))
	stats->ld_miss++;

	} else if (op & P(OP, STORE)) {
	/* store */
	stats->store++;

	if (!daddr) {
	stats->st_noadrs++;
	return -1;
	}

	if (lvl & P(LVL, HIT)) {
	if (lvl & P(LVL, UNC)) stats->st_uncache++;
	if (lvl & P(LVL, L1 )) stats->st_l1hit++;
	}
	if (lvl & P(LVL, MISS))
	if (lvl & P(LVL, L1)) stats->st_l1miss++;
	} else {
	/* unparsable data_src? */
	stats->noparse++;
	return -1;
	}

	if (!mi->daddr.map \|\| !mi->iaddr.map) {
	stats->nomap++;
	return -1;
	}

	#undef P
	#undef HITM_INC
	return err;
	}

	void c2c_add_stats(struct c2c_stats stats, struct c2c_stats add)
	{
	stats->nr_entries += add->nr_entries;

	stats->locks += add->locks;
	stats->store += add->store;
	stats->st_uncache += add->st_uncache;
	stats->st_noadrs += add->st_noadrs;
	stats->st_l1hit += add->st_l1hit;
	stats->st_l1miss += add->st_l1miss;
	stats->load += add->load;
	stats->ld_excl += add->ld_excl;
	stats->ld_shared += add->ld_shared;
	stats->ld_uncache += add->ld_uncache;
	stats->ld_io += add->ld_io;
	stats->ld_miss += add->ld_miss;
	stats->ld_noadrs += add->ld_noadrs;
	stats->ld_fbhit += add->ld_fbhit;
	stats->ld_l1hit += add->ld_l1hit;
	stats->ld_l2hit += add->ld_l2hit;
	stats->ld_llchit += add->ld_llchit;
	stats->lcl_hitm += add->lcl_hitm;
	stats->rmt_hitm += add->rmt_hitm;
	stats->tot_hitm += add->tot_hitm;
	stats->rmt_hit += add->rmt_hit;
	stats->lcl_dram += add->lcl_dram;
	stats->rmt_dram += add->rmt_dram;
	stats->nomap += add->nomap;
	stats->noparse += add->noparse;
	}