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/**
* @file op_events.c
* Details of PMC profiling events
*
* You can have silliness here.
*
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon
* @author Philippe Elie
*/
#include "op_events.h"
#include "op_libiberty.h"
#include "op_fileio.h"
#include "op_string.h"
#include "op_cpufreq.h"
#include "op_hw_specific.h"
#include "op_parse_event.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
static LIST_HEAD(events_list);
static LIST_HEAD(um_list);
static char const * filename;
static unsigned int line_nr;
static void delete_event(struct op_event * event);
static void read_events(char const * file);
static void read_unit_masks(char const * file);
static void free_unit_mask(struct op_unit_mask * um);
static char *build_fn(const char *cpu_name, const char *fn)
{
char *s;
static const char *dir;
if (dir == NULL)
dir = getenv("OPROFILE_EVENTS_DIR");
if (dir == NULL)
dir = OP_DATADIR;
s = xmalloc(strlen(dir) + strlen(cpu_name) + strlen(fn) + 5);
sprintf(s, "%s/%s/%s", dir, cpu_name, fn);
return s;
}
static void parse_error(char const * context)
{
fprintf(stderr, "oprofile: parse error in %s, line %u\n",
filename, line_nr);
fprintf(stderr, "%s\n", context);
exit(EXIT_FAILURE);
}
static int parse_int(char const * str)
{
int value;
if (sscanf(str, "%d", &value) != 1)
parse_error("expected decimal value");
return value;
}
static int parse_hex(char const * str)
{
int value;
/* 0x/0X to force the use of hexa notation for field intended to
be in hexadecimal */
if (sscanf(str, "0x%x", &value) != 1 &&
sscanf(str, "0X%x", &value) != 1)
parse_error("expected hexadecimal value");
return value;
}
static u64 parse_long_hex(char const * str)
{
u64 value;
if (sscanf(str, "%Lx", &value) != 1)
parse_error("expected long hexadecimal value");
fflush(stderr);
return value;
}
static void include_um(const char *start, const char *end)
{
char *s;
char cpu[end - start + 1];
int old_line_nr;
const char *old_filename;
strncpy(cpu, start, end - start);
cpu[end - start] = 0;
s = build_fn(cpu, "unit_masks");
old_line_nr = line_nr;
old_filename = filename;
read_unit_masks(s);
line_nr = old_line_nr;
filename = old_filename;
free(s);
}
/* extra:cmask=12,inv,edge */
unsigned parse_extra(const char *s)
{
unsigned v, w;
int o;
/* This signifies that the first word of the description is unique */
v = EXTRA_NONE;
while (*s) {
if (isspace(*s))
break;
if (strisprefix(s, "edge")) {
v |= EXTRA_EDGE;
s += 4;
} else if (strisprefix(s, "inv")) {
v |= EXTRA_INV;
s += 3;
} else if (sscanf(s, "cmask=%x%n", &w, &o) >= 1) {
v |= (w & EXTRA_CMASK_MASK) << EXTRA_CMASK_SHIFT;
s += o;
} else if (strisprefix(s, "any")) {
v |= EXTRA_ANY;
s += 3;
} else if (strisprefix(s, "pebs")) {
v |= EXTRA_PEBS;
s += 4;
} else {
parse_error("Illegal extra field modifier");
}
if (*s == ',')
++s;
}
return v;
}
/* name:MESI type:bitmask default:0x0f */
static void parse_um(struct op_unit_mask * um, char const * line)
{
int seen_name = 0;
int seen_type = 0;
int seen_default = 0;
char const * valueend = line + 1;
char const * tagend = line + 1;
char const * start = line;
while (*valueend) {
valueend = skip_nonws(valueend);
while (*tagend != ':' && *tagend)
++tagend;
if (valueend == tagend)
break;
if (!*tagend)
parse_error("parse_um() expected :value");
++tagend;
if (strisprefix(start, "include")) {
if (seen_name + seen_type + seen_default > 0)
parse_error("include must be on its own");
free_unit_mask(um);
include_um(tagend, valueend);
return;
}
if (strisprefix(start, "name")) {
if (seen_name)
parse_error("duplicate name: tag");
seen_name = 1;
um->name = op_xstrndup(tagend, valueend - tagend);
} else if (strisprefix(start, "type")) {
if (seen_type)
parse_error("duplicate type: tag");
seen_type = 1;
if (strisprefix(tagend, "mandatory")) {
um->unit_type_mask = utm_mandatory;
} else if (strisprefix(tagend, "bitmask")) {
um->unit_type_mask = utm_bitmask;
} else if (strisprefix(tagend, "exclusive")) {
um->unit_type_mask = utm_exclusive;
} else {
parse_error("invalid unit mask type");
}
} else if (strisprefix(start, "default")) {
if (seen_default)
parse_error("duplicate default: tag");
seen_default = 1;
if (0 != strncmp(tagend, "0x", 2)) {
um->default_mask_name = op_xstrndup(
tagend, valueend - tagend);
} else {
um->default_mask = parse_hex(tagend);
}
} else {
parse_error("invalid unit mask tag");
}
valueend = skip_ws(valueend);
tagend = valueend;
start = valueend;
}
if (!um->name)
parse_error("Missing name for unit mask");
if (!seen_type)
parse_error("Missing type for unit mask");
}
/* \t0x08 (M)odified cache state */
/* \t0x08 extra:inv,cmask=... mod_cach_state (M)odified cache state */
static void parse_um_entry(struct op_described_um * entry, char const * line)
{
char const * c = line;
/* value */
c = skip_ws(c);
entry->value = parse_hex(c);
/* extra: */
c = skip_nonws(c);
c = skip_ws(c);
if (!*c)
goto invalid_out;
if (strisprefix(c, "extra:")) {
c += 6;
entry->extra = parse_extra(c);
/* named mask */
c = skip_nonws(c);
c = skip_ws(c);
if (!*c)
goto invalid_out;
/* "extra:" !!ALWAYS!! followed by named mask */
entry->name = op_xstrndup(c, strcspn(c, " \t"));
c = skip_nonws(c);
c = skip_ws(c);
} else {
entry->extra = 0;
}
/* desc */
if (!*c) {
/* This is a corner case where the named unit mask entry
* only has one word. This should really be fixed in the
* unit_mask file */
entry->desc = xstrdup(entry->name);
} else
entry->desc = xstrdup(c);
return;
invalid_out:
parse_error("invalid unit mask entry");
}
static struct op_unit_mask * new_unit_mask(void)
{
struct op_unit_mask * um = xmalloc(sizeof(struct op_unit_mask));
memset(um, '\0', sizeof(struct op_unit_mask));
list_add_tail(&um->um_next, &um_list);
return um;
}
static void free_unit_mask(struct op_unit_mask * um)
{
list_del(&um->um_next);
free(um);
um = NULL;
}
/*
* name:zero type:mandatory default:0x0
* \t0x0 No unit mask
*/
static void read_unit_masks(char const * file)
{
struct op_unit_mask * um = NULL;
char * line;
FILE * fp = fopen(file, "r");
if (!fp) {
fprintf(stderr,
"oprofile: could not open unit mask description file %s\n", file);
exit(EXIT_FAILURE);
}
filename = file;
line_nr = 1;
line = op_get_line(fp);
while (line) {
if (empty_line(line) || comment_line(line))
goto next;
if (line[0] != '\t') {
um = new_unit_mask();
parse_um(um, line);
} else {
if (!um)
parse_error("no unit mask name line");
parse_um_entry(&um->um[um->num], line);
++(um->num);
}
next:
free(line);
line = op_get_line(fp);
++line_nr;
}
fclose(fp);
}
static u32 parse_counter_mask(char const * str)
{
u32 mask = 0;
char const * numstart = str;
while (*numstart) {
mask |= 1 << parse_int(numstart);
while (*numstart && *numstart != ',')
++numstart;
/* skip , unless we reach eos */
if (*numstart)
++numstart;
numstart = skip_ws(numstart);
}
return mask;
}
static struct op_unit_mask * try_find_um(char const * value)
{
struct list_head * pos;
list_for_each(pos, &um_list) {
struct op_unit_mask * um = list_entry(pos, struct op_unit_mask, um_next);
if (strcmp(value, um->name) == 0) {
um->used = 1;
return um;
}
}
return NULL;
}
static struct op_unit_mask * find_um(char const * value)
{
struct op_unit_mask * um = try_find_um(value);
if (um)
return um;
fprintf(stderr, "oprofile: could not find unit mask %s\n", value);
exit(EXIT_FAILURE);
}
/* um:a,b,c,d merge multiple unit masks */
static struct op_unit_mask * merge_um(char * value)
{
int num;
char *s;
struct op_unit_mask *new, *um;
enum unit_mask_type type = -1U;
um = try_find_um(value);
if (um)
return um;
new = new_unit_mask();
new->name = xstrdup(value);
new->used = 1;
num = 0;
while ((s = strsep(&value, ",")) != NULL) {
unsigned c;
um = find_um(s);
if (type == -1U)
type = um->unit_type_mask;
if (um->unit_type_mask != type)
parse_error("combined unit mask must be all the same types");
if (type != utm_bitmask && type != utm_exclusive)
parse_error("combined unit mask must be all bitmasks or exclusive");
new->default_mask |= um->default_mask;
new->num += um->num;
if (new->num > MAX_UNIT_MASK)
parse_error("too many members in combined unit mask");
for (c = 0; c < um->num; c++, num++) {
new->um[num] = um->um[c];
new->um[num].desc = xstrdup(new->um[num].desc);
}
}
if (type == -1U)
parse_error("Empty unit mask");
new->unit_type_mask = type;
return new;
}
/* parse either a "tag:value" or a ": trailing description string" */
static int next_token(char const ** cp, char ** name, char ** value)
{
size_t tag_len;
size_t val_len;
char const * c = *cp;
char const * end;
char const * colon;
c = skip_ws(c);
end = colon = c;
end = skip_nonws(end);
colon = strchr(colon, ':');
if (!colon) {
if (*c)
parse_error("next_token(): garbage at end of line");
return 0;
}
if (colon >= end)
parse_error("next_token() expected ':'");
tag_len = colon - c;
val_len = end - (colon + 1);
if (!tag_len) {
/* : trailing description */
end = skip_ws(end);
*name = xstrdup("desc");
*value = xstrdup(end);
end += strlen(end);
} else {
/* tag:value */
*name = op_xstrndup(c, tag_len);
*value = op_xstrndup(colon + 1, val_len);
end = skip_ws(end);
}
*cp = end;
return 1;
}
static void include_events (char *value)
{
char * event_file;
const char *old_filename;
int old_line_nr;
event_file = build_fn(value, "events");
old_line_nr = line_nr;
old_filename = filename;
read_events(event_file);
line_nr = old_line_nr;
filename = old_filename;
free(event_file);
}
static struct op_event * new_event(void)
{
struct op_event * event = xmalloc(sizeof(struct op_event));
memset(event, '\0', sizeof(struct op_event));
list_add_tail(&event->event_next, &events_list);
return event;
}
static void free_event(struct op_event * event)
{
list_del(&event->event_next);
free(event);
}
/* event:0x00 counters:0 um:zero minimum:4096 name:ISSUES : Total issues */
/* event:0x00 ext:xxxxxx um:zero minimum:4096 name:ISSUES : Total issues */
static void read_events(char const * file)
{
struct op_event * event = NULL;
char * line;
char * name;
char * value;
char const * c;
int seen_event, seen_counters, seen_um, seen_minimum, seen_name, seen_ext;
FILE * fp = fopen(file, "r");
int tags;
if (!fp) {
fprintf(stderr, "oprofile: could not open event description file %s\n", file);
exit(EXIT_FAILURE);
}
filename = file;
line_nr = 1;
line = op_get_line(fp);
while (line) {
if (empty_line(line) || comment_line(line))
goto next;
tags = 0;
seen_name = 0;
seen_event = 0;
seen_counters = 0;
seen_ext = 0;
seen_um = 0;
seen_minimum = 0;
event = new_event();
event->filter = -1;
event->ext = NULL;
c = line;
while (next_token(&c, &name, &value)) {
if (strcmp(name, "name") == 0) {
if (seen_name)
parse_error("duplicate name: tag");
seen_name = 1;
if (strchr(value, '/') != NULL)
parse_error("invalid event name");
if (strchr(value, '.') != NULL)
parse_error("invalid event name");
event->name = value;
} else if (strcmp(name, "event") == 0) {
if (seen_event)
parse_error("duplicate event: tag");
seen_event = 1;
event->val = parse_hex(value);
free(value);
} else if (strcmp(name, "counters") == 0) {
if (seen_counters)
parse_error("duplicate counters: tag");
seen_counters = 1;
if (!strcmp(value, "cpuid"))
event->counter_mask = arch_get_counter_mask();
else
event->counter_mask = parse_counter_mask(value);
free(value);
} else if (strcmp(name, "ext") == 0) {
if (seen_ext)
parse_error("duplicate ext: tag");
seen_ext = 1;
event->ext = value;
} else if (strcmp(name, "um") == 0) {
if (seen_um)
parse_error("duplicate um: tag");
seen_um = 1;
if (strchr(value, ','))
event->unit = merge_um(value);
else
event->unit = find_um(value);
free(value);
} else if (strcmp(name, "minimum") == 0) {
if (seen_minimum)
parse_error("duplicate minimum: tag");
seen_minimum = 1;
event->min_count = parse_int(value);
free(value);
} else if (strcmp(name, "desc") == 0) {
event->desc = value;
} else if (strcmp(name, "filter") == 0) {
event->filter = parse_int(value);
free(value);
} else if (strcmp(name, "include") == 0) {
if (tags > 0)
parse_error("tags before include:");
free_event(event);
include_events(value);
free(value);
c = skip_ws(c);
if (*c != '\0' && *c != '#')
parse_error("non whitespace after include:");
break;
} else {
parse_error("unknown tag");
}
tags++;
free(name);
}
next:
free(line);
line = op_get_line(fp);
++line_nr;
}
fclose(fp);
}
/* usefull for make check */
static int check_unit_mask(struct op_unit_mask const * um,
char const * cpu_name)
{
u32 i;
int err = 0;
if (!um->used) {
fprintf(stderr, "um %s is not used\n", um->name);
err = EXIT_FAILURE;
}
if (um->unit_type_mask == utm_mandatory && um->num != 1) {
fprintf(stderr, "mandatory um %s doesn't contain exactly one "
"entry (%s)\n", um->name, cpu_name);
err = EXIT_FAILURE;
} else if (um->unit_type_mask == utm_bitmask) {
u32 default_mask = um->default_mask;
for (i = 0; i < um->num; ++i)
default_mask &= ~um->um[i].value;
if (default_mask) {
fprintf(stderr, "um %s default mask is not valid "
"(%s)\n", um->name, cpu_name);
err = EXIT_FAILURE;
}
} else if (um->unit_type_mask == utm_exclusive) {
if (um->default_mask_name) {
for (i = 0; i < um->num; ++i) {
if (0 == strcmp(um->default_mask_name,
um->um[i].name))
break;
}
} else {
for (i = 0; i < um->num; ++i) {
if (um->default_mask == um->um[i].value)
break;
}
}
if (i == um->num) {
fprintf(stderr, "exclusive um %s default value is not "
"valid (%s)\n", um->name, cpu_name);
err = EXIT_FAILURE;
}
}
return err;
}
static void arch_filter_events(op_cpu cpu_type)
{
struct list_head * pos, * pos2;
unsigned filter = arch_get_filter(cpu_type);
if (!filter)
return;
list_for_each_safe (pos, pos2, &events_list) {
struct op_event * event = list_entry(pos, struct op_event, event_next);
if (event->filter >= 0 && ((1U << event->filter) & filter))
delete_event(event);
}
}
static void load_events_name(const char *cpu_name)
{
char * event_file;
char * um_file;
event_file = build_fn(cpu_name, "events");
um_file = build_fn(cpu_name, "unit_masks");
read_unit_masks(um_file);
read_events(event_file);
free(um_file);
free(event_file);
}
static void load_events(op_cpu cpu_type)
{
const char * cpu_name = op_get_cpu_name(cpu_type);
struct list_head * pos;
struct op_event *event;
struct op_unit_mask *unit_mask;
int err = 0;
if (!list_empty(&events_list))
return;
load_events_name(cpu_name);
arch_filter_events(cpu_type);
/* sanity check: all unit mask must be used */
list_for_each(pos, &um_list) {
struct op_unit_mask * um = list_entry(pos, struct op_unit_mask, um_next);
err |= check_unit_mask(um, cpu_name);
}
if (err)
exit(err);
if (!op_cpu_has_timer_fs())
return;
/* sanity check: Don't use event `TIMER' since it is predefined. */
list_for_each(pos, &events_list) {
struct op_event * event = list_entry(pos, struct op_event,
event_next);
if (strcmp(event->name, TIMER_EVENT_NAME) == 0) {
fprintf(stderr, "Error: " TIMER_EVENT_NAME
" event cannot be redefined.\n");
exit(EXIT_FAILURE);
}
if (event->val == TIMER_EVENT_VALUE) {
fprintf(stderr, "Error: Event %s uses " TIMER_EVENT_NAME
" which is reserverd for timer based sampling.\n",
event->name);
exit(EXIT_FAILURE);
}
}
list_for_each(pos, &um_list) {
struct op_unit_mask * um = list_entry(pos, struct op_unit_mask,
um_next);
if (strcmp(um->name, TIMER_EVENT_UNIT_MASK_NAME) == 0) {
fprintf(stderr, "Error: " TIMER_EVENT_UNIT_MASK_NAME
" unit mask cannot be redefined.\n");
exit(EXIT_FAILURE);
}
}
unit_mask = new_unit_mask();
unit_mask->name = xstrdup(TIMER_EVENT_UNIT_MASK_NAME);
unit_mask->num = 1;
unit_mask->unit_type_mask = utm_mandatory;
unit_mask->um[0].extra = 0;
unit_mask->um[0].value = 0;
unit_mask->um[0].name = xstrdup("");
unit_mask->um[0].desc = xstrdup("No unit mask");
unit_mask->used = 1;
event = new_event();
event->name = xstrdup(TIMER_EVENT_NAME);
event->desc = xstrdup(TIMER_EVENT_DESC);
event->val = TIMER_EVENT_VALUE;
event->unit = unit_mask;
event->min_count = 0;
event->filter = 0;
event->counter_mask = 1 << (op_get_nr_counters(cpu_type) - 1);
event->ext = NULL;
event->filter = -1;
}
struct list_head * op_events(op_cpu cpu_type)
{
load_events(cpu_type);
arch_filter_events(cpu_type);
return &events_list;
}
static void delete_unit_mask(struct op_unit_mask * unit)
{
u32 cur;
for (cur = 0 ; cur < unit->num ; ++cur) {
if (unit->um[cur].desc)
free(unit->um[cur].desc);
}
if (unit->name)
free(unit->name);
list_del(&unit->um_next);
free(unit);
}
static void delete_event(struct op_event * event)
{
if (event->name)
free(event->name);
if (event->desc)
free(event->desc);
list_del(&event->event_next);
free(event);
}
void op_free_events(void)
{
struct list_head * pos, * pos2;
list_for_each_safe(pos, pos2, &events_list) {
struct op_event * event = list_entry(pos, struct op_event, event_next);
delete_event(event);
}
list_for_each_safe(pos, pos2, &um_list) {
struct op_unit_mask * unit = list_entry(pos, struct op_unit_mask, um_next);
delete_unit_mask(unit);
}
}
/* There can be actually multiple events here, so this is not quite correct */
static struct op_event * find_event_any(u32 nr)
{
struct list_head * pos;
list_for_each(pos, &events_list) {
struct op_event * event = list_entry(pos, struct op_event, event_next);
if (event->val == nr)
return event;
}
return NULL;
}
static struct op_event * find_event_um(u32 nr, u32 um)
{
struct list_head * pos;
unsigned int i;
list_for_each(pos, &events_list) {
struct op_event * event = list_entry(pos, struct op_event, event_next);
if (event->val == nr) {
for (i = 0; i < event->unit->num; i++) {
if (event->unit->um[i].value == um)
return event;
}
}
}
return NULL;
}
static FILE * open_event_mapping_file(char const * cpu_name)
{
char * ev_map_file;
char * dir;
dir = getenv("OPROFILE_EVENTS_DIR");
if (dir == NULL)
dir = OP_DATADIR;
ev_map_file = xmalloc(strlen(dir) + strlen("/") + strlen(cpu_name) +
strlen("/") + + strlen("event_mappings") + 1);
strcpy(ev_map_file, dir);
strcat(ev_map_file, "/");
strcat(ev_map_file, cpu_name);
strcat(ev_map_file, "/");
strcat(ev_map_file, "event_mappings");
filename = ev_map_file;
return (fopen(ev_map_file, "r"));
}
/**
* This function is PPC64-specific.
*/
static char const * get_mapping(u32 nr, FILE * fp)
{
char * line;
char * name;
char * value;
char const * c;
char * map = NULL;
int seen_event = 0, seen_mmcr0 = 0, seen_mmcr1 = 0, seen_mmcra = 0;
u32 mmcr0 = 0;
u64 mmcr1 = 0;
u32 mmcra = 0;
int event_found = 0;
line_nr = 1;
line = op_get_line(fp);
while (line && !event_found) {
if (empty_line(line) || comment_line(line))
goto next;
seen_event = 0;
seen_mmcr0 = 0;
seen_mmcr1 = 0;
seen_mmcra = 0;
mmcr0 = 0;
mmcr1 = 0;
mmcra = 0;
c = line;
while (next_token(&c, &name, &value)) {
if (strcmp(name, "event") == 0) {
u32 evt;
if (seen_event)
parse_error("duplicate event tag");
seen_event = 1;
evt = parse_hex(value);
if (evt == nr)
event_found = 1;
free(value);
} else if (strcmp(name, "mmcr0") == 0) {
if (seen_mmcr0)
parse_error("duplicate mmcr0 tag");
seen_mmcr0 = 1;
mmcr0 = parse_hex(value);
free(value);
} else if (strcmp(name, "mmcr1") == 0) {
if (seen_mmcr1)
parse_error("duplicate mmcr1: tag");
seen_mmcr1 = 1;
mmcr1 = parse_long_hex(value);
free(value);
} else if (strcmp(name, "mmcra") == 0) {
if (seen_mmcra)
parse_error("duplicate mmcra: tag");
seen_mmcra = 1;
mmcra = parse_hex(value);
free(value);
} else {
parse_error("unknown tag");
}
free(name);
}
next:
free(line);
line = op_get_line(fp);
++line_nr;
}
if (event_found) {
if (!seen_mmcr0 || !seen_mmcr1 || !seen_mmcra) {
fprintf(stderr, "Error: Missing information in line %d of event mapping file %s\n", line_nr, filename);
exit(EXIT_FAILURE);
}
map = xmalloc(70);
snprintf(map, 70, "mmcr0:%u mmcr1:%Lu mmcra:%u",
mmcr0, mmcr1, mmcra);
}
return map;
}
char const * find_mapping_for_event(u32 nr, op_cpu cpu_type)
{
char const * cpu_name = op_get_cpu_name(cpu_type);
FILE * fp = open_event_mapping_file(cpu_name);
char const * map = NULL;
switch (cpu_type) {
case CPU_PPC64_PA6T:
case CPU_PPC64_970:
case CPU_PPC64_970MP:
case CPU_PPC64_POWER4:
case CPU_PPC64_POWER5:
case CPU_PPC64_POWER5p:
case CPU_PPC64_POWER5pp:
case CPU_PPC64_POWER6:
case CPU_PPC64_POWER7:
case CPU_PPC64_IBM_COMPAT_V1:
// For ppc64 types of CPU_PPC64_ARCH_V1 and higher, we don't need an event_mappings file
if (!fp) {
fprintf(stderr, "oprofile: could not open event mapping file %s\n", filename);
exit(EXIT_FAILURE);
} else {
map = get_mapping(nr, fp);
}
break;
default:
break;
}
if (fp)
fclose(fp);
return map;
}
static int match_event(int i, struct op_event *event, unsigned um)
{
unsigned v = event->unit->um[i].value;
switch (event->unit->unit_type_mask) {
case utm_exclusive:
case utm_mandatory:
return v == um;
case utm_bitmask:
return (v & um) || (!v && v == 0);
}
abort();
}
struct op_event * find_event_by_name(char const * name, unsigned um, int um_valid)
{
struct list_head * pos;
list_for_each(pos, &events_list) {
struct op_event * event = list_entry(pos, struct op_event, event_next);
if (strcmp(event->name, name) == 0) {
if (um_valid) {
unsigned i;
for (i = 0; i < event->unit->num; i++)
if (match_event(i, event, um))
return event;
continue;
}
return event;
}
}
return NULL;
}
static struct op_event * find_next_event(struct op_event * e)
{
struct list_head * n;
for (n = e->event_next.next; n != &events_list; n = n->next) {
struct op_event * ne = list_entry(n, struct op_event, event_next);
if (!strcmp(e->name, ne->name))
return ne;
}
return NULL;
}
struct op_event * op_find_event(op_cpu cpu_type, u32 nr, u32 um)
{
struct op_event * event;
load_events(cpu_type);
event = find_event_um(nr, um);
return event;
}
struct op_event * op_find_event_any(op_cpu cpu_type, u32 nr)
{
load_events(cpu_type);
return find_event_any(nr);
}
static int _is_um_valid_bitmask(struct op_event * event, u32 passed_um)
{
int duped_um[MAX_UNIT_MASK];
int retval = 0;
u32 masked_val = 0;
u32 i, k;
int dup_value_used = 0;
struct op_event evt;
struct op_unit_mask * tmp_um = xmalloc(sizeof(struct op_unit_mask));
struct op_unit_mask * tmp_um_no_dups = xmalloc(sizeof(struct op_unit_mask));
memset(tmp_um, '\0', sizeof(struct op_unit_mask));;
memset(tmp_um_no_dups, '\0', sizeof(struct op_unit_mask));
memset(duped_um, '\0', sizeof(int) * MAX_UNIT_MASK);
// First, we make a copy of the event, with just its unit mask values.
evt.unit = tmp_um;
evt.unit->num = event->unit->num;
for (i = 0; i < event->unit->num; i++)
evt.unit->um[i].value = event->unit->um[i].value;
// Next, we sort the unit mask values in ascending order.
for (i = 1; i < evt.unit->num; i++) {
int j = i - 1;
u32 tmp = evt.unit->um[i].value;
while (j >= 0 && tmp < evt.unit->um[j].value) {
evt.unit->um[j + 1].value = evt.unit->um[j].value;
j -= 1;
}
evt.unit->um[j + 1].value = tmp;
}
/* Now we remove duplicates. Duplicate unit mask values were not
* allowed until the "named unit mask" support was added in
* release 0.9.7. The down side to this is that if the user passed
* a unit mask value that includes one of the duplicated values,
* we have no way of differentiating between the duplicates, so
* the meaning of the bitmask would be ambiguous if we were to
* allow it. Thus, we must prevent the user from specifying such
* bitmasks.
*/
for (i = 0, k = 0; k < evt.unit->num; i++) {
tmp_um_no_dups->um[i].value = evt.unit->um[k].value;
tmp_um_no_dups->num++;
k++;
while ((evt.unit->um[i].value == evt.unit->um[k].value) && i < evt.unit->num) {
k++;
duped_um[i] = 1;
}
}
evt.unit = tmp_um_no_dups;
// Now check if passed um==0 and if the defined event has a UM with value '0'.
if (!passed_um) {
for (i = 0; i < evt.unit->num; i++) {
if (!evt.unit->um[i].value)
return 1;
}
}
/* Finally, we'll see if the passed unit mask value can be matched with a
* mask of available unit mask values. We check for this by determining
* whether the exact bits set in the current um are also set in the
* passed um; if so, we OR those bits into a cumulative masked_val variable.
* Simultaneously, we check if the passed um contains a non-unique unit
* mask value, in which case, it's invalid..
*/
for (i = 0; i < evt.unit->num; i++) {
if ((evt.unit->um[i].value & passed_um) == evt.unit->um[i].value) {
masked_val |= evt.unit->um[i].value;
if (duped_um[i]) {
dup_value_used = 1;
break;
}
}
}
if (dup_value_used) {
fprintf(stderr, "Ambiguous bitmask: Unit mask values"
" cannot include non-unique numerical values (i.e., 0x%x).\n",
evt.unit->um[i].value);
fprintf(stderr, "Use ophelp to see the unit mask values for event %s.\n",
event->name);
} else if (masked_val == passed_um && passed_um != 0) {
retval = 1;
}
free(tmp_um);
free(tmp_um_no_dups);
return retval;
}
int op_check_events(int ctr, u32 nr, u32 um, op_cpu cpu_type)
{
int ret = OP_INVALID_EVENT;
size_t i;
u32 ctr_mask = 1 << ctr;
struct list_head * pos;
load_events(cpu_type);
list_for_each(pos, &events_list) {
struct op_event * event = list_entry(pos, struct op_event, event_next);
if (event->val != nr)
continue;
ret = OP_OK_EVENT;
if ((event->counter_mask & ctr_mask) == 0)
ret |= OP_INVALID_COUNTER;
if (event->unit->unit_type_mask == utm_bitmask) {
if (!_is_um_valid_bitmask(event, um))
ret |= OP_INVALID_UM;
} else {
for (i = 0; i < event->unit->num; ++i) {
if (event->unit->um[i].value == um)
break;
}
if (i == event->unit->num)
ret |= OP_INVALID_UM;
}
if (ret == OP_OK_EVENT)
return ret;
}
return ret;
}
void op_default_event(op_cpu cpu_type, struct op_default_event_descr * descr)
{
descr->name = "";
descr->um = 0x0;
/* A fixed value of CPU cycles; this should ensure good
* granulity even on faster CPUs, though it will generate more
* interrupts.
*/
descr->count = 100000;
switch (cpu_type) {
case CPU_PPRO:
case CPU_PII:
case CPU_PIII:
case CPU_P6_MOBILE:
case CPU_CORE:
case CPU_CORE_2:
case CPU_ATHLON:
case CPU_HAMMER:
case CPU_FAMILY10:
case CPU_ARCH_PERFMON:
case CPU_FAMILY11H:
case CPU_ATOM:
case CPU_CORE_I7:
case CPU_NEHALEM:
case CPU_HASWELL:
case CPU_SILVERMONT:
case CPU_WESTMERE:
case CPU_SANDYBRIDGE:
case CPU_IVYBRIDGE:
case CPU_MIPS_LOONGSON2:
case CPU_FAMILY12H:
case CPU_FAMILY14H:
case CPU_FAMILY15H:
case CPU_AMD64_GENERIC:
descr->name = "CPU_CLK_UNHALTED";
break;
case CPU_RTC:
descr->name = "RTC_INTERRUPTS";
descr->count = 1024;
break;
case CPU_P4:
case CPU_P4_HT2:
descr->name = "GLOBAL_POWER_EVENTS";
descr->um = 0x1;
break;
case CPU_IA64:
case CPU_IA64_1:
case CPU_IA64_2:
descr->count = 1000000;
descr->name = "CPU_CYCLES";
break;
case CPU_AXP_EV4:
case CPU_AXP_EV5:
case CPU_AXP_PCA56:
case CPU_AXP_EV6:
case CPU_AXP_EV67:
descr->name = "CYCLES";
break;
// we could possibly use the CCNT
case CPU_ARM_XSCALE1:
case CPU_ARM_XSCALE2:
case CPU_ARM_MPCORE:
case CPU_ARM_V6:
case CPU_ARM_V7:
case CPU_ARM_V7_CA5:
case CPU_ARM_V7_CA7:
case CPU_ARM_V7_CA9:
case CPU_ARM_V7_CA15:
case CPU_AVR32:
case CPU_ARM_SCORPION:
case CPU_ARM_SCORPIONMP:
case CPU_ARM_KRAIT:
case CPU_ARM_V8_APM_XGENE:
descr->name = "CPU_CYCLES";
break;
case CPU_PPC64_PA6T:
case CPU_PPC64_970:
case CPU_PPC64_970MP:
case CPU_PPC_7450:
case CPU_PPC64_POWER4:
case CPU_PPC64_POWER5:
case CPU_PPC64_POWER6:
case CPU_PPC64_POWER5p:
case CPU_PPC64_POWER5pp:
case CPU_PPC64_CELL:
case CPU_PPC64_POWER7:
case CPU_PPC64_IBM_COMPAT_V1:
case CPU_PPC64_ARCH_V1:
case CPU_PPC64_POWER8:
descr->name = "CYCLES";
break;
case CPU_MIPS_20K:
descr->name = "CYCLES";
break;
case CPU_MIPS_24K:
case CPU_MIPS_34K:
case CPU_MIPS_74K:
case CPU_MIPS_1004K:
descr->name = "INSTRUCTIONS";
break;
case CPU_MIPS_5K:
case CPU_MIPS_25K:
descr->name = "CYCLES";
break;
case CPU_MIPS_R10000:
case CPU_MIPS_R12000:
descr->name = "INSTRUCTIONS_GRADUATED";
break;
case CPU_MIPS_RM7000:
case CPU_MIPS_RM9000:
descr->name = "INSTRUCTIONS_ISSUED";
break;
case CPU_MIPS_SB1:
descr->name = "INSN_SURVIVED_STAGE7";
break;
case CPU_MIPS_VR5432:
case CPU_MIPS_VR5500:
descr->name = "INSTRUCTIONS_EXECUTED";
break;
case CPU_PPC_E500:
case CPU_PPC_E500_2:
case CPU_PPC_E500MC:
case CPU_PPC_E6500:
case CPU_PPC_E300:
descr->name = "CPU_CLK";
break;
case CPU_S390_Z10:
case CPU_S390_Z196:
case CPU_S390_ZEC12:
if (op_get_nr_counters(cpu_type) > 1) {
descr->name = "HWSAMPLING";
descr->count = 4127518;
} else {
descr->name = TIMER_EVENT_NAME;
descr->count = 10000;
}
break;
case CPU_TILE_TILE64:
case CPU_TILE_TILEPRO:
case CPU_TILE_TILEGX:
descr->name = "ONE";
break;
// don't use default, if someone add a cpu he wants a compiler
// warning if he forgets to handle it here.
case CPU_TIMER_INT:
case CPU_NO_GOOD:
case MAX_CPU_TYPE:
break;
}
}
static void extra_check(struct op_event *e, char *name, unsigned w)
{
int found;
unsigned i;
if (!e->unit->um[w].extra) {
fprintf(stderr,
"Named unit mask (%s) not allowed for event without 'extra:' values.\n"
"Please specify the numerical value for the unit mask. See 'opcontrol'\n"
"or 'operf' man page for more info.\n", name);
exit(EXIT_FAILURE);
}
found = 0;
for (i = 0; i < e->unit->num; i++) {
int len = strcspn(e->unit->um[i].desc, " \t");
if (!strncmp(name, e->unit->um[i].desc, len) &&
name[len] == '\0')
found++;
}
if (found > 1) {
fprintf(stderr,
"Unit mask name `%s' not unique. Please use a numerical unit mask\n", name);
exit(EXIT_FAILURE);
}
}
static void do_resolve_unit_mask(struct op_event *e,
struct parsed_event *pe, u32 *extra)
{
unsigned i;
/* If not specified um and the default um is name type
* we populate pe unitmask name with default name */
if ((e->unit->default_mask_name != NULL) &&
(pe->unit_mask_name == NULL) && (!pe->unit_mask_valid)) {
pe->unit_mask_name = xstrdup(e->unit->default_mask_name);
}
for (;;) {
if (pe->unit_mask_name == NULL) {
/* For numerical unit mask */
int found = 0;
/* Use default unitmask if not specified */
if (!pe->unit_mask_valid) {
pe->unit_mask_valid = 1;
pe->unit_mask = e->unit->default_mask;
}
/* Checking to see there are any duplicate numerical unit mask
* in which case it should be using named unit mask instead.
*/
for (i = 0; i < e->unit->num; i++) {
if (e->unit->um[i].value == (unsigned int)pe->unit_mask)
found++;
}
if (found > 1) {
fprintf(stderr, "Unit mask (0x%x) is non unique.\n"
"Please specify the unit mask using the first "
"word of the description\n",
pe->unit_mask);
exit(EXIT_FAILURE);
}
if (i == e->unit->num) {
e = find_next_event(e);
if (e != NULL)
continue;
}
return;
} else {
/* For named unit mask */
for (i = 0; i < e->unit->num; i++) {
int len = 0;
if (e->unit->um[i].name)
len = strlen(e->unit->um[i].name);
if (len
&& (!strncmp(pe->unit_mask_name,
e->unit->um[i].name, len))
&& (pe->unit_mask_name[len] == '\0'))
break;
}
if (i == e->unit->num) {
e = find_next_event(e);
if (e != NULL)
continue;
fprintf(stderr, "Cannot find unit mask %s for %s\n",
pe->unit_mask_name, pe->name);
exit(EXIT_FAILURE);
}
extra_check(e, pe->unit_mask_name, i);
pe->unit_mask_valid = 1;
pe->unit_mask = e->unit->um[i].value;
if (extra) {
if (e->unit->um[i].extra == EXTRA_NONE)
*extra = e->unit->um[i].value;
else
*extra = e->unit->um[i].extra;
}
return;
}
}
}
void op_resolve_unit_mask(struct parsed_event *pe, u32 *extra)
{
struct op_event *e;
e = find_event_by_name(pe->name, 0, 0);
if (!e) {
fprintf(stderr, "Cannot find event %s\n", pe->name);
exit(EXIT_FAILURE);
}
return do_resolve_unit_mask(e, pe, extra);
}