[261633]: libop / op_events.c Maximize Restore History

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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 <string.h>
#include <stdlib.h>
#include <stdio.h>
static LIST_HEAD(events_list);
static LIST_HEAD(um_list);
static char const * filename;
static unsigned int line_nr;
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;
if (sscanf(str, "%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;
}
/* 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, "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;
um->default_mask = parse_hex(tagend);
} else {
parse_error("invalid unit mask tag");
}
valueend = skip_ws(valueend);
tagend = valueend;
start = valueend;
}
}
/* \t0x08 (M)odified cache state */
static void parse_um_entry(struct op_described_um * entry, char const * line)
{
char const * c = line;
c = skip_ws(c);
entry->value = parse_hex(c);
c = skip_nonws(c);
if (!*c)
parse_error("invalid unit mask entry");
c = skip_ws(c);
if (!*c)
parse_error("invalid unit mask entry");
entry->desc = xstrdup(c);
}
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;
}
/*
* 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");
if (um->num >= MAX_UNIT_MASK)
parse_error("oprofile: maximum unit mask entries exceeded");
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 * 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)
return um;
}
fprintf(stderr, "oprofile: could not find unit mask %s\n", value);
exit(EXIT_FAILURE);
}
/* 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 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;
}
/* event:0x00 counters:0 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;
FILE * fp = fopen(file, "r");
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;
seen_name = 0;
seen_event = 0;
seen_counters = 0;
seen_um = 0;
seen_minimum = 0;
event = new_event();
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");
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;
event->counter_mask = parse_counter_mask(value);
free(value);
} else if (strcmp(name, "um") == 0) {
if (seen_um)
parse_error("duplicate um: tag");
seen_um = 1;
event->unit = find_um(value);
event->unit->used = 1;
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 {
parse_error("unknown tag");
}
free(name);
}
next:
free(line);
line = op_get_line(fp);
++line_nr;
}
fclose(fp);
}
/* usefull for make check */
static void check_unit_mask(struct op_unit_mask const * um,
char const * cpu_name)
{
u32 i;
if (!um->used) {
fprintf(stderr, "um %s is not used\n", um->name);
exit(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);
exit(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);
exit(EXIT_FAILURE);
}
} 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);
exit(EXIT_FAILURE);
}
}
}
static void load_events(op_cpu cpu_type)
{
char const * cpu_name = op_get_cpu_name(cpu_type);
char * event_dir;
char * event_file;
char * um_file;
char * dir;
struct list_head * pos;
if (!list_empty(&events_list))
return;
dir = getenv("OPROFILE_EVENTS_DIR");
if (dir == NULL)
dir = OP_DATADIR;
event_dir = xmalloc(strlen(dir) + strlen("/") + strlen(cpu_name) +
strlen("/") + 1);
strcpy(event_dir, dir);
strcat(event_dir, "/");
strcat(event_dir, cpu_name);
strcat(event_dir, "/");
event_file = xmalloc(strlen(event_dir) + strlen("events") + 1);
strcpy(event_file, event_dir);
strcat(event_file, "events");
um_file = xmalloc(strlen(event_dir) + strlen("unit_masks") + 1);
strcpy(um_file, event_dir);
strcat(um_file, "unit_masks");
read_unit_masks(um_file);
read_events(event_file);
/* 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);
check_unit_mask(um, cpu_name);
}
free(um_file);
free(event_file);
free(event_dir);
}
struct list_head * op_events(op_cpu cpu_type)
{
load_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);
}
}
static struct op_event * find_event(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 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_970:
case CPU_PPC64_970MP:
case CPU_PPC64_POWER4:
case CPU_PPC64_POWER5:
case CPU_PPC64_POWER5p:
case CPU_PPC64_POWER6:
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;
}
struct op_event * find_event_by_name(char const * name)
{
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)
return event;
}
return NULL;
}
struct op_event * op_find_event(op_cpu cpu_type, u32 nr)
{
struct op_event * event;
load_events(cpu_type);
event = find_event(nr);
return event;
}
int op_check_events(int ctr, u32 nr, u32 um, op_cpu cpu_type)
{
int ret = OP_OK_EVENT;
struct op_event * event;
size_t i;
u32 ctr_mask = 1 << ctr;
load_events(cpu_type);
event = find_event(nr);
if (!event) {
ret |= OP_INVALID_EVENT;
return ret;
}
if ((event->counter_mask & ctr_mask) == 0)
ret |= OP_INVALID_COUNTER;
if (event->unit->unit_type_mask == utm_bitmask) {
for (i = 0; i < event->unit->num; ++i)
um &= ~(event->unit->um[i].value);
if (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;
}
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:
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:
descr->name = "CPU_CYCLES";
break;
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_CELL:
descr->name = "CYCLES";
break;
case CPU_MIPS_20K:
descr->name = "CYCLES";
break;
case CPU_MIPS_24K:
descr->name = "INSTRUCTIONS";
break;
case CPU_MIPS_34K:
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:
descr->name = "CPU_CLK";
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;
}
}