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/**
* @file daemon/opd_ibs.c
* AMD Family10h Instruction Based Sampling (IBS) handling.
*
* @remark Copyright 2007-2010 OProfile authors
* @remark Read the file COPYING
*
* @author Jason Yeh <jason.yeh@amd.com>
* @author Paul Drongowski <paul.drongowski@amd.com>
* @author Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
* Copyright (c) 2008 Advanced Micro Devices, Inc.
*/
#include "op_hw_config.h"
#include "op_events.h"
#include "op_string.h"
#include "op_hw_specific.h"
#include "op_libiberty.h"
#include "opd_printf.h"
#include "opd_trans.h"
#include "opd_events.h"
#include "opd_kernel.h"
#include "opd_anon.h"
#include "opd_sfile.h"
#include "opd_interface.h"
#include "opd_mangling.h"
#include "opd_extended.h"
#include "opd_ibs.h"
#include "opd_ibs_trans.h"
#include "opd_ibs_macro.h"
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
extern op_cpu cpu_type;
extern int no_event_ok;
extern int sfile_equal(struct sfile const * sf, struct sfile const * sf2);
extern void sfile_dup(struct sfile * to, struct sfile * from);
extern char * session_dir;
/* IBS Select Counters */
static unsigned int ibs_selected_size;
/* These flags store the IBS-derived events selection. */
static unsigned int ibs_fetch_selected_flag;
static unsigned int ibs_op_selected_flag;
static unsigned int ibs_op_ls_selected_flag;
static unsigned int ibs_op_nb_selected_flag;
/* IBS Statistics */
static unsigned long ibs_fetch_sample_stats;
static unsigned long ibs_fetch_incomplete_stats;
static unsigned long ibs_op_sample_stats;
static unsigned long ibs_op_incomplete_stats;
static unsigned long ibs_derived_event_stats;
/*
* IBS Virtual Counter
*/
struct opd_event ibs_vc[OP_MAX_IBS_COUNTERS];
/* IBS Virtual Counter Index(VCI) Map*/
unsigned int ibs_vci_map[OP_MAX_IBS_COUNTERS];
/* CPUID information */
unsigned int ibs_family;
unsigned int ibs_model;
unsigned int ibs_stepping;
/* IBS Extended MSRs */
static unsigned long ibs_bta_enabled;
/* IBS log files */
FILE * memaccess_log;
FILE * bta_log;
/**
* This function converts IBS fetch event flags and values into
* derived events. If the tagged (sampled) fetched caused a derived
* event, the derived event is tallied.
*/
static void opd_log_ibs_fetch(struct transient * trans)
{
struct ibs_fetch_sample * trans_fetch = ((struct ibs_sample*)(trans->ext))->fetch;
if (!trans_fetch)
return;
trans_ibs_fetch(trans, ibs_fetch_selected_flag);
}
/**
* This function translates the IBS op event flags and values into
* IBS op derived events. If an op derived event occured, it's tallied.
*/
static void opd_log_ibs_op(struct transient * trans)
{
struct ibs_op_sample * trans_op = ((struct ibs_sample*)(trans->ext))->op;
if (!trans_op)
return;
trans_ibs_op_mask_reserved(ibs_family, trans);
if (trans_ibs_op_rip_invalid(trans) != 0)
return;
trans_ibs_op(trans, ibs_op_selected_flag);
trans_ibs_op_ls(trans, ibs_op_ls_selected_flag);
trans_ibs_op_nb(trans, ibs_op_nb_selected_flag);
trans_ibs_op_ls_memaccess(trans);
trans_ibs_op_bta(trans);
}
static void opd_put_ibs_sample(struct transient * trans)
{
unsigned long long event = 0;
struct kernel_image * k_image = NULL;
struct ibs_fetch_sample * trans_fetch = ((struct ibs_sample*)(trans->ext))->fetch;
if (!enough_remaining(trans, 1)) {
trans->remaining = 0;
return;
}
/* IBS can generate samples with invalid dcookie and
* in kernel address range. Map such samples to vmlinux
* only if the user either specifies a range, or vmlinux.
*/
if (trans->cookie == INVALID_COOKIE
&& (k_image = find_kernel_image(trans)) != NULL
&& (k_image->start != 0 && k_image->end != 0)
&& trans->in_kernel == 0)
trans->in_kernel = 1;
if (trans->tracing != TRACING_ON)
trans->event = event;
/* sfile can change at each sample for kernel */
if (trans->in_kernel != 0)
clear_trans_current(trans);
if (!trans->in_kernel && trans->cookie == NO_COOKIE)
trans->anon = find_anon_mapping(trans);
/* get the current sfile if needed */
if (!trans->current)
trans->current = sfile_find(trans);
/*
* can happen if kernel sample falls through the cracks, or if
* it's a sample from an anon region we couldn't find
*/
if (!trans->current)
goto out;
if (trans_fetch)
opd_log_ibs_fetch(trans);
else
opd_log_ibs_op(trans);
out:
/* switch to trace mode */
if (trans->tracing == TRACING_START)
trans->tracing = TRACING_ON;
update_trans_last(trans);
}
static void get_ibs_bta_status()
{
FILE * fp = NULL;
char buf[PATH_MAX];
/* Default to disable */
ibs_bta_enabled = 0;
snprintf(buf, PATH_MAX, "/dev/oprofile/ibs_op/branch_target");
fp = fopen(buf, "r");
if (!fp)
return;
while (fgets(buf, PATH_MAX, fp) != NULL)
ibs_bta_enabled = strtoul(buf, NULL, 10);
fclose(fp);
}
void code_ibs_fetch_sample(struct transient * trans)
{
struct ibs_fetch_sample * trans_fetch = NULL;
if (!enough_remaining(trans, 7)) {
verbprintf(vext, "not enough remaining\n");
trans->remaining = 0;
ibs_fetch_incomplete_stats++;
return;
}
ibs_fetch_sample_stats++;
trans->ext = xmalloc(sizeof(struct ibs_sample));
((struct ibs_sample*)(trans->ext))->fetch = xmalloc(sizeof(struct ibs_fetch_sample));
trans_fetch = ((struct ibs_sample*)(trans->ext))->fetch;
trans_fetch->rip = pop_buffer_value(trans);
trans_fetch->ibs_fetch_lin_addr_low = pop_buffer_value(trans);
trans_fetch->ibs_fetch_lin_addr_high = pop_buffer_value(trans);
trans_fetch->ibs_fetch_ctl_low = pop_buffer_value(trans);
trans_fetch->ibs_fetch_ctl_high = pop_buffer_value(trans);
trans_fetch->ibs_fetch_phys_addr_low = pop_buffer_value(trans);
trans_fetch->ibs_fetch_phys_addr_high = pop_buffer_value(trans);
verbprintf(vsamples,
"FETCH_X CPU:%ld PID:%ld RIP:%lx CTL_H:%x LAT:%d P_HI:%x P_LO:%x L_HI:%x L_LO:%x\n",
trans->cpu,
(long)trans->tgid,
trans_fetch->rip,
(trans_fetch->ibs_fetch_ctl_high >> 16) & 0x3ff,
(trans_fetch->ibs_fetch_ctl_high) & 0xffff,
trans_fetch->ibs_fetch_phys_addr_high,
trans_fetch->ibs_fetch_phys_addr_low,
trans_fetch->ibs_fetch_lin_addr_high,
trans_fetch->ibs_fetch_lin_addr_low) ;
/* Overwrite the trans->pc with the more accurate trans_fetch->rip */
trans->pc = trans_fetch->rip;
opd_put_ibs_sample(trans);
free(trans_fetch);
free(trans->ext);
trans->ext = NULL;
}
static void get_ibs_op_bta_sample(struct transient * trans,
struct ibs_op_sample * trans_op)
{
// Check remaining
if (!enough_remaining(trans, 2)) {
verbprintf(vext, "not enough remaining\n");
trans->remaining = 0;
ibs_op_incomplete_stats++;
return;
}
if (ibs_bta_enabled == 1) {
trans_op->ibs_op_brtgt_addr = pop_buffer_value(trans);
// Check if branch target address is valid (MSRC001_1035[37] == 1]
if ((trans_op->ibs_op_data1_high & (0x00000001 << 5)) == 0) {
trans_op->ibs_op_brtgt_addr = 0;
}
} else {
trans_op->ibs_op_brtgt_addr = 0;
}
}
void code_ibs_op_sample(struct transient * trans)
{
struct ibs_op_sample * trans_op= NULL;
if (!enough_remaining(trans, 13)) {
verbprintf(vext, "not enough remaining\n");
trans->remaining = 0;
ibs_op_incomplete_stats++;
return;
}
ibs_op_sample_stats++;
trans->ext = xmalloc(sizeof(struct ibs_sample));
((struct ibs_sample*)(trans->ext))->op = xmalloc(sizeof(struct ibs_op_sample));
trans_op = ((struct ibs_sample*)(trans->ext))->op;
trans_op->rip = pop_buffer_value(trans);
trans_op->ibs_op_lin_addr_low = pop_buffer_value(trans);
trans_op->ibs_op_lin_addr_high = pop_buffer_value(trans);
trans_op->ibs_op_data1_low = pop_buffer_value(trans);
trans_op->ibs_op_data1_high = pop_buffer_value(trans);
trans_op->ibs_op_data2_low = pop_buffer_value(trans);
trans_op->ibs_op_data2_high = pop_buffer_value(trans);
trans_op->ibs_op_data3_low = pop_buffer_value(trans);
trans_op->ibs_op_data3_high = pop_buffer_value(trans);
trans_op->ibs_op_ldst_linaddr_low = pop_buffer_value(trans);
trans_op->ibs_op_ldst_linaddr_high = pop_buffer_value(trans);
trans_op->ibs_op_phys_addr_low = pop_buffer_value(trans);
trans_op->ibs_op_phys_addr_high = pop_buffer_value(trans);
get_ibs_op_bta_sample(trans, trans_op);
verbprintf(vsamples,
"IBS_OP_X CPU:%ld PID:%d RIP:%lx D1HI:%x D1LO:%x D2LO:%x D3HI:%x D3LO:%x L_LO:%x P_LO:%x\n",
trans->cpu,
trans->tgid,
trans_op->rip,
trans_op->ibs_op_data1_high,
trans_op->ibs_op_data1_low,
trans_op->ibs_op_data2_low,
trans_op->ibs_op_data3_high,
trans_op->ibs_op_data3_low,
trans_op->ibs_op_ldst_linaddr_low,
trans_op->ibs_op_phys_addr_low);
/* Overwrite the trans->pc with the more accurate trans_op->rip */
trans->pc = trans_op->rip;
opd_put_ibs_sample(trans);
free(trans_op);
free(trans->ext);
trans->ext = NULL;
}
/** Convert IBS event to value used for data structure indexing */
static unsigned long ibs_event_to_counter(unsigned long x)
{
unsigned long ret = ~0UL;
if (IS_IBS_FETCH(x))
ret = (x - IBS_FETCH_BASE);
else if (IS_IBS_OP(x))
ret = (x - IBS_OP_BASE + IBS_FETCH_MAX);
else if (IS_IBS_OP_LS(x))
ret = (x - IBS_OP_LS_BASE + IBS_OP_MAX + IBS_FETCH_MAX);
else if (IS_IBS_OP_NB(x))
ret = (x - IBS_OP_NB_BASE + IBS_OP_LS_MAX + IBS_OP_MAX + IBS_FETCH_MAX);
return (ret != ~0UL) ? ret + OP_MAX_COUNTERS : ret;
}
void opd_log_ibs_event(unsigned int event,
struct transient * trans)
{
ibs_derived_event_stats++;
trans->event = event;
sfile_log_sample_count(trans, 1);
}
void opd_log_ibs_count(unsigned int event,
struct transient * trans,
unsigned int count)
{
ibs_derived_event_stats++;
trans->event = event;
sfile_log_sample_count(trans, count);
}
static unsigned long get_ibs_vci_key(unsigned int event)
{
unsigned long key = ibs_event_to_counter(event);
if (key == ~0UL || key < OP_MAX_COUNTERS)
return ~0UL;
key = key - OP_MAX_COUNTERS;
return key;
}
static int ibs_parse_and_set_events(char * str)
{
char * tmp, * ptr, * tok1, * tok2 = NULL;
int is_done = 0;
struct op_event * event = NULL;
op_cpu cpu_type = CPU_NO_GOOD;
unsigned long key;
if (!str)
return -1;
cpu_type = op_get_cpu_type();
op_events(cpu_type);
tmp = op_xstrndup(str, strlen(str));
ptr = tmp;
while (is_done != 1
&& (tok1 = strtok_r(ptr, ",", &tok2)) != NULL) {
if ((ptr = strstr(tok1, ":")) != NULL) {
*ptr = '\0';
is_done = 1;
}
// Resove event number
event = find_event_by_name(tok1, 0, 0);
if (!event)
return -1;
// Grouping
if (IS_IBS_FETCH(event->val)) {
ibs_fetch_selected_flag |= 1 << IBS_FETCH_OFFSET(event->val);
} else if (IS_IBS_OP(event->val)) {
ibs_op_selected_flag |= 1 << IBS_OP_OFFSET(event->val);
} else if (IS_IBS_OP_LS(event->val)) {
ibs_op_ls_selected_flag |= 1 << IBS_OP_LS_OFFSET(event->val);
} else if (IS_IBS_OP_NB(event->val)) {
ibs_op_nb_selected_flag |= 1 << IBS_OP_NB_OFFSET(event->val);
} else {
return -1;
}
key = get_ibs_vci_key(event->val);
if (key == ~0UL)
return -1;
ibs_vci_map[key] = ibs_selected_size;
/* Initialize part of ibs_vc */
ibs_vc[ibs_selected_size].name = tok1;
ibs_vc[ibs_selected_size].value = event->val;
ibs_vc[ibs_selected_size].counter = ibs_selected_size + OP_MAX_COUNTERS;
ibs_vc[ibs_selected_size].kernel = 1;
ibs_vc[ibs_selected_size].user = 1;
ibs_selected_size++;
ptr = NULL;
}
return 0;
}
static int ibs_parse_counts(char * str, unsigned long int * count)
{
char * tmp, * tok1, * tok2 = NULL, *end = NULL;
if (!str)
return -1;
tmp = op_xstrndup(str, strlen(str));
tok1 = strtok_r(tmp, ":", &tok2);
if (tok1) {
*count = strtoul(tok1, &end, 10);
} else {
fprintf(stderr, "Invalid count specification in %s\n", str);
return -1;
}
if ((end && *end) || *count == 0
|| errno == EINVAL || errno == ERANGE) {
fprintf(stderr,"Invalid count (%s)\n", str);
return -1;
}
return 0;
}
static int ibs_parse_and_set_um_fetch(char const * str)
{
if (!str)
return -1;
return 0;
}
static int ibs_parse_and_set_um_op(char const * str, unsigned long int * ibs_op_um)
{
char * end = NULL;
if (!str)
return -1;
*ibs_op_um = strtoul(str, &end, 16);
if ((end && *end) || errno == EINVAL || errno == ERANGE) {
fprintf(stderr,"Invalid unitmaks (%s)\n", str);
return -1;
}
return 0;
}
static void check_cpuid_family_model_stepping()
{
#if defined(__i386__) || defined(__x86_64__)
unsigned eax = cpuid_signature();
ibs_family = cpu_family(eax);
ibs_model = cpu_model(eax);
ibs_stepping = cpu_stepping(eax);
#else
ibs_family = 0;
ibs_model = 0;
ibs_stepping = 0;
#endif
}
static int ibs_init(char const * argv)
{
char * tmp, * ptr, * tok1, * tok2 = NULL;
unsigned int i = 0;
unsigned long int ibs_fetch_count = 0;
unsigned long int ibs_op_count = 0;
unsigned long int ibs_op_um = 0;
if (!argv)
return -1;
if (empty_line(argv) != 0)
return -1;
tmp = op_xstrndup(argv, strlen(argv));
ptr = (char *) skip_ws(tmp);
// "fetch:event1,event2,....:count:um|op:event1,event2,.....:count:um"
tok1 = strtok_r(ptr, "|", &tok2);
while (tok1 != NULL) {
if (!strncmp("fetch:", tok1, strlen("fetch:"))) {
// Get to event section
tok1 = tok1 + strlen("fetch:");
if (ibs_parse_and_set_events(tok1) == -1)
return -1;
// Get to count section
while (tok1) {
if (*tok1 == '\0')
return -1;
if (*tok1 != ':') {
tok1++;
} else {
tok1++;
break;
}
}
if (ibs_parse_counts(tok1, &ibs_fetch_count) == -1)
return -1;
// Get to um section
while (tok1) {
if (*tok1 == '\0')
return -1;
if (*tok1 != ':') {
tok1++;
} else {
tok1++;
break;
}
}
if (ibs_parse_and_set_um_fetch(tok1) == -1)
return -1;
} else if (!strncmp("op:", tok1, strlen("op:"))) {
// Get to event section
tok1 = tok1 + strlen("op:");
if (ibs_parse_and_set_events(tok1) == -1)
return -1;
// Get to count section
while (tok1) {
if (*tok1 == '\0')
return -1;
if (*tok1 != ':') {
tok1++;
} else {
tok1++;
break;
}
}
if (ibs_parse_counts(tok1, &ibs_op_count) == -1)
return -1;
// Get to um section
while (tok1) {
if (*tok1 == '\0')
return -1;
if (*tok1 != ':') {
tok1++;
} else {
tok1++;
break;
}
}
if (ibs_parse_and_set_um_op(tok1, &ibs_op_um))
return -1;
} else
return -1;
tok1 = strtok_r(NULL, "|", &tok2);
}
/* Initialize ibs_vc */
for (i = 0 ; i < ibs_selected_size ; i++)
{
if (IS_IBS_FETCH(ibs_vc[i].value)) {
ibs_vc[i].count = ibs_fetch_count;
ibs_vc[i].um = 0;
} else {
ibs_vc[i].count = ibs_op_count;
ibs_vc[i].um = ibs_op_um;
}
}
// Allow no event
no_event_ok = 1;
check_cpuid_family_model_stepping();
get_ibs_bta_status();
/* Create IBS memory access log */
memaccess_log = NULL;
if (ibs_op_um & 0x2) {
char filename[PATH_MAX];
char * log_file = "/samples/ibs_memaccess.log";
size_t path_len = strlen(session_dir) + strlen(log_file);
if (path_len < PATH_MAX) {
strcpy(filename, session_dir);
strcat(filename, log_file);
memaccess_log = fopen(filename, "w");
}
if ( memaccess_log == NULL) {
verbprintf(vext, "Warning: Cannot create ibs_memaccess.log\n");
} else {
fprintf (memaccess_log, "# IBS Memory Access Log\n\n");
fprintf (memaccess_log, "# Format: app_cookie,cookie,cpu,tgid,tid,pc,branch-target-address,\n");
fprintf (memaccess_log, "# phy-hi:phy-low,lin-hi:lin-low,accese-type,latency\n\n");
}
}
// Create IBS Branch Target Address (BTA) log
bta_log = NULL;
if (ibs_bta_enabled) {
char filename[PATH_MAX];
char * log_file = "/samples/ibs_bta.log";
size_t path_len = strlen(session_dir) + strlen(log_file);
if (path_len < PATH_MAX) {
strcpy(filename, session_dir);
strcat(filename, log_file);
bta_log = fopen(filename, "w");
}
if ( bta_log == NULL) {
verbprintf(vext, "Warning: Cannot create ibs_bta.log\n");
} else {
fprintf (bta_log, "# IBS Memory Access Log\n\n");
fprintf (bta_log, "# Format: app_cookie,cookie,cpu,tgid,tid,pc,branch-target-address\n\n");
}
}
return 0;
}
static int ibs_deinit()
{
if (memaccess_log) {
fclose (memaccess_log);
memaccess_log = NULL;
}
if (bta_log) {
fclose (bta_log);
bta_log = NULL;
}
return 0;
}
static int ibs_print_stats()
{
printf("Nr. IBS Fetch samples : %lu (%lu entries)\n",
ibs_fetch_sample_stats, (ibs_fetch_sample_stats * 7));
printf("Nr. IBS Fetch incompletes : %lu\n", ibs_fetch_incomplete_stats);
printf("Nr. IBS Op samples : %lu (%lu entries)\n",
ibs_op_sample_stats, (ibs_op_sample_stats * 13));
printf("Nr. IBS Op incompletes : %lu\n", ibs_op_incomplete_stats);
printf("Nr. IBS derived events : %lu\n", ibs_derived_event_stats);
return 0;
}
static int ibs_sfile_create(struct sfile * sf)
{
unsigned int i;
sf->ext_files = xmalloc(ibs_selected_size * sizeof(odb_t));
for (i = 0 ; i < ibs_selected_size ; ++i)
odb_init(&sf->ext_files[i]);
return 0;
}
static int ibs_sfile_dup (struct sfile * to, struct sfile * from)
{
unsigned int i;
if (from->ext_files != NULL) {
to->ext_files = xmalloc(ibs_selected_size * sizeof(odb_t));
for (i = 0 ; i < ibs_selected_size ; ++i)
odb_init(&to->ext_files[i]);
} else {
to->ext_files = NULL;
}
return 0;
}
static int ibs_sfile_close(struct sfile * sf)
{
unsigned int i;
if (sf->ext_files != NULL) {
for (i = 0; i < ibs_selected_size ; ++i)
odb_close(&sf->ext_files[i]);
free(sf->ext_files);
sf->ext_files= NULL;
}
return 0;
}
static int ibs_sfile_sync(struct sfile * sf)
{
unsigned int i;
if (sf->ext_files != NULL) {
for (i = 0; i < ibs_selected_size ; ++i)
odb_sync(&sf->ext_files[i]);
}
return 0;
}
static odb_t * ibs_sfile_get(struct transient const * trans, int is_cg)
{
struct sfile * sf = trans->current;
struct sfile * last = trans->last;
struct cg_entry * cg;
struct list_head * pos;
unsigned long hash;
odb_t * file;
unsigned long counter, ibs_vci, key;
/* Note: "trans->event" for IBS is not the same as traditional
* events. Here, it has the actual event (0xfxxx), while the
* traditional event has the event index.
*/
key = get_ibs_vci_key(trans->event);
if (key == ~0UL) {
fprintf(stderr, "%s: Invalid IBS event %lu\n", __func__, trans->event);
abort();
}
ibs_vci = ibs_vci_map[key];
counter = ibs_vci + OP_MAX_COUNTERS;
/* Creating IBS sfile if it not already exists */
if (sf->ext_files == NULL)
ibs_sfile_create(sf);
file = &(sf->ext_files[ibs_vci]);
if (!is_cg)
goto open;
hash = last->hashval & (CG_HASH_SIZE - 1);
/* Need to look for the right 'to'. Since we're looking for
* 'last', we use its hash.
*/
list_for_each(pos, &sf->cg_hash[hash]) {
cg = list_entry(pos, struct cg_entry, hash);
if (sfile_equal(last, &cg->to)) {
file = &(cg->to.ext_files[ibs_vci]);
goto open;
}
}
cg = xmalloc(sizeof(struct cg_entry));
sfile_dup(&cg->to, last);
list_add(&cg->hash, &sf->cg_hash[hash]);
file = &(cg->to.ext_files[ibs_vci]);
open:
if (!odb_open_count(file))
opd_open_sample_file(file, last, sf, counter, is_cg);
/* Error is logged by opd_open_sample_file */
if (!odb_open_count(file))
return NULL;
return file;
}
/** Filled opd_event structure with IBS derived event information
* from the given counter value.
*/
static struct opd_event * ibs_sfile_find_counter_event(unsigned long counter)
{
unsigned long ibs_vci;
if (counter >= OP_MAX_COUNTERS + OP_MAX_IBS_COUNTERS
|| counter < OP_MAX_COUNTERS) {
fprintf(stderr,"Error: find_ibs_counter_event : "
"invalid counter value %lu.\n", counter);
abort();
}
ibs_vci = counter - OP_MAX_COUNTERS;
return &ibs_vc[ibs_vci];
}
struct opd_ext_sfile_handlers ibs_sfile_handlers =
{
.create = &ibs_sfile_create,
.dup = &ibs_sfile_dup,
.close = &ibs_sfile_close,
.sync = &ibs_sfile_sync,
.get = &ibs_sfile_get,
.find_counter_event = &ibs_sfile_find_counter_event
};
struct opd_ext_handlers ibs_handlers =
{
.ext_init = &ibs_init,
.ext_deinit = &ibs_deinit,
.ext_print_stats = &ibs_print_stats,
.ext_sfile = &ibs_sfile_handlers
};