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5dcdb2bf569ba5cf7f63ef682fc0bb106934cde4
xen/tools/misc/gtraceview.c
T
Matthew Daley c07134ccca tools: remove unnecessary null pointer checks before frees 
Patch generated by the following semantic patch
(http://coccinelle.lip6.fr/):

@@
expression *P;
@@

- if(P) free(P);
+ free(P);

...and then by filtering through the following command:

filterdiff -p1 -x 'stubdom/*' -x 'tools/firmware/*' -x 'tools/qemu-*' -x 'tools/blktap*'

Signed-off-by: Matthew Daley <mattjd@gmail.com>
Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
2013-10-31 20:04:25 +00:00

1115 lines
31 KiB
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/*
* gtraceview.c: list Cx events in a ncurse way to help find abnormal behaviour.
* Copyright (c) 2009, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*/
/* Include output from configure */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <xenctrl.h>
#include <xen/trace.h>
/* get curses header from configure */
#include INCLUDE_CURSES_H
/********** MACROS **********/
#define MAX_CPU_NR 32
#define MAX_MODE_NR 16
#define MAX_STRING_LEN 1024
/********** STRUCTURE DEFINITIONS **********/
enum {
FLAG_FUZZY = 0,
FLAG_LEVEL,
FLAG_EDGE,
FLAG_UNKNOWN,
NR_FLAGS
};
struct string {
int len;
char str[MAX_STRING_LEN+1];
};
int num_of_cpus(void);
void string_nr_addch(struct string *str, int nr, char ch)
{
int i;
for (i = 0; i < nr; i++)
str->str[str->len++] = ch;
str->str[str->len] = '\0';
}
int string_print(struct string *str, char *fmt, ...)
{
va_list ap;
int l = 0;
va_start(ap, fmt);
l = vsprintf(str->str + str->len, fmt, ap);
va_end(ap);
str->len += l;
str->str[str->len] = '\0';
return l;
}
struct cpu {
unsigned char cx;
// unsigned char cx_prev;
unsigned char flag;
unsigned char irqs[4];
unsigned int expected;
unsigned int predicted;
};
struct state {
uint64_t tsc;
struct cpu cpu[MAX_CPU_NR];
};
struct mode {
const char *name;
int offset;
int width;
int row;
int scroll_h;
struct state *state;
int state_nr;
uint64_t time_scale;
uint64_t start_time;
int cpu_bitmap[MAX_CPU_NR];
int initialized;
int (*init)(void);
void (*show)(void);
void (*exit)(void);
};
/* simplified xentrace record */
struct rec {
uint64_t tsc;
int cpu;
unsigned int expected;
unsigned int predicted;
unsigned char cx;
unsigned char irqs[4];
};
/********** FORWARD DECLARATION **********/
void show_help(void);
void show_version(void);
int load_file(char *fname);
void crt_init(void);
int mode_init(void);
void mode_show(void);
/* event mode handler */
int event_mode_init(void);
void event_mode_show(void);
void event_mode_exit(void);
/* time mode handler */
int time_mode_init(void);
int time_mode_rebuild(uint64_t start_time, uint64_t time_scale);
/********** GLOBAL VARIABLES **********/
/* store simplified xentrace data */
struct rec *data;
int64_t data_nr, data_cur;
/* store max cx state number and cpu number */
int max_cx_num = -1, max_cpu_num = -1;
int is_irq_enabled = -1;
int is_menu_gov_enabled = -1;
int is_link = 0;
uint64_t tsc2us = 2793UL;
struct rec *data_evt;
struct rec *evt[MAX_CPU_NR];
int evt_len[MAX_CPU_NR];
int cur_row = 0;
struct mode modes[] = {
{
.name = "Event",
.init = event_mode_init,
.show = event_mode_show,
.exit = event_mode_exit,
},
{
.name = "Time",
.init = time_mode_init,
/* use the same show and exit with event mode */
.show = event_mode_show,
.exit = event_mode_exit,
},
};
struct mode *this = NULL;
/* hand-crafted min() */
static inline int min(int a, int b)
{
return a < b ? a : b;
}
#define MIN(a, b) ((a) < (b) ? (a) : (b))
void choose_cpus(void);
void help_screen(void);
int main(int argc, char *argv[])
{
char *fname = NULL;
int arg;
int quit = 0;
uint64_t s_time = 0;
uint64_t last_tsc = 0;
for (arg = 1; arg < argc; arg++) {
if (!strcmp(argv[arg], "--version")) {
show_version();
exit(EXIT_SUCCESS);
} else if (!strcmp(argv[arg], "--help")) {
show_help();
exit(EXIT_SUCCESS);
} else {
/* assume it's a file */
fname = argv[arg];
break;
}
}
if (!fname) {
show_help();
exit(EXIT_FAILURE);
}
if (load_file(fname))
exit(EXIT_FAILURE);
if (!data_cur) {
fprintf(stderr, "file %s doesn't contain any valid record\n", fname);
exit(EXIT_FAILURE);
}
if (mode_init())
exit(EXIT_FAILURE);
crt_init();
cur_row = 1;
this = &modes[0];
while (!quit) {
int ch;
clear();
this->show();
ch = getch();
switch (ch) {
case '!':
is_link = !is_link;
break;
case 'u':
move(LINES-1, 0);
clrtoeol();
printw("us = ? TSCs (default: 2793):");
echo();
curs_set(1);
scanw("%"PRIu64, &tsc2us);
curs_set(0);
noecho();
if (tsc2us <= 0)
tsc2us = 2793UL;
break;
case '/':
move(LINES-1, 0);
clrtoeol();
printw("Input start time:");
echo();
curs_set(1);
scanw("%"PRIu64, &s_time);
curs_set(0);
noecho();
if (s_time >= this->state[0].tsc &&
s_time <= this->state[this->state_nr-1].tsc) {
int i = 0;
while (i < this->state_nr &&
this->state[i].tsc < s_time)
i++;
this->row = i;
cur_row = 1;
}
break;
case '+':
if (!strcmp(this->name, "Time")) {
this->time_scale -= this->time_scale/10;
this->start_time = this->state[this->row+cur_row-1].tsc - (cur_row-1)*this->time_scale;
if (this->start_time < data[0].tsc)
this->start_time = data[0].tsc;
time_mode_rebuild(this->start_time, this->time_scale);
}
break;
case '-':
if (!strcmp(this->name, "Time")) {
this->time_scale += this->time_scale/10;
this->start_time = this->state[this->row+cur_row-1].tsc - (cur_row-1)*this->time_scale;
if (this->start_time < data[0].tsc)
this->start_time = data[0].tsc;
time_mode_rebuild(this->start_time, this->time_scale);
}
break;
case KEY_RESIZE:
break;
case KEY_UP:
if (--cur_row < 1) {
cur_row = 1;
if (--this->row < 0)
this->row = 0;
}
break;
case KEY_DOWN:
if (++cur_row > LINES-2) {
cur_row = LINES-2;
this->row = min(this->state_nr-LINES+2, this->row+1);
}
break;
case KEY_LEFT:
this->scroll_h -= 3;
if (this->scroll_h < 0)
this->scroll_h = 0;
break;
case KEY_RIGHT:
this->scroll_h += 3;
if (this->scroll_h >= this->width*num_of_cpus())
this->scroll_h = this->width*num_of_cpus();
break;
case KEY_HOME:
cur_row = 1;
this->row = 0;
break;
case KEY_END:
cur_row = LINES-2;
this->row = this->state_nr-LINES+2;
break;
case KEY_NPAGE:
this->row = min(this->state_nr-LINES+2, this->row+20);
break;
case KEY_PPAGE:
if (this->row >= 20)
this->row -= 20;
break;
case KEY_F(2):
/* change to another mode */
if (is_link)
last_tsc = this->state[this->row+cur_row-1].tsc;
if (this == &modes[sizeof(modes)/sizeof(modes[0])-1])
this = &modes[0];
else
this++;
clear();
if (is_link) {
if (!strcmp(this->name, "Time")) {
this->start_time = last_tsc - (cur_row-1)*this->time_scale;
if (this->start_time < data[0].tsc)
this->start_time = data[0].tsc;
time_mode_rebuild(this->start_time, this->time_scale);
} else if (!strcmp(this->name, "Event")) {
int x;
for (x = 0; x < this->state_nr && this->state[x].tsc < last_tsc; x++)
;
this->row = x-(cur_row-1);
}
}
break;
case KEY_F(3):
if (!strcmp(this->name, "Time")) {
/* only meaningful in Time mode */
move(LINES-1, 0);
clrtoeol();
printw("Input time scale and start time:");
echo();
curs_set(1);
scanw("%"PRIu64" %"PRIu64,
&this->time_scale, &this->start_time);
curs_set(0);
noecho();
time_mode_rebuild(this->start_time,
this->time_scale);
}
break;
case KEY_F(4):
/* quit */
quit = 1;
break;
case KEY_F(5):
/* choose which CPUs to display */
choose_cpus();
break;
case 'h':
help_screen();
break;
}
}
exit(EXIT_SUCCESS);
}
/* used for qsort() */
static int evt_data_cmp(const void *_a, const void *_b)
{
struct rec *a = (struct rec *)_a;
struct rec *b = (struct rec *)_b;
if (a->cpu == b->cpu)
return a->tsc > b->tsc ? 1 : -1;
return a->cpu > b->cpu ? 1 : -1;
}
static int data_cmp(const void *_a, const void *_b)
{
struct rec *a = (struct rec *)_a;
struct rec *b = (struct rec *)_b;
return a->tsc > b->tsc ? 1 : -1;
}
/* load file and make them a list of records
* update these following variables:
* data, data_cur, data_nr
* max_cpu_num, max_cx_num
*/
int load_file(char *fname)
{
/* file descriptor for raw xentrace file */
int fd;
/* current cpu during xentrace data parse */
int cur_cpu = -1;
int i;
fd = open(fname, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "file %s cannot open\n", fname);
return 1;
}
/* the initial number is 1024,
* and when it overflows, this number doubles.
*/
data_nr = 1024;
data_cur = 0;
data = malloc(sizeof(struct rec) * data_nr);
if (!data) {
fprintf(stderr, "not enough memory\n");
close(fd);
return 1;
}
while (1) {
struct t_rec rec;
ssize_t ret, size;
ret = read(fd, &rec, sizeof(uint32_t));
if (!ret)
break;
if (ret != sizeof(uint32_t)) {
fprintf(stderr, "reading header error\n");
break;
}
size = 0;
if (rec.cycles_included)
size += sizeof(uint64_t);
size += sizeof(uint32_t) * rec.extra_u32;
ret = read(fd, (char *)&rec + sizeof(uint32_t), size);
if (!ret && size)
break;
if (ret != size) {
fprintf(stderr, "reading data error\n");
break;
}
if (rec.event == 0x1f003) {
/* cpu change event */
cur_cpu = 0;
if (rec.extra_u32 > 0)
cur_cpu = rec.u.nocycles.extra_u32[0];
continue;
} else if (!rec.cycles_included ||
(rec.event != TRC_PM_IDLE_ENTRY &&
rec.event != TRC_PM_IDLE_EXIT &&
rec.event != TRC_PM_FREQ_CHANGE)) {
continue;
}
/* add one record */
if (data_cur == data_nr) {
data_nr <<= 1;
if (data_nr < 0) {
fprintf(stderr, "too many entries\n");
close(fd);
return 1;
}
data = realloc(data, sizeof(struct rec) * data_nr);
if (!data) {
fprintf(stderr, "not enough memory\n");
close(fd);
return 1;
}
}
data[data_cur].tsc = rec.u.cycles.cycles_hi;
data[data_cur].tsc <<= 32;
data[data_cur].tsc |= rec.u.cycles.cycles_lo;
data[data_cur].cpu = cur_cpu;
/* extra_u32[1] is omitted, as it's pm ticks. */
if (rec.event == TRC_PM_IDLE_ENTRY) {
data[data_cur].cx = rec.u.cycles.extra_u32[0];
if (rec.extra_u32 >= 4) {
data[data_cur].expected = rec.u.cycles.extra_u32[2];
data[data_cur].predicted = rec.u.cycles.extra_u32[3];
is_menu_gov_enabled = 1;
} else
is_menu_gov_enabled = 0;
} else if (rec.event == TRC_PM_IDLE_EXIT) {
/* IDLE_EXIT default to C0 */
data[data_cur].cx = 0;
/* store the reasons why it exits */
if (rec.extra_u32 == 6) {
data[data_cur].irqs[0] = rec.u.cycles.extra_u32[2];
data[data_cur].irqs[1] = rec.u.cycles.extra_u32[3];
data[data_cur].irqs[2] = rec.u.cycles.extra_u32[4];
data[data_cur].irqs[3] = rec.u.cycles.extra_u32[5];
is_irq_enabled = 1;
} else
is_irq_enabled = 0;
} else {
/* FREQ CHANGE */
}
/* update max info */
if (data[data_cur].cx > max_cx_num)
max_cx_num = data[data_cur].cx;
if (data[data_cur].cpu > max_cpu_num)
max_cpu_num = data[data_cur].cpu;
data_cur++;
}
close(fd);
data_evt = malloc(sizeof(struct rec) * data_cur);
memcpy(data_evt, data, sizeof(struct rec) * data_cur);
qsort(data_evt, data_cur, sizeof(struct rec), evt_data_cmp);
for (i = 0; i < max_cpu_num; i++) {
evt_len[i] = 0;
evt[i] = NULL;
}
for (i = data_cur-1; i >= 0; i--) {
evt[data_evt[i].cpu] = data_evt+i;
evt_len[data_evt[i].cpu]++;
}
/* sort data array according to TSC time line */
qsort(data, data_cur, sizeof(struct rec), data_cmp);
max_cpu_num++;
max_cx_num++;
return 0;
}
void show_version(void)
{
printf("gtraceview - (C) 2009 Intel Corporation\n");
}
void show_help(void)
{
show_version();
printf("gtraceview <trace.data> [--version] [--help]\n");
printf(" trace.data raw data got by "
"'xentrace -e 0x80f000 trace.dat'\n");
printf(" --version show version information\n");
printf(" --help show this message\n");
printf("For more help messages, please press 'h' in the window\n");
}
void crt_done(void)
{
curs_set(1);
endwin();
}
void help_screen(void)
{
clear();
mvprintw(0, 0, " HELP SCREEN");
mvprintw(1, 0, "1. LEFT and RIGHT arrow key to move off-screen outputs");
mvprintw(2, 0, "2. UP and DOWN arrow key to move the highlighted line");
mvprintw(3, 0, "3. F2 to switch between Event and Time mode");
mvprintw(4, 0, "4. '/' to search the TSC stamp");
mvprintw(5, 0, "5. '+' to zoom in and '-' to zoom out");
mvprintw(6, 0, "6. F3 to set start time and time manually");
mvprintw(7, 0, "7. F4 to quit");
mvprintw(8, 0, "8. F5 to select which CPUs we want to see");
mvprintw(9, 0, "9. Irq exit reason shown on Cx exit record (patch needed)");
mvprintw(10, 0, "10. Menu governor criteria shown on bottom line (patch needed)");
mvprintw(11, 0, "11. PAGEDOWN, PAGEUP, HOME and END to navigate");
mvprintw(12, 0, "12. 'h' to show this screen");
mvprintw(13, 0, "13. 'u' to edit how many TSCs is a us unit");
mvprintw(LINES-1, 0, "Press any key to continue...");
getch();
}
void crt_init(void)
{
char *term;
initscr();
noecho();
nonl();
intrflush(stdscr, false);
keypad(stdscr, true);
curs_set(0);
/* hook exit() */
atexit(crt_done);
/* we love colorful screens :-) */
start_color();
init_pair(1, COLOR_BLACK, COLOR_CYAN);
init_pair(2, COLOR_BLACK, COLOR_GREEN);
init_pair(3, COLOR_BLACK, COLOR_RED);
/* some term tunings */
term = getenv("TERM");
if (!strcmp(term, "xterm") ||
!strcmp(term, "xterm-color") ||
!strcmp(term, "vt220")) {
define_key("\033[1~", KEY_HOME);
define_key("\033[4~", KEY_END);
define_key("\033OP", KEY_F(1));
define_key("\033OQ", KEY_F(2));
define_key("\033OR", KEY_F(3));
define_key("\033OS", KEY_F(4));
define_key("\033[11~", KEY_F(1));
define_key("\033[12~", KEY_F(2));
define_key("\033[13~", KEY_F(3));
define_key("\033[14~", KEY_F(4));
define_key("\033[[D", KEY_LEFT);
}
}
void nr_addch(int nr, int ch)
{
int i;
int y, x;
getyx(stdscr, y, x);
for (i = 0; i < nr; i++) {
if (x == COLS-1)
break;
addch(ch);
}
}
int event_mode_init(void)
{
int i, j;
struct state *state;
int index;
struct cpu cur_state[MAX_CPU_NR];
if (this->initialized)
free(this->state);
state = malloc(sizeof(struct state) * data_cur);
if (!state)
return 1;
this->state = state;
this->row = 0;
this->width = 9;
this->offset = 33;
this->scroll_h = 0;
/* otherwise, respect cpu_bitmap[] */
if (!this->initialized) {
this->initialized = 1;
for (i = 0; i < max_cpu_num; i++)
this->cpu_bitmap[i] = 1;
}
for (i = 0; i < max_cpu_num; i++)
if (this->cpu_bitmap[i])
cur_state[i].flag = FLAG_UNKNOWN;
for (i = 0, index = 0; i < data_cur; i++) {
/* data[i] */
int cpu = data[i].cpu;
if (cpu < 0)
continue;
if (!this->cpu_bitmap[cpu])
continue;
/* TODO: use the same structure */
/* copy cx, expected, predicted and irqs */
cur_state[cpu].cx = data[i].cx;
cur_state[cpu].expected = data[i].expected;
cur_state[cpu].predicted = data[i].predicted;
memcpy(cur_state[cpu].irqs, data[i].irqs,
sizeof(unsigned char) * 4);
/* as long as it comes here,
* it means that we have an event.
*/
cur_state[cpu].flag = FLAG_EDGE;
state[index].tsc = data[i].tsc;
for (j = 0; j < max_cpu_num; j++) {
if (!this->cpu_bitmap[j])
continue;
/* copy cx, irqs and flags */
state[index].cpu[j].cx = cur_state[j].cx;
state[index].cpu[j].expected = cur_state[j].expected;
state[index].cpu[j].predicted = cur_state[j].predicted;
memcpy(state[index].cpu[j].irqs, cur_state[j].irqs,
sizeof(unsigned char) * 4);
state[index].cpu[j].flag = cur_state[j].flag;
/* chage flag in cur_state accordingly */
if (cur_state[j].flag == FLAG_EDGE)
cur_state[j].flag = FLAG_LEVEL;
}
index++;
}
this->state_nr = index;
return 0;
}
static inline int len_of_number(uint64_t n)
{
int l = 0;
if (!n)
return 1;
do {
l++;
n /= 10;
} while (n);
return l;
}
static inline void display_number(uint64_t n, int l)
{
static char sym[] = { ' ', 'K', 'M', 'G', 'T' };
int nr = 0;
if (len_of_number(n) <= l) {
nr_addch(l-len_of_number(n), ' ');
printw("%"PRIu64, n);
return;
}
do {
n /= 1000UL;
nr++;
} while (len_of_number(n) > l-1);
nr_addch(l-1-len_of_number(n), ' ');
printw("%"PRIu64, n);
nr_addch(1, sym[nr]);
}
void draw_cpu_state(struct string *s, struct cpu *c, int width)
{
int cx = c->cx;
int flag = c->flag;
switch (flag) {
case FLAG_FUZZY:
string_nr_addch(s, max_cx_num, '#');
string_nr_addch(s, width-max_cx_num, ' ');
break;
case FLAG_UNKNOWN:
string_nr_addch(s, 1, '?');
string_nr_addch(s, width-1, ' ');
break;
case FLAG_LEVEL:
string_nr_addch(s, cx, ' ');
string_nr_addch(s, 1, '|');
string_nr_addch(s, width-1-cx, ' ');
break;
case FLAG_EDGE:
if (cx > 0) {
/* ENTRY */
string_nr_addch(s, 1, '>');
string_nr_addch(s, cx-1, '-');
string_nr_addch(s, 1, '+');
string_nr_addch(s, width-cx-1, ' ');
} else {
/* EXIT */
string_nr_addch(s, 1, '<');
if (is_irq_enabled == 1) {
int k, len = 0;
for (k = 0; k < 4; k++) {
unsigned char irq = c->irqs[k];
if (irq) {
string_print(s, "%02x", irq);
len += 2;
}
}
if (len > 0)
string_nr_addch(s, width-len-1, ' ');
else {
string_print(s, "noirq");
string_nr_addch(s, width-1-5, ' ');
}
} else {
string_nr_addch(s, 1, '-');
string_nr_addch(s, width-2, ' ');
}
}
break;
}
}
void event_mode_show(void)
{
struct state *state = this->state;
struct string s;
int idx = this->row;
int idx_hl = 0;
int i, j, l;
/* draw headline */
s.len = 0;
move(0, 0);
attron(COLOR_PAIR(2));
nr_addch(this->offset, ' ');
for (i = 0; i < max_cpu_num; i++) {
if (this->cpu_bitmap[i]) {
string_print(&s, "CPU%d", i);
string_nr_addch(&s, this->width-len_of_number(i)-3, ' ');
}
}
mvaddnstr(0, this->offset, s.str+this->scroll_h,
MIN(s.len-this->scroll_h, this->width*num_of_cpus()));
attroff(COLOR_PAIR(2));
/* draw body */
for (i = 1; i < LINES-1; i++, idx++) {
move(i, 0);
/* highlight the current row */
if (i == cur_row) {
attron(COLOR_PAIR(1));
idx_hl = idx;
}
if (idx >= this->state_nr) {
/* do not show this line */
nr_addch(this->offset+this->width*num_of_cpus(), ' ');
} else {
if (!strcmp(this->name, "Event")) {
uint64_t delta = 0;
if (idx)
delta = (state[idx].tsc - state[idx-1].tsc)/tsc2us;
printw("%20"PRIu64"(", state[idx].tsc);
display_number(delta, 8);
printw("us) ");
} else if (!strcmp(this->name, "Time")) {
printw("%20"PRIu64" ", state[idx].tsc);
}
s.len = 0;
for (j = 0; j < max_cpu_num; j++) {
/* draw cpu state */
if (this->cpu_bitmap[j])
draw_cpu_state(&s, &state[idx].cpu[j], this->width);
}
/* draw the line accordingly */
mvaddnstr(i, this->offset, s.str+this->scroll_h,
MIN(s.len-this->scroll_h, this->width*num_of_cpus()));
}
/* pair of the highlight logics */
if (i == cur_row)
attroff(COLOR_PAIR(1));
}
/* draw tail line */
attron(COLOR_PAIR(2));
s.len = 0;
l = 0;
l += string_print(&s, "%s Mode [%sLINKED]", this->name, is_link ? "" : "NOT ");
if (!strcmp(this->name, "Time")) {
#if 0
l += string_print(&s, " [%"PRIu64":%"PRIu64"]",
this->start_time, this->time_scale);
#endif
l += string_print(&s, " [%"PRIu64"]",
this->time_scale);
}
if (is_menu_gov_enabled == 1) {
for (i = 0; i < max_cpu_num; i++) {
if (this->cpu_bitmap[i] &&
state[idx_hl].cpu[i].flag == FLAG_EDGE &&
state[idx_hl].cpu[i].cx > 0)
l += string_print(&s, " (CPU%d,%lu,%lu)",
i,
state[idx_hl].cpu[i].expected,
state[idx_hl].cpu[i].predicted);
}
}
/* add cx exit residency info */
for (i = 0; i < max_cpu_num; i++) {
if (this->cpu_bitmap[i] &&
state[idx_hl].cpu[i].flag == FLAG_EDGE &&
state[idx_hl].cpu[i].cx == 0) {
uint64_t tsc = state[idx_hl].tsc;
int k;
k = 0;
while (k < evt_len[i] &&
evt[i][k].tsc < tsc)
k++;
k--;
if (k >= 0 && k+1 < evt_len[i] && evt[i][k].cx > 0) {
l += string_print(&s, " (CPU%d, %"PRIu64"us)",
i,
(evt[i][k+1].tsc - evt[i][k].tsc)/tsc2us);
}
}
}
string_nr_addch(&s, this->offset+this->width*num_of_cpus()-l, ' ');
mvaddstr(LINES-1, 0, s.str);
attroff(COLOR_PAIR(2));
refresh();
}
void event_mode_exit(void)
{
free(this->state);
this->initialized = 0;
}
void mode_exit(void)
{
int nr = sizeof(modes)/sizeof(modes[0]);
int i;
for (i = 0; i < nr; i++) {
this = &modes[i];
if (this->initialized)
this->exit();
}
}
int mode_init(void)
{
int nr = sizeof(modes)/sizeof(modes[0]);
int i, r = 0;
for (i = 0; i < nr; i++) {
this = &modes[i];
this->initialized = 0;
r += this->init();
}
this = &modes[0];
/* hook into exit */
atexit(mode_exit);
return r;
}
int time_mode_rebuild(uint64_t start_time, uint64_t time_scale)
{
int i, j;
struct cpu cur_state[MAX_CPU_NR];
uint64_t tsc = start_time;
struct state *state;
uint64_t number, temp = 0;
int state_cur = 0;
for (i = 0; i < max_cpu_num; i++)
cur_state[i].flag = FLAG_UNKNOWN;
/* allocate spaces, it may be huge... */
if (time_scale)
temp = (data[data_cur-1].tsc - start_time)/time_scale;
number = 10000UL;
if (temp < number)
number = temp;
number += 2;
state = malloc(sizeof(struct state) * number);
if (!state)
return 1;
free(this->state);
this->state = state;
this->width = 9;
this->row = 0;
/* determine the current Cx state */
/* check [data[0].tsc, tsc) */
i = 0;
while (i < data_cur && data[i].tsc < tsc) {
int cpu = data[i].cpu;
cur_state[cpu].cx = data[i].cx;
cur_state[cpu].flag = FLAG_LEVEL;
i++;
}
while (i < data_cur && state_cur < number) {
int num[MAX_CPU_NR];
int last_idx[MAX_CPU_NR];
#if 0
printf("XXXXX %d tsc: %"PRIu64" data[i].tsc: %"PRIu64"\n",
i, tsc, data[i].tsc);
#endif
/* ensure they are zero */
memset(num, 0, sizeof(int) * MAX_CPU_NR);
memset(last_idx, 0, sizeof(int) * MAX_CPU_NR);
/* check [tsc, tsc+time_scale) */
while (i < data_cur && data[i].tsc < tsc+time_scale) {
int cpu = data[i].cpu;
num[cpu]++;
last_idx[cpu] = i;
i++;
}
/* TODO */
if (i >= data_cur)
break;
for (j = 0; j < max_cpu_num; j++) {
if (num[j] == 1) {
/* only one event, it's an edge*/
cur_state[j].cx = data[last_idx[j]].cx;
cur_state[j].flag = FLAG_EDGE;
} else if (num[j] > 1) {
/* more than one event, it's fuzzy */
cur_state[j].cx = data[last_idx[j]].cx;
cur_state[j].flag = FLAG_FUZZY;
} else if (cur_state[j].flag == FLAG_FUZZY) {
/* no event, fuzzy state can't be passed down
* notice that cx is set in the fuzzy state,
* it's not changed here afterwards.
*/
cur_state[j].flag = FLAG_LEVEL;
}
}
/* copy tsc */
state[state_cur].tsc = tsc;
for (j = 0; j < max_cpu_num; j++) {
/* copy cx and flag */
state[state_cur].cpu[j].cx = cur_state[j].cx;
state[state_cur].cpu[j].flag = cur_state[j].flag;
/* update flag in cur_state */
if (cur_state[j].flag == FLAG_EDGE) {
cur_state[j].flag = FLAG_LEVEL;
if (cur_state[j].cx == 0) {
/* EXIT */
/* copy irqs conditionally */
memcpy(state[state_cur].cpu[j].irqs,
data[last_idx[j]].irqs,
sizeof(unsigned char) * 4);
} else {
/* ENTRY */
state[state_cur].cpu[j].expected =
data[last_idx[j]].expected;
state[state_cur].cpu[j].predicted =
data[last_idx[j]].predicted;
}
}
}
state_cur++;
tsc += time_scale;
}
this->state_nr = state_cur;
this->row = 0;
return 0;
}
int time_mode_init(void)
{
int i;
this->offset = 21;
this->scroll_h = 0;
this->time_scale = (data[data_cur-1].tsc -data[0].tsc)/10000UL;
this->start_time = data[0].tsc;
for (i = 0; i < max_cpu_num; i++)
this->cpu_bitmap[i] = 1;
return time_mode_rebuild(this->start_time,
this->time_scale);
}
void choose_cpus(void)
{
int i;
int temp_row = 1;
int ch;
clear();
mvprintw(0, 0, "How many CPUs to track? Press space to toggle. Press 'q' or 'Q' to quit.");
while (1) {
for (i = 0; i < max_cpu_num; i++) {
if (temp_row == i+1)
attron(COLOR_PAIR(2));
mvprintw(i+1, 0, "[%s] CPU%d", this->cpu_bitmap[i] ? "x" : " ", i);
if (temp_row == i+1)
attroff(COLOR_PAIR(2));
}
ch = getch();
switch (ch) {
case KEY_UP:
if (--temp_row < 1)
temp_row = 1;
break;
case KEY_DOWN:
if (++temp_row > max_cpu_num)
temp_row = max_cpu_num;
break;
case ' ':
this->cpu_bitmap[temp_row-1] = !this->cpu_bitmap[temp_row-1];
break;
case 'q':
case 'Q':
if (num_of_cpus() >= 1) {
if (!strcmp(this->name, "Event"))
this->init();
return;
}
case KEY_F(4):
exit(EXIT_SUCCESS);
}
}
}
int num_of_cpus(void)
{
int i, nr = 0;
for (i = 0; i < max_cpu_num; i++)
if (this->cpu_bitmap[i])
nr++;
return nr;
}
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