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utils: ps: display WCHAN with option -w 

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
This commit is contained in:
Philippe Gerum 2021-07-05 18:05:39 +02:00
parent c5dd9ab292
commit 70a49e4a18
1 changed files with 44 additions and 1 deletions
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45
utils/evl-ps.c
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@ -28,6 +28,7 @@ static cpu_set_t cpu_restrict;
#define DISPLAY_STATE 1
#define DISPLAY_TIMES 2
#define DISPLAY_SCHED 4
#define DISPLAY_WAIT 8
#define DISPLAY_NUMERIC 32
#define DISPLAY_MODIFIERS DISPLAY_NUMERIC
@ -53,7 +54,7 @@ static int sort_key;
for (__cpu = 0; __cpu < CPU_SETSIZE; __cpu++) \
if (CPU_ISSET(__cpu, &cpu_restrict))
#define short_optlist "@hnlstpc:S:"
#define short_optlist "@hnlstwpc:S:"
static const struct option options[] = {
{
@ -71,6 +72,11 @@ static const struct option options[] = {
.has_arg = no_argument,
.val = 't',
},
{
.name = "wait",
.has_arg = no_argument,
.val = 'w',
},
{
.name = "policy",
.has_arg = no_argument,
@ -114,6 +120,7 @@ static struct thread_info {
unsigned long nr_rwakeups;
unsigned long long cpu_time;
unsigned long long timeout;
char *wchan;
int percent_cpu;
unsigned int state;
pid_t pid;
@ -166,6 +173,13 @@ static bool collect_timeout(struct thread_info *ti, char *buf)
return ret == 1;
}
static bool collect_wchan(struct thread_info *ti, char *buf)
{
int ret = sscanf(buf, "%ms", &ti->wchan);
return ret == 1;
}
static struct collect_handler {
const char *name;
bool (*handle)(struct thread_info *ti, char *buf);
@ -190,6 +204,10 @@ static struct collect_handler {
.name = "timeout",
.handle = collect_timeout,
},
{
.name = "wchan",
.handle = collect_wchan,
},
};
static int scan_thread(const char *fpath, const struct stat *sb,
@ -591,6 +609,17 @@ static struct display_handler rwakeups_handler = {
.display_data = display_rwakeups,
};
static void display_wchan(struct thread_info *ti)
{
printf("%-15s", ti->wchan);
}
static struct display_handler wchan_handler = {
.header = "WCHAN",
.header_fmt = "%-15s",
.display_data = display_wchan,
};
static void print_thread_info(void)
{
int nr_restrict = CPU_COUNT(&cpu_restrict);
@ -630,6 +659,16 @@ static void print_thread_info(void)
h->next = &time_handler;
h = &time_handler;
}
if (display_format & DISPLAY_WAIT) {
h->next = &timeout_handler;
h = &timeout_handler;
h->next = &rwakeups_handler;
h = &rwakeups_handler;
h->next = &state_handler;
h = &state_handler;
h->next = &wchan_handler;
h = &wchan_handler;
}
h->next = &name_handler;
for (h = chain; h; h = h->next)
@ -654,6 +693,7 @@ static void usage(char *arg0)
fprintf(stderr, "-s --state display thread state\n");
fprintf(stderr, "-t --times display CPU utilization\n");
fprintf(stderr, "-p --policy display scheduling policy\n");
fprintf(stderr, "-w --wait display wait channel\n");
fprintf(stderr, "-l --long long format, same as -stp\n");
fprintf(stderr, "-n --numeric numeric output for STAT\n");
fprintf(stderr, "-S --sort=<c|i|t|x|w> sort key: c=%%CPU, i=ISW, t=CPUTIME, x=CTXSW, w=RWA\n");
@ -750,6 +790,9 @@ int main(int argc, char *const argv[])
case 'n':
display_format |= DISPLAY_NUMERIC;
break;
case 'w':
display_format = DISPLAY_WAIT;
break;
case 'S':
for (p = optarg; *p; p++) {
switch (*p) {