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profile: better time breakdown and exclusion of idle cycles

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This commit is contained in:
Balazs Gerofi
2017-07-20 17:36:34 +09:00
parent 64c2e437c6
commit 992a292c08
5 changed files with 160 additions and 30 deletions
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122
kernel/profile.c
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@ -74,6 +74,7 @@ mcs_lock_node_t job_profile_lock = {0, NULL};
struct profile_event *job_profile_events = NULL;
int job_nr_processes = -1;
int job_nr_processes_left = -1;
unsigned long job_elapsed_ts;
@ -111,16 +112,26 @@ void profile_print_thread_stats(struct thread *thread)
int i;
unsigned long flags;
if (!thread->profile_events) return;
if (!thread->profile_events)
return;
/* Not yet accumulated period? */
if (thread->profile_start_ts) {
thread->profile_elapsed_ts += (rdtsc() - thread->profile_start_ts);
}
flags = kprintf_lock();
__kprintf("TID: %4d elapsed cycles (excluding idle): %luk\n",
thread->tid,
thread->profile_elapsed_ts / 1000);
for (i = 0; i < PROFILE_SYSCALL_MAX; ++i) {
if (!thread->profile_events[i].cnt &&
!thread->profile_events[i + PROFILE_SYSCALL_MAX].cnt)
!thread->profile_events[i + PROFILE_SYSCALL_MAX].cnt)
continue;
__kprintf("TID: %4d (%3d,%20s): %6u %6luk offl: %6u %6luk\n",
__kprintf("TID: %4d (%3d,%20s): %6u %6luk offl: %6u %6luk (%2d.%2d%%)\n",
thread->tid,
i,
syscall_name[i],
@ -133,7 +144,13 @@ void profile_print_thread_stats(struct thread *thread)
(thread->profile_events[i + PROFILE_SYSCALL_MAX].tsc /
(thread->profile_events[i + PROFILE_SYSCALL_MAX].cnt ?
thread->profile_events[i + PROFILE_SYSCALL_MAX].cnt : 1))
/ 1000
/ 1000,
(thread->profile_events[i].tsc ?
thread->profile_events[i].tsc * 100
/ thread->profile_elapsed_ts : 0),
(thread->profile_events[i].tsc ?
(thread->profile_events[i].tsc * 10000
/ thread->profile_elapsed_ts) % 100 : 0)
);
}
@ -149,7 +166,14 @@ void profile_print_thread_stats(struct thread *thread)
(thread->profile_events[i].tsc /
(thread->profile_events[i].cnt ?
thread->profile_events[i].cnt : 1))
/ 1000);
/ 1000,
(thread->profile_events[i].tsc ?
thread->profile_events[i].tsc * 100
/ thread->profile_elapsed_ts : 0),
(thread->profile_events[i].tsc ?
(thread->profile_events[i].tsc * 10000
/ thread->profile_elapsed_ts) % 100 : 0)
);
}
@ -161,16 +185,20 @@ void profile_print_proc_stats(struct process *proc)
int i;
unsigned long flags;
if (!proc->profile_events) return;
if (!proc->profile_events || !proc->profile_elapsed_ts)
return;
flags = kprintf_lock();
__kprintf("PID: %4d elapsed cycles for all threads (excluding idle): %luk\n",
proc->pid,
proc->profile_elapsed_ts / 1000);
for (i = 0; i < PROFILE_SYSCALL_MAX; ++i) {
if (!proc->profile_events[i].cnt &&
!proc->profile_events[i + PROFILE_SYSCALL_MAX].cnt)
!proc->profile_events[i + PROFILE_SYSCALL_MAX].cnt)
continue;
__kprintf("PID: %4d (%3d,%20s): %6u %6luk offl: %6u %6luk\n",
__kprintf("PID: %4d (%3d,%20s): %6u %6luk offl: %6u %6luk (%2d.%2d%%)\n",
proc->pid,
i,
syscall_name[i],
@ -183,7 +211,13 @@ void profile_print_proc_stats(struct process *proc)
(proc->profile_events[i + PROFILE_SYSCALL_MAX].tsc /
(proc->profile_events[i + PROFILE_SYSCALL_MAX].cnt ?
proc->profile_events[i + PROFILE_SYSCALL_MAX].cnt : 1))
/ 1000
/ 1000,
(proc->profile_events[i].tsc ?
proc->profile_events[i].tsc * 100
/ proc->profile_elapsed_ts : 0),
(proc->profile_events[i].tsc ?
(proc->profile_events[i].tsc * 10000
/ proc->profile_elapsed_ts) % 100 : 0)
);
}
@ -199,7 +233,16 @@ void profile_print_proc_stats(struct process *proc)
(proc->profile_events[i].tsc /
(proc->profile_events[i].cnt ?
proc->profile_events[i].cnt : 1))
/ 1000);
/ 1000,
(proc->profile_events[i].tsc &&
proc->profile_elapsed_ts ?
proc->profile_events[i].tsc * 100
/ proc->profile_elapsed_ts : 0),
(proc->profile_events[i].tsc &&
proc->profile_elapsed_ts ?
(proc->profile_events[i].tsc * 10000
/ proc->profile_elapsed_ts) % 100 : 0)
);
}
kprintf_unlock(flags);
@ -217,6 +260,7 @@ int profile_accumulate_and_print_job_events(struct process *proc)
if (job_nr_processes == -1) {
job_nr_processes = proc->nr_processes;
job_nr_processes_left = proc->nr_processes;
job_elapsed_ts = 0;
}
--job_nr_processes_left;
@ -248,16 +292,21 @@ int profile_accumulate_and_print_job_events(struct process *proc)
proc->profile_events[i].cnt = 0;
}
job_elapsed_ts += proc->profile_elapsed_ts;
/* Last process? */
if (job_nr_processes_left == 0) {
flags = kprintf_lock();
__kprintf("JOB: (%2d) elapsed cycles for all threads (excluding idle): %luk\n",
job_nr_processes,
job_elapsed_ts / 1000);
for (i = 0; i < PROFILE_SYSCALL_MAX; ++i) {
if (!job_profile_events[i].cnt &&
!job_profile_events[i + PROFILE_SYSCALL_MAX].cnt)
continue;
__kprintf("JOB: (%2d) (%3d,%20s): %6u %6luk offl: %6u %6luk\n",
__kprintf("JOB: (%2d) (%3d,%20s): %6u %6luk offl: %6u %6luk (%2d.%2d%%)\n",
job_nr_processes,
i,
syscall_name[i],
@ -270,7 +319,13 @@ int profile_accumulate_and_print_job_events(struct process *proc)
(job_profile_events[i + PROFILE_SYSCALL_MAX].tsc /
(job_profile_events[i + PROFILE_SYSCALL_MAX].cnt ?
job_profile_events[i + PROFILE_SYSCALL_MAX].cnt : 1))
/ 1000
/ 1000,
(job_profile_events[i].tsc ?
job_profile_events[i].tsc * 100
/ job_elapsed_ts : 0),
(job_profile_events[i].tsc ?
(job_profile_events[i].tsc * 10000
/ job_elapsed_ts) % 100 : 0)
);
job_profile_events[i].tsc = 0;
@ -302,6 +357,7 @@ int profile_accumulate_and_print_job_events(struct process *proc)
/* Reset job process indicators */
job_nr_processes = -1;
job_nr_processes_left = -1;
job_elapsed_ts = 0;
}
mcs_lock_unlock(&job_profile_lock, &mcs_node);
@ -326,6 +382,12 @@ void profile_accumulate_events(struct thread *thread,
thread->profile_events[i].cnt = 0;
}
proc->profile_elapsed_ts += thread->profile_elapsed_ts;
if (thread->profile_start_ts) {
proc->profile_elapsed_ts +=
(rdtsc() - thread->profile_start_ts);
}
mcs_lock_unlock(&proc->profile_lock, &mcs_node);
}
@ -381,6 +443,7 @@ void profile_dealloc_proc_events(struct process *proc)
void static profile_clear_process(struct process *proc)
{
proc->profile_elapsed_ts = 0;
if (!proc->profile_events) return;
memset(proc->profile_events, 0,
@ -389,6 +452,8 @@ void static profile_clear_process(struct process *proc)
void static profile_clear_thread(struct thread *thread)
{
thread->profile_start_ts = 0;
thread->profile_elapsed_ts = 0;
if (!thread->profile_events) return;
memset(thread->profile_events, 0,
@ -399,6 +464,7 @@ int do_profile(int flag)
{
struct thread *thread = cpu_local_var(current);
struct process *proc = thread->proc;
unsigned long now_ts = rdtsc();
/* Job level? */
if (flag & PROF_JOB) {
@ -444,7 +510,14 @@ int do_profile(int flag)
_thread->profile = 1;
}
else if (flag & PROF_OFF) {
_thread->profile = 0;
if (_thread->profile) {
_thread->profile = 0;
if (_thread->profile_start_ts) {
_thread->profile_elapsed_ts +=
(now_ts - _thread->profile_start_ts);
}
_thread->profile_start_ts = 0;
}
}
}
@ -460,7 +533,9 @@ int do_profile(int flag)
/* Make sure future threads profile as well */
if (flag & PROF_ON) {
proc->profile = 1;
if (!proc->profile) {
proc->profile = 1;
}
}
else if (flag & PROF_OFF) {
proc->profile = 0;
@ -476,13 +551,28 @@ int do_profile(int flag)
if (flag & PROF_CLEAR) {
profile_clear_thread(thread);
/* If profiling, reset start and elapsed */
if (thread->profile) {
thread->profile_start_ts = 0;
thread->profile_elapsed_ts = 0;
}
}
if (flag & PROF_ON) {
thread->profile = 1;
if (!thread->profile) {
thread->profile = 1;
thread->profile_start_ts = 0;
}
}
else if (flag & PROF_OFF) {
thread->profile = 0;
if (thread->profile) {
thread->profile = 0;
if (thread->profile_start_ts) {
thread->profile_elapsed_ts +=
(now_ts - thread->profile_start_ts);
}
thread->profile_start_ts = 0;
}
}
}