Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-10 15:14:43 +00:00
Code Issues Projects Releases Packages Wiki Activity

bootstage: Add time accumulation feature

Browse source 
Sometimes we want to add up the amount of time spent in a particular
activity when it is happening in a number of discrete chunks.

Add bootstage_start() to mark the start of an acitivity and
bootstage_accum() to accumulate the time since the last start. Calling
these function in pairs results in the accumulated time being collected.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2012-09-28 08:56:36 +00:00 committed by Anatolij Gustschin
parent 094e06a523
commit 0e99677358
2 changed files with 60 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
common/bootstage.c
View file

@ -90,6 +90,25 @@ ulong bootstage_mark_name(enum bootstage_id id, const char *name)
return bootstage_add_record(id, name, flags, timer_get_boot_us());
}
uint32_t bootstage_start(enum bootstage_id id, const char *name)
{
struct bootstage_record *rec = &record[id];
rec->start_us = timer_get_boot_us();
rec->name = name;
return rec->start_us;
}
uint32_t bootstage_accum(enum bootstage_id id)
{
struct bootstage_record *rec = &record[id];
uint32_t duration;
duration = (uint32_t)timer_get_boot_us() - rec->start_us;
rec->time_us += duration;
return duration;
}
static void print_time(unsigned long us_time)
{
char str[15], *s;
@ -108,8 +127,13 @@ static void print_time(unsigned long us_time)
static uint32_t print_time_record(enum bootstage_id id,
struct bootstage_record *rec, uint32_t prev)
{
print_time(rec->time_us);
print_time(rec->time_us - prev);
if (prev == -1U) {
printf("%11s", "");
print_time(rec->time_us);
} else {
print_time(rec->time_us);
print_time(rec->time_us - prev);
}
if (rec->name)
printf(" %s\n", rec->name);
else if (id >= BOOTSTAGE_ID_USER)
@ -144,13 +168,19 @@ void bootstage_report(void)
qsort(record, ARRAY_SIZE(record), sizeof(*rec), h_compare_record);
for (id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
if (rec->time_us != 0)
if (rec->time_us != 0 && !rec->start_us)
prev = print_time_record(rec->id, rec, prev);
}
if (next_id > BOOTSTAGE_ID_COUNT)
printf("(Overflowed internal boot id table by %d entries\n"
"- please increase CONFIG_BOOTSTAGE_USER_COUNT\n",
next_id - BOOTSTAGE_ID_COUNT);
puts("\nAccumulated time:\n");
for (id = 0, rec = record; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
if (rec->start_us)
prev = print_time_record(id, rec, -1);
}
}
ulong __timer_get_boot_us(void)

27
include/bootstage.h
View file

@ -247,6 +247,33 @@ ulong bootstage_error(enum bootstage_id id);
ulong bootstage_mark_name(enum bootstage_id id, const char *name);
/**
* Mark the start of a bootstage activity. The end will be marked later with
* bootstage_accum() and at that point we accumulate the time taken. Calling
* this function turns the given id into a accumulator rather than and
* absolute mark in time. Accumulators record the total amount of time spent
* in an activty during boot.
*
* @param id Bootstage id to record this timestamp against
* @param name Textual name to display for this id in the report (maybe NULL)
* @return start timestamp in microseconds
*/
uint32_t bootstage_start(enum bootstage_id id, const char *name);
/**
* Mark the end of a bootstage activity
*
* After previously marking the start of an activity with bootstage_start(),
* call this function to mark the end. You can call these functions in pairs
* as many times as you like.
*
* @param id Bootstage id to record this timestamp against
* @return time spent in this iteration of the activity (i.e. the time now
* less the start time recorded in the last bootstage_start() call
* with this id.
*/
uint32_t bootstage_accum(enum bootstage_id id);
/* Print a report about boot time */
void bootstage_report(void);