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ANDROID: mm: page_pinner: change timestamp format

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This patch changes timestamp format to align with trace event time format.
It was much easier to parse page_pinner event order by the time with
trace event.

Bug: 192475091
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: Ib0e81a47df588a2f6ebf842a5f3c5b298da4fe40
This commit is contained in:
Minchan Kim 2021-07-07 13:46:58 -07:00
parent 71da06728c
commit 0445b67bee
1 changed files with 25 additions and 11 deletions
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36
mm/page_pinner.c
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@ -25,7 +25,10 @@ struct page_pinner {
struct captured_pinner {
depot_stack_handle_t handle;
s64 ts_usec;
union {
s64 ts_usec;
s64 elapsed;
};
int page_mt;
unsigned long page_flags;
unsigned long pfn;
@ -137,7 +140,7 @@ static void check_longterm_pin(struct page_pinner *page_pinner,
return;
record.handle = page_pinner->handle;
record.ts_usec = delta;
record.elapsed = delta;
capture_page_state(page, &record);
spin_lock_irqsave(&lt_pinner.lock, flags);
@ -206,7 +209,7 @@ noinline void __set_page_pinner(struct page *page, unsigned int order)
}
static ssize_t
print_page_pinner(char __user *buf, size_t count, struct captured_pinner *record)
print_page_pinner(bool longterm, char __user *buf, size_t count, struct captured_pinner *record)
{
int ret;
unsigned long *entries;
@ -218,9 +221,17 @@ print_page_pinner(char __user *buf, size_t count, struct captured_pinner *record
if (!kbuf)
return -ENOMEM;
ret = snprintf(kbuf, count,
"Page pinned ts %lld us\n",
record->ts_usec);
if (longterm) {
ret = snprintf(kbuf, count, "Page pinned for %lld us\n",
record->elapsed);
} else {
s64 ts_usec = record->ts_usec;
unsigned long rem_usec = do_div(ts_usec, 1000000);
ret = snprintf(kbuf, count,
"Page pinned ts [%5lu.%06lu]\n",
(unsigned long)ts_usec, rem_usec);
}
if (ret >= count)
goto err;
@ -267,6 +278,8 @@ void __dump_page_pinner(struct page *page)
int pageblock_mt;
unsigned long pfn;
int count;
unsigned long rem_usec;
s64 ts_usec;
if (unlikely(!page_ext)) {
pr_alert("There is not page extension available.\n");
@ -282,9 +295,10 @@ void __dump_page_pinner(struct page *page)
}
pfn = page_to_pfn(page);
pr_alert("page last pinned ts %lld count %d\n",
page_pinner->ts_usec,
count);
ts_usec = page_pinner->ts_usec;
rem_usec = do_div(ts_usec, 1000000);
pr_alert("page last pinned %5lu.%06lu] count %d\n",
(unsigned long)ts_usec, rem_usec, count);
pageblock_mt = get_pageblock_migratetype(page);
pr_alert("PFN %lu Block %lu type %s Flags %#lx(%pGp)\n",
@ -374,7 +388,7 @@ read_longterm_page_pinner(struct file *file, char __user *buf, size_t count,
if (!record.handle)
return 0;
return print_page_pinner(buf, count, &record);
return print_page_pinner(true, buf, count, &record);
}
static const struct file_operations proc_longterm_pinner_operations = {
@ -410,7 +424,7 @@ static ssize_t read_alloc_contig_failed(struct file *file, char __user *buf,
if (!record.handle)
return 0;
return print_page_pinner(buf, count, &record);
return print_page_pinner(false, buf, count, &record);
}
static const struct file_operations proc_alloc_contig_failed_operations = {