The patch titled
freezer: measure freezing time
has been added to the -mm tree. Its filename is
freezer-measure-freezing-time.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: freezer: measure freezing time
From: Rafael J. Wysocki <rjw@xxxxxxx>
Measure the time of the freezing of tasks, even if it doesn't fail.
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/power/process.c | 18 +++++++++++++++---
1 files changed, 15 insertions(+), 3 deletions(-)
diff -puN kernel/power/process.c~freezer-measure-freezing-time kernel/power/process.c
--- a/kernel/power/process.c~freezer-measure-freezing-time
+++ a/kernel/power/process.c
@@ -190,6 +190,11 @@ static int try_to_freeze_tasks(int freez
struct task_struct *g, *p;
unsigned long end_time;
unsigned int todo;
+ struct timeval start, end;
+ s64 elapsed_csecs64;
+ unsigned int elapsed_csecs;
+
+ do_gettimeofday(&start);
end_time = jiffies + TIMEOUT;
refrigerator_called = 0;
@@ -226,6 +231,11 @@ static int try_to_freeze_tasks(int freez
break;
} while (todo);
+ do_gettimeofday(&end);
+ elapsed_csecs64 = timeval_to_ns(&end) - timeval_to_ns(&start);
+ do_div(elapsed_csecs64, NSEC_PER_SEC / 100);
+ elapsed_csecs = elapsed_csecs64;
+
if (todo) {
/* This does not unfreeze processes that are already frozen
* (we have slightly ugly calling convention in that respect,
@@ -233,10 +243,9 @@ static int try_to_freeze_tasks(int freez
* but it cleans up leftover PF_FREEZE requests.
*/
printk("\n");
- printk(KERN_ERR "Freezing of %s timed out after %d seconds "
+ printk(KERN_ERR "Freezing of tasks failed after %d.%02d seconds "
"(%d tasks refusing to freeze):\n",
- freeze_user_space ? "user space " : "tasks ",
- TIMEOUT / HZ, todo);
+ elapsed_csecs / 100, elapsed_csecs % 100, todo);
show_state();
read_lock(&tasklist_lock);
do_each_thread(g, p) {
@@ -247,6 +256,9 @@ static int try_to_freeze_tasks(int freez
task_unlock(p);
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
+ } else {
+ printk("(elapsed %d.%02d seconds) ", elapsed_csecs / 100,
+ elapsed_csecs % 100);
}
return todo ? -EBUSY : 0;
_
Patches currently in -mm which might be from rjw@xxxxxxx are
origin.patch
pm-move-definition-of-struct-pm_ops-to-suspendh.patch
pm-rename-struct-pm_ops-and-related-things.patch
pm-rework-struct-platform_suspend_ops.patch
pm-make-suspend_ops-static.patch
pm-rework-struct-hibernation_ops.patch
pm-rename-hibernation_ops-to-platform_hibernation_ops.patch
freezer-document-relationship-with-memory-shrinking.patch
freezer-do-not-sync-filesystems-from-freeze_processes.patch
freezer-prevent-new-tasks-from-inheriting-tif_freeze-set.patch
freezer-introduce-freezer-firendly-waiting-macros.patch
freezer-do-not-send-signals-to-kernel-threads.patch
unexport-pm_power_off_prepare.patch
pm_trace-displays-the-wrong-time-from-the-rtc.patch
freezer-be-more-verbose.patch
freezer-use-wait-queue-instead-of-busy-looping.patch
freezer-measure-freezing-time.patch
shrink_slab-handle-bad-shrinkers.patch
-
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