[PATCH] swsusp: add read-speed instrumentation

Add some instrumentation to the swsusp readin code to show what bandwidth
we're achieving.

Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 2dc883d361d5..9ab989572164 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -522,12 +522,15 @@ static int load_image(struct swap_map_handle *handle,
         unsigned int m;
         int ret;
         int error = 0;
+        struct timeval start;
+        struct timeval stop;
 
         printk("Loading image data pages (%u pages) ...     ", nr_pages);
         m = nr_pages / 100;
         if (!m)
                 m = 1;
         nr_pages = 0;
+        do_gettimeofday(&start);
         do {
                 ret = snapshot_write_next(snapshot, PAGE_SIZE);
                 if (ret > 0) {
@@ -539,11 +542,13 @@ static int load_image(struct swap_map_handle *handle,
                         nr_pages++;
                 }
         } while (ret > 0);
+        do_gettimeofday(&stop);
         if (!error) {
                 printk("\b\b\b\bdone\n");
                 if (!snapshot_image_loaded(snapshot))
                         error = -ENODATA;
         }
+        show_speed(&start, &stop, nr_pages, "Read");
         return error;
 }