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[PATCH] swsusp: Measure memory shrinking time

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Make swsusp measure and print the time needed to shrink memory during the
suspend.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@suspend2.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rafael J. Wysocki
2006-12-06 20:34:32 -08:00
committed by Linus Torvalds
parent 112cecb2cc
commit 0d3a9abe8a
3 changed files with 39 additions and 22 deletions
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24
kernel/power/swap.c
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@@ -133,26 +133,6 @@ static int wait_on_bio_chain(struct bio **bio_chain)
return ret;
}
static void show_speed(struct timeval *start, struct timeval *stop,
unsigned nr_pages, char *msg)
{
s64 elapsed_centisecs64;
int centisecs;
int k;
int kps;
elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
centisecs = elapsed_centisecs64;
if (centisecs == 0)
centisecs = 1; /* avoid div-by-zero */
k = nr_pages * (PAGE_SIZE / 1024);
kps = (k * 100) / centisecs;
printk("%s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n", msg, k,
centisecs / 100, centisecs % 100,
kps / 1000, (kps % 1000) / 10);
}
/*
* Saving part
*/
@@ -375,7 +355,7 @@ static int save_image(struct swap_map_handle *handle,
error = err2;
if (!error)
printk("\b\b\b\bdone\n");
show_speed(&start, &stop, nr_to_write, "Wrote");
swsusp_show_speed(&start, &stop, nr_to_write, "Wrote");
return error;
}
@@ -562,7 +542,7 @@ static int load_image(struct swap_map_handle *handle,
if (!snapshot_image_loaded(snapshot))
error = -ENODATA;
}
show_speed(&start, &stop, nr_to_read, "Read");
swsusp_show_speed(&start, &stop, nr_to_read, "Read");
return error;
}