diff options
Diffstat (limited to 'kernel/power/swsusp.c')
| -rw-r--r-- | kernel/power/swsusp.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c index 68de5c1dbd78..aa31432bbd97 100644 --- a/kernel/power/swsusp.c +++ b/kernel/power/swsusp.c @@ -49,6 +49,7 @@ #include <linux/bootmem.h> #include <linux/syscalls.h> #include <linux/highmem.h> +#include <linux/time.h> #include "power.h" @@ -164,6 +165,34 @@ void free_all_swap_pages(int swap, struct bitmap_page *bitmap) } /** + * swsusp_show_speed - print the time elapsed between two events represented by + * @start and @stop + * + * @nr_pages - number of pages processed between @start and @stop + * @msg - introductory message to print + */ + +void swsusp_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); +} + +/** * swsusp_shrink_memory - Try to free as much memory as needed * * ... but do not OOM-kill anyone @@ -187,8 +216,10 @@ int swsusp_shrink_memory(void) unsigned long pages = 0; unsigned int i = 0; char *p = "-\\|/"; + struct timeval start, stop; printk("Shrinking memory... "); + do_gettimeofday(&start); do { long size, highmem_size; @@ -222,7 +253,9 @@ int swsusp_shrink_memory(void) } printk("\b%c", p[i++%4]); } while (tmp > 0); + do_gettimeofday(&stop); printk("\bdone (%lu pages freed)\n", pages); + swsusp_show_speed(&start, &stop, pages, "Freed"); return 0; } |