diff options
Diffstat (limited to 'Documentation/laptops/laptop-mode.txt')
-rw-r--r-- | Documentation/laptops/laptop-mode.txt | 170 |
1 files changed, 1 insertions, 169 deletions
diff --git a/Documentation/laptops/laptop-mode.txt b/Documentation/laptops/laptop-mode.txt index eeedee11c8c2..2c3c35093023 100644 --- a/Documentation/laptops/laptop-mode.txt +++ b/Documentation/laptops/laptop-mode.txt | |||
@@ -779,172 +779,4 @@ Monitoring tool | |||
779 | --------------- | 779 | --------------- |
780 | 780 | ||
781 | Bartek Kania submitted this, it can be used to measure how much time your disk | 781 | Bartek Kania submitted this, it can be used to measure how much time your disk |
782 | spends spun up/down. | 782 | spends spun up/down. See Documentation/laptops/dslm.c |
783 | |||
784 | ---------------------------dslm.c BEGIN----------------------------------------- | ||
785 | /* | ||
786 | * Simple Disk Sleep Monitor | ||
787 | * by Bartek Kania | ||
788 | * Licenced under the GPL | ||
789 | */ | ||
790 | #include <unistd.h> | ||
791 | #include <stdlib.h> | ||
792 | #include <stdio.h> | ||
793 | #include <fcntl.h> | ||
794 | #include <errno.h> | ||
795 | #include <time.h> | ||
796 | #include <string.h> | ||
797 | #include <signal.h> | ||
798 | #include <sys/ioctl.h> | ||
799 | #include <linux/hdreg.h> | ||
800 | |||
801 | #ifdef DEBUG | ||
802 | #define D(x) x | ||
803 | #else | ||
804 | #define D(x) | ||
805 | #endif | ||
806 | |||
807 | int endit = 0; | ||
808 | |||
809 | /* Check if the disk is in powersave-mode | ||
810 | * Most of the code is stolen from hdparm. | ||
811 | * 1 = active, 0 = standby/sleep, -1 = unknown */ | ||
812 | int check_powermode(int fd) | ||
813 | { | ||
814 | unsigned char args[4] = {WIN_CHECKPOWERMODE1,0,0,0}; | ||
815 | int state; | ||
816 | |||
817 | if (ioctl(fd, HDIO_DRIVE_CMD, &args) | ||
818 | && (args[0] = WIN_CHECKPOWERMODE2) /* try again with 0x98 */ | ||
819 | && ioctl(fd, HDIO_DRIVE_CMD, &args)) { | ||
820 | if (errno != EIO || args[0] != 0 || args[1] != 0) { | ||
821 | state = -1; /* "unknown"; */ | ||
822 | } else | ||
823 | state = 0; /* "sleeping"; */ | ||
824 | } else { | ||
825 | state = (args[2] == 255) ? 1 : 0; | ||
826 | } | ||
827 | D(printf(" drive state is: %d\n", state)); | ||
828 | |||
829 | return state; | ||
830 | } | ||
831 | |||
832 | char *state_name(int i) | ||
833 | { | ||
834 | if (i == -1) return "unknown"; | ||
835 | if (i == 0) return "sleeping"; | ||
836 | if (i == 1) return "active"; | ||
837 | |||
838 | return "internal error"; | ||
839 | } | ||
840 | |||
841 | char *myctime(time_t time) | ||
842 | { | ||
843 | char *ts = ctime(&time); | ||
844 | ts[strlen(ts) - 1] = 0; | ||
845 | |||
846 | return ts; | ||
847 | } | ||
848 | |||
849 | void measure(int fd) | ||
850 | { | ||
851 | time_t start_time; | ||
852 | int last_state; | ||
853 | time_t last_time; | ||
854 | int curr_state; | ||
855 | time_t curr_time = 0; | ||
856 | time_t time_diff; | ||
857 | time_t active_time = 0; | ||
858 | time_t sleep_time = 0; | ||
859 | time_t unknown_time = 0; | ||
860 | time_t total_time = 0; | ||
861 | int changes = 0; | ||
862 | float tmp; | ||
863 | |||
864 | printf("Starting measurements\n"); | ||
865 | |||
866 | last_state = check_powermode(fd); | ||
867 | start_time = last_time = time(0); | ||
868 | printf(" System is in state %s\n\n", state_name(last_state)); | ||
869 | |||
870 | while(!endit) { | ||
871 | sleep(1); | ||
872 | curr_state = check_powermode(fd); | ||
873 | |||
874 | if (curr_state != last_state || endit) { | ||
875 | changes++; | ||
876 | curr_time = time(0); | ||
877 | time_diff = curr_time - last_time; | ||
878 | |||
879 | if (last_state == 1) active_time += time_diff; | ||
880 | else if (last_state == 0) sleep_time += time_diff; | ||
881 | else unknown_time += time_diff; | ||
882 | |||
883 | last_state = curr_state; | ||
884 | last_time = curr_time; | ||
885 | |||
886 | printf("%s: State-change to %s\n", myctime(curr_time), | ||
887 | state_name(curr_state)); | ||
888 | } | ||
889 | } | ||
890 | changes--; /* Compensate for SIGINT */ | ||
891 | |||
892 | total_time = time(0) - start_time; | ||
893 | printf("\nTotal running time: %lus\n", curr_time - start_time); | ||
894 | printf(" State changed %d times\n", changes); | ||
895 | |||
896 | tmp = (float)sleep_time / (float)total_time * 100; | ||
897 | printf(" Time in sleep state: %lus (%.2f%%)\n", sleep_time, tmp); | ||
898 | tmp = (float)active_time / (float)total_time * 100; | ||
899 | printf(" Time in active state: %lus (%.2f%%)\n", active_time, tmp); | ||
900 | tmp = (float)unknown_time / (float)total_time * 100; | ||
901 | printf(" Time in unknown state: %lus (%.2f%%)\n", unknown_time, tmp); | ||
902 | } | ||
903 | |||
904 | void ender(int s) | ||
905 | { | ||
906 | endit = 1; | ||
907 | } | ||
908 | |||
909 | void usage() | ||
910 | { | ||
911 | puts("usage: dslm [-w <time>] <disk>"); | ||
912 | exit(0); | ||
913 | } | ||
914 | |||
915 | int main(int argc, char **argv) | ||
916 | { | ||
917 | int fd; | ||
918 | char *disk = 0; | ||
919 | int settle_time = 60; | ||
920 | |||
921 | /* Parse the simple command-line */ | ||
922 | if (argc == 2) | ||
923 | disk = argv[1]; | ||
924 | else if (argc == 4) { | ||
925 | settle_time = atoi(argv[2]); | ||
926 | disk = argv[3]; | ||
927 | } else | ||
928 | usage(); | ||
929 | |||
930 | if (!(fd = open(disk, O_RDONLY|O_NONBLOCK))) { | ||
931 | printf("Can't open %s, because: %s\n", disk, strerror(errno)); | ||
932 | exit(-1); | ||
933 | } | ||
934 | |||
935 | if (settle_time) { | ||
936 | printf("Waiting %d seconds for the system to settle down to " | ||
937 | "'normal'\n", settle_time); | ||
938 | sleep(settle_time); | ||
939 | } else | ||
940 | puts("Not waiting for system to settle down"); | ||
941 | |||
942 | signal(SIGINT, ender); | ||
943 | |||
944 | measure(fd); | ||
945 | |||
946 | close(fd); | ||
947 | |||
948 | return 0; | ||
949 | } | ||
950 | ---------------------------dslm.c END------------------------------------------- | ||