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------------------------------------------- | ||
