Two sub-commands... start and get. * start sets the reference. * get prints out the time since the last start (in "<sec>.<msec>" format). If get is called without start, returns time since boot. Simple way to benchmark an operation: "timer start;<commands-to-measure>;timer get"
Signed-off-by: Joe Hershberger joe.hershberger@ni.com --- common/cmd_misc.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/common/cmd_misc.c b/common/cmd_misc.c index 973b1c2..2d1f7b5 100644 --- a/common/cmd_misc.c +++ b/common/cmd_misc.c @@ -53,3 +53,28 @@ U_BOOT_CMD( "N\n" " - delay execution for N seconds (N is _decimal_ !!!)" ); + +int do_timer(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + static ulong start; + + if (argc != 2) + return CMD_RET_USAGE; + + if (!strcmp(argv[1], "start")) + start = get_timer(0); + + if (!strcmp(argv[1], "get")) { + ulong msecs = get_timer(start) * 1000 / CONFIG_SYS_HZ; + printf("%ld.%03d\n", msecs / 1000, (int)(msecs % 1000)); + } + + return 0; +} + +U_BOOT_CMD( + timer , 2, 1, do_timer, + "access the system timer", + "start - Reset the timer reference.\n" + "timer get - Print the time since 'start'." +);