Signed-off-by: Amit Kucheria <amit.kuche...@linaro.org>
---
README | 7 +++++--
idlestat.c | 11 ++++++++---
2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/README b/README
index 3a8eb49..24485c5 100644
--- a/README
+++ b/README
@@ -28,14 +28,17 @@ Requirements
1. It must be run as root in order to access /sys/kernel/debug.
2. It requires tracing to be enabled in the kernel
+Help
+----
+./idlestat -h will show all the options
+
Example Usage
-------------
-./idlestat -d -o myoutput -t 10
+./idlestat -o /tmp/myoutput -t 10
where,
--d : dump the states at the end
-o : output file to store the traces
-t : the duration in seconds
diff --git a/idlestat.c b/idlestat.c
index c4a405a..849b6dd 100644
--- a/idlestat.c
+++ b/idlestat.c
@@ -946,8 +946,12 @@ struct cpuidle_cstates *physical_cluster_data(struct
cpu_physical *s_phy)
static void help(const char *cmd)
{
fprintf(stderr,
- "%s [-m|--dump] [-t <seconds>] -o|--output-file <file>\n",
+ "\nUsage:\n%s -o|--output-file <file> [-m|--dump]"
+ " [-t|--duration <seconds>] [-i|--iterations <number>]"
+ " [-d|--debug]\n",
basename(cmd));
+ fprintf(stderr,
+ "\nExample:\n%s -o /tmp/myoutput -t 30\n", basename(cmd));
}
static void version(const char *cmd)
@@ -1017,12 +1021,13 @@ int getoptions(int argc, char *argv[], struct
idledebug_options *options)
break;
case ':': /* missing option argument */
fprintf(stderr, "%s: option `-%c' requires an
argument\n",
- argv[0], optopt);
+ basename(argv[0]), optopt);
return -1;
case '?': /* invalid option */
default:
fprintf(stderr, "%s: Unknown option `-%c'.\n",
- argv[0], optopt);
+ basename(argv[0]), optopt);
+ help(argv[0]);
return -1;
}
}
--
1.9.1
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