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SubjectRe: [PATCH V8 07/14] rtla/timerlat: Add timerlat hist mode
On Mon, Nov 29, 2021 at 12:07:45PM +0100,
Daniel Bristot de Oliveira wrote:

> +static void timerlat_hist_usage(char *usage)
> +{
> + int i;
> +
> + char *msg[] = {
> + "",
> + " usage: [rtla] timerlat hist [-h] [-q] [-p us] [-i us] [-t us] [-s us] [-T[=file]] \\",
> + " [-c cpu-list] [-P priority] [--no-irq] [--no-thread] [--no-header] [--no-summary] \\",
> + " [--no-index] [--with-zeros]",
> + "",
> + " -h/--help: print this menu",
> + " -p/--period us: timerlat period in us",
> + " -i/--irq us: stop trace if the irq latency is higher than the argument in us",
> + " -T/--thread us: stop trace if the thread latency is higher than the argument in us",
> + " -s/--stack us: save the stack trace at the IRQ if a thread latency is higher than the argument in us",
> + " -c/--cpus cpus: run the tracer only on the given cpus",
> + " -d/--duration time[m|h|d]: duration of the session in seconds",
> + " -T/--trace[=file]: save the stopped trace to [file|timerlat_trace.txt]",
> + " -n/--nano: display data in nanoseconds",
> + " -b/--bucket-size N: set the histogram bucket size (default 1)",
> + " -e/--entries N: set the number of entries of the histogram (default 256)",
> + " --no-irq: ignore IRQ latencies",
> + " --no-thread: ignore thread latencies",
> + " --no-header: do not print header",
> + " --no-summary: do not print summary",
> + " --no-index: do not print index",
> + " --with-zeros: print zero only entries",
> + " -P/--priority o:prio|r:prio|f:prio|d:runtime:period : set scheduling parameters",
> + " o:prio - use SCHED_OTHER with prio",
> + " r:prio - use SCHED_RR with prio",
> + " f:prio - use SCHED_FIFO with prio",
> + " d:runtime[us|ms|s]:period[us|ms|s] - use SCHED_DEADLINE with runtime and period",
> + " in nanoseconds",
> + NULL,
> + };

[-t us] --> [-T us]
[-T[=file]] --> [-t[=file]]
[-d] [-b] [-e] [-n] lack in usage info. this is not important tho.

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