On Thu, Jul 02, 2020 at 11:01:31AM +0800, Jingyi Wang wrote:
> Besides using separate running times parameter, we add time limit
> for loop_test to make sure each test should be done in a certain
> time(5 sec here).
>
> Signed-off-by: Jingyi Wang <[email protected]>
> ---
> arm/micro-bench.c | 17 +++++++++++------
> 1 file changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/arm/micro-bench.c b/arm/micro-bench.c
> index 506d2f9..4c962b7 100644
> --- a/arm/micro-bench.c
> +++ b/arm/micro-bench.c
> @@ -23,6 +23,7 @@
> #include <asm/gic-v3-its.h>
>
> #define NTIMES (1U << 16)
> +#define MAX_NS (5 * 1000 * 1000 * 1000UL)
How about naming this something like "NS_5_SECONDS"?
>
> static u32 cntfrq;
>
> @@ -258,22 +259,26 @@ static void loop_test(struct exit_test *test)
> uint64_t start, end, total_ticks, ntimes = 0;
> struct ns_time total_ns, avg_ns;
>
> + total_ticks = 0;
> if (test->prep) {
> if(!test->prep()) {
> printf("%s test skipped\n", test->name);
> return;
> }
> }
> - isb();
> - start = read_sysreg(cntpct_el0);
> - while (ntimes < test->times) {
> +
> + while (ntimes < test->times && total_ns.ns < MAX_NS) {
> + isb();
> + start = read_sysreg(cntpct_el0);
> test->exec();
> + isb();
> + end = read_sysreg(cntpct_el0);
> +
> ntimes++;
> + total_ticks += (end - start);
> + ticks_to_ns_time(total_ticks, &total_ns);
> }
> - isb();
> - end = read_sysreg(cntpct_el0);
>
> - total_ticks = end - start;
> ticks_to_ns_time(total_ticks, &total_ns);
> avg_ns.ns = total_ns.ns / ntimes;
> avg_ns.ns_frac = total_ns.ns_frac / ntimes;
> --
> 2.19.1
>
>
Thanks,
drew
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