Hi Daniel,
On Thu, Jul 30, 2015 at 01:54:32PM +0200, Daniel Schultz wrote:
> This tool will help to measure the system performance.
>
> Some SoCs haven't the possibility to route their clocks to the output pins.
> So you can use dhrystone to get a feedback about the clock speed.
>
> Signed-off-by: Daniel Schultz <d.schultz@xxxxxxxxx>
> ---
>
> +enum idents compare_chars(char char_1, char char_2)
All functions only used locally should be static.
> +{
> + if (char_1 != char_2) {
> + return ident_1;
> + } else { /* should not executed */
> + char_1_glob = char_1;
> + return ident_2;
> + }
> +}
> +
> +bool compare_strs(char str_1[31], char str_2[31])
> +{
> + int offset;
> +
> + offset = 2;
> + while (offset <= 2)
> + if (compare_chars(str_1[offset], str_2[offset+1]) == ident_1)
> + ++offset;
> + if (strcmp(str_1, str_2) > 0) {
> + int_glob = offset + 7;
> + return true;
> + } else {
> + return false;
> + }
> +
> +}
> +
> +bool check_ident(enum idents ident)
> +{
> + if (ident == ident_3)
> + return true;
> + else
> + return false;
> +}
> +
> +static void execution(u32 number_of_runs, u64 *start_time, u64 *end_time)
> +{
> + int int_1;
> + int int_2;
> + int int_3;
> + char char_i;
> + enum idents ident;
> + char str_1[31];
> + char str_2[31];
> + int i;
> +
> + ident = ident_2; /* prevent compiler warning */
> + int_2 = 0; /* prevent compiler warning */
> + int_3 = 0; /* prevent compiler warning */
> +
> + record_glob->ptr_comp = next_record_glob;
> + record_glob->discr = ident_1;
> + record_glob->variant.var_1.enum_comp = ident_3;
> + record_glob->variant.var_1.int_comp = 40;
> + strcpy(record_glob->variant.var_1.str_comp,
> + "DHRYSTONE PROGRAM, SOME STRING");
> + strcpy(str_1, "DHRYSTONE PROGRAM, 1'ST STRING");
> +
> + arr_2_glob[8][7] = 10;
> + /* Was missing in published program. Without this statement, */
> + /* arr_2_glob [8][7] would have an undefined value. */
> + /* Warning: With 16-Bit processors and number_of_runs > 32000, */
> + /* overflow may occur for this array element. */
> +
> + /***************/
> + /* Start timer */
> + /***************/
> + *start_time = get_time_ns();
What I aimed at was a behaviour like outlined below, basically a
run-until-enough-time-elapsed:
static void dhrystone(int number_of_runs, u64 *difftime)
{
u64 start;
int now;
if (number_of_runs)
now = number_of_runs;
else
now = 10000;
start = get_time_ns();
again:
for (i = 0; i < now; i++)
do_one_run;
*difftime = get_time_ns() - start;
if (number_of_runs)
return;
if (*difftime < TOO_SMALL_TIME)
goto again;
}
Other than that this version looks much better than the last one, we're
getting closer ;)
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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