Hi George,
A change was included in version 6.0.3 with respect to 6.0.2 so that the
CPU should not be at 100% usage in easy mode. Could you tell me which
version you are using? In case you are using v6.0.3, could you tell me if
you are observing 100% CPU usage in easy mode?
There is no particular reason for not using readline, other than "legacy"
reasons. I will add an entry in the todo list to consider using it in the
future.
I cannot exactly tell you why 'stop' is checked in the source line you
mention. It is related to whether an active search is in progress or not.
It should not be the case, for instance, if the program is running in easy
mode and it is the opponent turn. Nevertheless, the main loop of the engine
comes from line 105 in protocol.cpp.
Cheers,
Antonio
On Fri, Jul 26, 2013 at 5:14 AM, George Pauly <ggpa...@gmail.com> wrote:
>
> Antonio Ceballos wrote:
>
> >
> > ...
> >
> > I will have a look into it as soon as I can. I will let you know of
> > any news. Meanwhile, any help is much appreciated.
> >
> >
> > Regards,
> > Antonio
>
> I'd like to use GNU chess to test a web interface-to-uci project, and
> this bug will be a problem.
>
>
> Referring to source code, starting at the console loop in
> engine/protocol.cpp, line 135 (quoted below).
>
> I haven't drilled down into this code to try to understand it in detail.
> Browsing it raises some questions:
>
> Why isn't GNU readline used for the console? Isn't readline the
> defacto standard?
>
> Can someone who has a better understanding of this than me advise if
> this code may (not) be responsible for the cpu racing?
>
> This is likely not relevant -- feel free to ignore this when you
> answer -- , but why is the uci stop command (means cleanly stop
> searching) referred to in the condition of the console while loop? fwiw
> entering a stop command does not affect the cpu racing.
>
>
> thanks,
>
> George Pauly
>
>
>
> > // event()
> >
> > void event() {
> >
> > while (!SearchInfo->stop && input_available()) loop_step();
> > }
> >
> > // loop_step()
> >
> > static void loop_step() {
> >
> > char string[65536];
> >
> > // read a line
> >
> > get(string,65536);
> >
> > // parse
> >
> > if (false) {
> >
> > } else if (string_start_with(string,"debug ")) {
> >
> > // dummy
> >
> > } else if (string_start_with(string,"go ")) {
> >
> > if (!Searching && !Delay) {
> > init();
> > parse_go(string);
> > } else {
> > ASSERT(false);
> > }
> >
> > } else if (string_equal(string,"isready")) {
> >
> > if (!Searching && !Delay) {
> > init();
> > }
> >
> > send("readyok"); // no need to wait when searching (dixit SMK)
> >
> > } else if (string_equal(string,"ponderhit")) {
> >
> > if (Searching) {
> >
> > ASSERT(Infinite);
> >
> > SearchInput->infinite = false;
> > Infinite = false;
> >
> > } else if (Delay) {
> >
> > send_best_move();
> > Delay = false;
> >
> > } else {
> >
> > ASSERT(false);
> > }
> >
> > } else if (string_start_with(string,"position ")) {
> >
> > if (!Searching && !Delay) {
> > init();
> > parse_position(string);
> > } else {
> > ASSERT(false);
> > }
> >
> > } else if (string_equal(string,"quit")) {
> >
> > ASSERT(!Searching);
> > ASSERT(!Delay);
> >
> > exit(EXIT_SUCCESS);
> >
> > } else if (string_start_with(string,"setoption ")) {
> >
> > if (!Searching && !Delay) {
> > parse_setoption(string);
> > } else {
> > ASSERT(false);
> > }
> >
> > } else if (string_equal(string,"stop")) {
> >
> > if (Searching) {
> >
> > SearchInfo->stop = true;
> > Infinite = false;
> >
> > } else if (Delay) {
> >
> > send_best_move();
> > Delay = false;
> > }
> >
> > } else if (string_equal(string,"uci")) {
> >
> > ASSERT(!Searching);
> > ASSERT(!Delay);
> >
> > send("id name GNU Chess " VERSION);
> > send("id author GNU Chess team");
> >
> > option_list();
> >
> > send("uciok");
> >
> > } else if (string_equal(string,"ucinewgame")) {
> >
> > if (!Searching && !Delay && Init) {
> > trans_clear(Trans);
> > } else {
> > ASSERT(false);
> > }
> >
> > } else if (string_equal(string,"hashon")) {
> >
> > UseTrans = true;
> >
> > } else if (string_equal(string,"hashoff")) {
> >
> > UseTrans = false;
> >
> > }
> > }
>
>
>
>
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