09293: kikikai: performance regression

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
09293	Speed	Minor	Always	3 days ago	1 day ago

Tester	Augusto	View Status	Public	Platform	MAME (Unofficial Binary)
Assigned To		Resolution	Invalid report	OS	Linux (64-bit)
Status [?]	Closed			Driver	taito/kikikai.cpp
Version	0.280	Fixed in Version		Build	x64
		Fixed in Git Commit		Github Pull Request #

Summary	09293: kikikai: performance regression
Description	That game is in same situation as was Tokio before the fix. Please see the bug report about Tokio. https://mametesters.org/view.php?id=9054 Kiki KaiKai are having much slowdown as never had before in MAME recent versions. That game use 2x Z80 6 MHz and MC6801U4 3 MHZ. Similar as Tokio. Now that game run between 75 to 90 % speed if cpu are using energy profile power saver and 220 % speed if using energy profile high performance. That arcade use simple graphics. The changes done in Z80 core not have done much slowdown in several games. That game was not supposed to have such slow performance. Perhaps that game are using quantum, but thus as Tokio quantum not is need.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	kikikai

Attached Files

No.23782 hap Developer 3 days ago	That's not really a bug. Anyway, this will probably work (needs a playthrough or two to test): config.set_perfect_quantum(m_maincpu); to: config.set_perfect_quantum(m_mcu);
No.23784 Augusto Tester 3 days ago	That hardware is similar as Tokio. In anyway the game has much slowdown.
No.23786 Robbbert Moderator 2 days ago	I'm getting 400%, so I can't confirm a problem.
No.23790 Augusto Tester 2 days ago	@Robbert You are using high end cpu ? Kiki Kaikai is an simple arcade with hardware similar as Tokio. Here using an AMD FX. Tokio run in 750 % and Kiki Kaikai in 220 %. Here even then of Z80 new core several games using multiple Z80 cpus not does any slowdown and run perfectly in cpu power profile power saver. I have tested several games and the only game doing slowdown when using cpu power profile power saver is Kiki Kaikai. Select cpu power profile high performance to run that 1986 arcade arcade with simple graphics ? Possibly Kiki Kaikai use quantum. In Tokio before quantum was changed the performance was similar as Kiki Kaikai. @hap The change to config.set_perfect_quantum(m_mcu); will be available in 0.282 ?
No.23796 Fujix Administrator 1 day ago	Augusto, Por que você considera que o hardware do kikikaikai e do tokio é idêntico apenas porque eles se parecem? Evite criar relatórios baseados apenas em semelhanças superficiais, sem qualquer justificativa técnica. Como grande parte dos seus relatórios carece de fundamentos adequados, você deve reconsiderar sua abordagem aos testes.
No.23802 hap Developer 1 day ago	No this quantum change will not be in 0.282. It will not be in 0.283 either unless it's thoroughly tested. If it can still be played through fine, my suggested change will give approx 3* speedup.
No.23805 hap Developer 1 day ago	I did one round of testing and got a lockup at the final boss. It could also be a side effect of cheats (I played with invincibility cheat enabled), and/or just unlucky and it would happen with perfect quantum on maincpu anyway.