[chiptest] Wait for subprocess instead of polling

[arkq]

Problem

Polling for subprocess return-code hogs CPU (chiptest Python process uses 100% CPU). Instead of polling it's better to use wait() call, which effectively puts Python process into sleep until subprocess terminates.

Change overview

• refactor active polling code and replace it with proper wait() calls.

Testing

Witch this changes, running ./scripts/tests/run_test_suite.py run does not show 100% CPU usage for run_test_suite.py process.

[github-actions]

PR #15968: Size comparison from 2822511 to a9bb972

Full report (26 builds for cyw30739, efr32, esp32, k32w, linux, nrfconnect, p6, telink)

platform	target	config	section	2822511	a9bb972	change	% change
cyw30739	light	cyw930739m2evb_01	(read/write)	601810	601810	0	0.0
			.app_xip_area	506352	506352	0	0.0
			.bss	78140	78140	0	0.0
			.data	660	660	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	lock	cyw930739m2evb_01	(read/write)	559722	559722	0	0.0
			.app_xip_area	465800	465800	0	0.0
			.bss	76644	76644	0	0.0
			.data	624	624	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	ota-requestor	cyw930739m2evb_01	(read/write)	581918	581918	0	0.0
			.app_xip_area	478316	478316	0	0.0
			.bss	85972	85972	0	0.0
			.data	592	592	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
efr32	lighting-app	BRD4161A	(read only)	920868	920868	0	0.0
			(read/write)	128848	128848	0	0.0
			.bss	126768	126768	0	0.0
			.data	2080	2080	0	0.0
			.text	920860	920860	0	0.0
		BRD4161A+rpc	(read only)	949688	949688	0	0.0
			(read/write)	144808	144808	0	0.0
			.bss	142544	142544	0	0.0
			.data	2260	2260	0	0.0
			.text	949680	949680	0	0.0
	window-app	BRD4161A	(read only)	853888	853888	0	0.0
			(read/write)	126840	126840	0	0.0
			.bss	124912	124912	0	0.0
			.data	1924	1924	0	0.0
			.text	853880	853880	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	957506	957506	0	0.0
			(read/write)	1393618	1393618	0	0.0
			.dram0.bss	63432	63432	0	0.0
			.dram0.data	14236	14236	0	0.0
			.flash.rodata	197032	197032	0	0.0
			.flash.text	957506	957506	0	0.0
			.iram0.text	62016	62016	0	0.0
		m5stack	(read only)	1012267	1012267	0	0.0
			(read/write)	460724	460724	0	0.0
			.dram0.bss	68960	68960	0	0.0
			.dram0.data	34080	34080	0	0.0
			.flash.rodata	225848	225848	0	0.0
			.flash.text	1006883	1006883	0	0.0
			.iram0.text	123107	123107	0	0.0
k32w	light	k32w061+release	(read/write)	694852	694852	0	0.0
			.bss	77704	77704	0	0.0
			.data	1964	1964	0	0.0
			.text	609384	609384	0	0.0
	lock	k32w061+release	(read/write)	696456	696456	0	0.0
			.bss	77672	77672	0	0.0
			.data	1972	1972	0	0.0
			.text	611012	611012	0	0.0
linux	all-clusters-app	debug	(read only)	2426809	2426809	0	0.0
			(read/write)	145600	145600	0	0.0
			.bss	60128	60128	0	0.0
			.data	1392	1392	0	0.0
			.data.rel.ro	78360	78360	0	0.0
			.dynamic	592	592	0	0.0
			.got	4176	4176	0	0.0
			.init	27	27	0	0.0
			.init_array	920	920	0	0.0
			.rodata	205509	205509	0	0.0
			.text	2058434	2058434	0	0.0
	bridge-app	debug+rpc	(read only)	1731837	1731837	0	0.0
			(read/write)	92560	92560	0	0.0
			.bss	47432	47432	0	0.0
			.data	2048	2048	0	0.0
			.data.rel.ro	38008	38008	0	0.0
			.dynamic	592	592	0	0.0
			.got	3928	3928	0	0.0
			.init	27	27	0	0.0
			.init_array	544	544	0	0.0
			.rodata	141748	141748	0	0.0
			.text	1474213	1474213	0	0.0
	chip-tool	debug	(read only)	9758533	9758533	0	0.0
			(read/write)	338488	338488	0	0.0
			.bss	25512	25512	0	0.0
			.data	1152	1152	0	0.0
			.data.rel.ro	305816	305816	0	0.0
			.dynamic	608	608	0	0.0
			.got	4776	4776	0	0.0
			.init	27	27	0	0.0
			.init_array	616	616	0	0.0
			.rodata	510868	510868	0	0.0
			.text	8508373	8508373	0	0.0
	chip-tool-ipv6only	arm64	(read only)	9430548	9430548	0	0.0
			(read/write)	454177	454177	0	0.0
			.bss	43825	43825	0	0.0
			.data	1200	1200	0	0.0
			.data.rel.ro	351000	351000	0	0.0
			.dynamic	560	560	0	0.0
			.got	54360	54360	0	0.0
			.init	24	24	0	0.0
			.init_array	192	192	0	0.0
			.rodata	486556	486556	0	0.0
			.text	7940244	7940244	0	0.0
	door-lock-app	debug	(read only)	1946161	1946161	0	0.0
			(read/write)	119008	119008	0	0.0
			.bss	50432	50432	0	0.0
			.data	1056	1056	0	0.0
			.data.rel.ro	62136	62136	0	0.0
			.dynamic	592	592	0	0.0
			.got	4112	4112	0	0.0
			.init	27	27	0	0.0
			.init_array	664	664	0	0.0
			.rodata	173660	173660	0	0.0
			.text	1623954	1623954	0	0.0
	lighting-app	debug+rpc	(read only)	2078233	2078233	0	0.0
			(read/write)	124376	124376	0	0.0
			.bss	51264	51264	0	0.0
			.data	1568	1568	0	0.0
			.data.rel.ro	66040	66040	0	0.0
			.dynamic	608	608	0	0.0
			.got	4144	4144	0	0.0
			.init	27	27	0	0.0
			.init_array	720	720	0	0.0
			.rodata	165852	165852	0	0.0
			.text	1756866	1756866	0	0.0
	ota-provider-app	debug	(read only)	1879017	1879017	0	0.0
			(read/write)	114640	114640	0	0.0
			.bss	50240	50240	0	0.0
			.data	1352	1352	0	0.0
			.data.rel.ro	57416	57416	0	0.0
			.dynamic	608	608	0	0.0
			.got	4368	4368	0	0.0
			.init	27	27	0	0.0
			.init_array	616	616	0	0.0
			.rodata	158899	158899	0	0.0
			.text	1569490	1569490	0	0.0
	ota-requestor-app	debug	(read only)	1901001	1901001	0	0.0
			(read/write)	117352	117352	0	0.0
			.bss	51296	51296	0	0.0
			.data	1512	1512	0	0.0
			.data.rel.ro	59112	59112	0	0.0
			.dynamic	592	592	0	0.0
			.got	4160	4160	0	0.0
			.init	27	27	0	0.0
			.init_array	640	640	0	0.0
			.rodata	154188	154188	0	0.0
			.text	1596850	1596850	0	0.0
	shell	debug	(read only)	2392969	2392969	0	0.0
			(read/write)	149752	149752	0	0.0
			.bss	70216	70216	0	0.0
			.data	864	864	0	0.0
			.data.rel.ro	73008	73008	0	0.0
			.dynamic	592	592	0	0.0
			.got	4160	4160	0	0.0
			.init	27	27	0	0.0
			.init_array	904	904	0	0.0
			.rodata	205458	205458	0	0.0
			.text	2031058	2031058	0	0.0
	thermostat-no-ble	arm64	(read only)	2174612	2174612	0	0.0
			(read/write)	148465	148465	0	0.0
			.bss	65201	65201	0	0.0
			.data	1080	1080	0	0.0
			.data.rel.ro	75000	75000	0	0.0
			.dynamic	560	560	0	0.0
			.got	4216	4216	0	0.0
			.init	24	24	0	0.0
			.init_array	352	352	0	0.0
			.rodata	133012	133012	0	0.0
			.text	1823312	1823312	0	0.0
	tv-app	debug	(read only)	2617097	2617097	0	0.0
			(read/write)	250648	250648	0	0.0
			.bss	167904	167904	0	0.0
			.data	3200	3200	0	0.0
			.data.rel.ro	73504	73504	0	0.0
			.dynamic	592	592	0	0.0
			.got	4544	4544	0	0.0
			.init	27	27	0	0.0
			.init_array	880	880	0	0.0
			.rodata	199453	199453	0	0.0
			.text	2243746	2243746	0	0.0
nrfconnect	all-clusters-app	nrf52840dk_nrf52840	(read/write)	1151827	1151827	0	0.0
			bss	146792	146792	0	0.0
			rodata	144300	144300	0	0.0
			text	785544	785544	0	0.0
p6	all-clusters-app	default	(read/write)	2494064	2494064	0	0.0
			.bss	119504	119504	0	0.0
			.data	2696	2696	0	0.0
			.text	1452328	1452328	0	0.0
	light-app	default	(read/write)	2397504	2397504	0	0.0
			.bss	112976	112976	0	0.0
			.data	2544	2544	0	0.0
			.text	1355768	1355768	0	0.0
	lock-app	default	(read/write)	2360936	2360936	0	0.0
			.bss	112720	112720	0	0.0
			.data	2504	2504	0	0.0
			.text	1319200	1319200	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	888986	888986	0	0.0
			bss	86928	86928	0	0.0
			noinit	37160	37160	0	0.0
			text	628350	628350	0	0.0

[woody-apple]

Fast tracking testing updates.