Use monotonic clock for measuring intervals in tests.

[bzbarsky-apple]

This way we won't get spurious timeouts from clock changes.

Problem

Wall clock being used for measuring time intervals.

Change overview

Use monotonic clock.

Testing

Ran tests locally.

[github-actions]

PR #19659: Size comparison from 1e3f120 to 877cd98

Increases (3 builds for cc13x2_26x2, esp32)

platform	target	config	section	1e3f120	877cd98	change	% change
cc13x2_26x2	lock-mtd	LP_CC2652R7	(read only)	638559	638567	8	0.0
			.text	539116	539124	8	0.0
	pump-app	LP_CC2652R7	(read only)	670127	670135	8	0.0
			.text	582476	582484	8	0.0
esp32	all-clusters-app	c3devkit	(read only)	1011250	1011252	2	0.0
			.flash.text	1011250	1011252	2	0.0

Decreases (3 builds for cc13x2_26x2, telink)

platform	target	config	section	1e3f120	877cd98	change	% change
cc13x2_26x2	pump-app	LP_CC2652R7	(read/write)	171712	171704	-8	-0.0
telink	light-switch-app	tlsr9518adk80d	(read/write)	787564	787556	-8	-0.0
			text	558266	558262	-4	-0.0
	lighting-app	tlsr9518adk80d	text	574728	574726	-2	-0.0

Full report (41 builds for cc13x2_26x2, cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, p6, telink)

platform	target	config	section	1e3f120	877cd98	change	% change
cc13x2_26x2	all-clusters-app	LP_CC2652R7	(read only)	658255	658255	0	0.0
			(read/write)	192584	192584	0	0.0
			.bss	73732	73732	0	0.0
			.data	3356	3356	0	0.0
			.rodata	86983	86983	0	0.0
			.text	570960	570960	0	0.0
	all-clusters-minimal-app	LP_CC2652R7	(read only)	646731	646731	0	0.0
			(read/write)	157292	157292	0	0.0
			.bss	73020	73020	0	0.0
			.data	3356	3356	0	0.0
			.rodata	90315	90315	0	0.0
			.text	556096	556096	0	0.0
	lock-ftd	LP_CC2652R7	(read only)	689151	689151	0	0.0
			(read/write)	151800	151800	0	0.0
			.bss	70732	70732	0	0.0
			.data	3280	3280	0	0.0
			.rodata	99071	99071	0	0.0
			.text	589596	589596	0	0.0
	lock-mtd	LP_CC2652R7	(read only)	638559	638567	8	0.0
			(read/write)	143864	143864	0	0.0
			.bss	66468	66468	0	0.0
			.data	3280	3280	0	0.0
			.rodata	98951	98951	0	0.0
			.text	539116	539124	8	0.0
	pump-app	LP_CC2652R7	(read only)	670127	670135	8	0.0
			(read/write)	171712	171704	-8	-0.0
			.bss	70852	70852	0	0.0
			.data	3280	3280	0	0.0
			.rodata	87167	87167	0	0.0
			.text	582476	582484	8	0.0
	pump-controller-app	LP_CC2652R7	(read only)	661115	661115	0	0.0
			(read/write)	180852	180852	0	0.0
			.bss	70980	70980	0	0.0
			.data	3276	3276	0	0.0
			.rodata	85091	85091	0	0.0
			.text	575540	575540	0	0.0
	shell	LP_CC2652R7	(read only)	687654	687654	0	0.0
			(read/write)	158680	158680	0	0.0
			.bss	76028	76028	0	0.0
			.data	3360	3360	0	0.0
			.rodata	109566	109566	0	0.0
			.text	577776	577776	0	0.0
cyw30739	light	cyw930739m2evb_01	(read/write)	611434	611434	0	0.0
			.app_xip_area	468124	468124	0	0.0
			.bss	86264	86264	0	0.0
			.data	728	728	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
	lock	cyw930739m2evb_01	(read/write)	608750	608750	0	0.0
			.app_xip_area	465264	465264	0	0.0
			.bss	86440	86440	0	0.0
			.data	732	732	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
	ota-requestor-no-progress-logging	cyw930739m2evb_01	(read/write)	614770	614770	0	0.0
			.app_xip_area	472348	472348	0	0.0
			.bss	85432	85432	0	0.0
			.data	672	672	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
efr32	lighting-app	BRD4161A	(read only)	921948	921948	0	0.0
			(read/write)	132392	132392	0	0.0
			.bss	130312	130312	0	0.0
			.data	2080	2080	0	0.0
			.text	921940	921940	0	0.0
		BRD4161A+rpc	(read only)	957652	957652	0	0.0
			(read/write)	149268	149268	0	0.0
			.bss	146984	146984	0	0.0
			.data	2284	2284	0	0.0
			.text	957644	957644	0	0.0
		BRD4161A+rs911x	(read only)	796984	796984	0	0.0
			(read/write)	128668	128668	0	0.0
			.bss	126580	126580	0	0.0
			.data	2088	2088	0	0.0
			.text	796976	796976	0	0.0
	lock-app	BRD4161A+wf200	(read only)	964264	964264	0	0.0
			(read/write)	129044	129044	0	0.0
			.bss	126956	126956	0	0.0
			.data	2088	2088	0	0.0
			.text	964256	964256	0	0.0
	window-app	BRD4161A	(read only)	907044	907044	0	0.0
			(read/write)	132492	132492	0	0.0
			.bss	130384	130384	0	0.0
			.data	2108	2108	0	0.0
			.text	907036	907036	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	1011250	1011252	2	0.0
			(read/write)	1482786	1482786	0	0.0
			.dram0.bss	69368	69368	0	0.0
			.dram0.data	14632	14632	0	0.0
			.flash.rodata	213344	213344	0	0.0
			.flash.text	1011250	1011252	2	0.0
			.iram0.text	62902	62902	0	0.0
		m5stack	(read only)	1065595	1065595	0	0.0
			(read/write)	484896	484896	0	0.0
			.dram0.bss	74888	74888	0	0.0
			.dram0.data	34144	34144	0	0.0
			.flash.rodata	243868	243868	0	0.0
			.flash.text	1060211	1060211	0	0.0
			.iram0.text	123267	123267	0	0.0
k32w	light	k32w061+release	(read/write)	657616	657616	0	0.0
			.bss	68732	68732	0	0.0
			.data	1992	1992	0	0.0
			.text	581092	581092	0	0.0
	lock	k32w061+release	(read/write)	719564	719564	0	0.0
			.bss	69172	69172	0	0.0
			.data	2000	2000	0	0.0
			.text	642592	642592	0	0.0
linux	all-clusters-app	debug	(read only)	2923265	2923265	0	0.0
			(read/write)	188528	188528	0	0.0
			.bss	95744	95744	0	0.0
			.data	2048	2048	0	0.0
			.data.rel.ro	84536	84536	0	0.0
			.dynamic	608	608	0	0.0
			.got	4536	4536	0	0.0
			.init	27	27	0	0.0
			.init_array	1032	1032	0	0.0
			.rodata	259357	259357	0	0.0
			.text	2487826	2487826	0	0.0
	all-clusters-minimal-app	debug	(read only)	2776977	2776977	0	0.0
			(read/write)	180432	180432	0	0.0
			.bss	95072	95072	0	0.0
			.data	2048	2048	0	0.0
			.data.rel.ro	77176	77176	0	0.0
			.dynamic	608	608	0	0.0
			.got	4488	4488	0	0.0
			.init	27	27	0	0.0
			.init_array	1032	1032	0	0.0
			.rodata	260893	260893	0	0.0
			.text	2342178	2342178	0	0.0
	bridge-app	debug+rpc	(read only)	2279705	2279705	0	0.0
			(read/write)	159296	159296	0	0.0
			.bss	83136	83136	0	0.0
			.data	3792	3792	0	0.0
			.data.rel.ro	66600	66600	0	0.0
			.dynamic	608	608	0	0.0
			.got	4392	4392	0	0.0
			.init	27	27	0	0.0
			.init_array	728	728	0	0.0
			.rodata	194240	194240	0	0.0
			.text	1924690	1924690	0	0.0
	chip-tool	debug	(read only)	10082645	10082645	0	0.0
			(read/write)	610376	610376	0	0.0
			.bss	24352	24352	0	0.0
			.data	1088	1088	0	0.0
			.data.rel.ro	578656	578656	0	0.0
			.dynamic	624	624	0	0.0
			.got	5008	5008	0	0.0
			.init	27	27	0	0.0
			.init_array	640	640	0	0.0
			.rodata	503829	503829	0	0.0
			.text	8171141	8171141	0	0.0
	chip-tool-no-interactive-ipv6only	arm64	(read only)	9827772	9827772	0	0.0
			(read/write)	675041	675041	0	0.0
			.bss	42625	42625	0	0.0
			.data	1152	1152	0	0.0
			.data.rel.ro	614024	614024	0	0.0
			.dynamic	528	528	0	0.0
			.got	13424	13424	0	0.0
			.init	24	24	0	0.0
			.init_array	192	192	0	0.0
			.rodata	467708	467708	0	0.0
			.text	7821684	7821684	0	0.0
	lighting-app	debug+rpc	(read only)	2512441	2512441	0	0.0
			(read/write)	163320	163320	0	0.0
			.bss	83616	83616	0	0.0
			.data	2064	2064	0	0.0
			.data.rel.ro	71752	71752	0	0.0
			.dynamic	608	608	0	0.0
			.got	4424	4424	0	0.0
			.init	27	27	0	0.0
			.init_array	816	816	0	0.0
			.rodata	209992	209992	0	0.0
			.text	2133058	2133058	0	0.0
	lock-app	debug	(read only)	2451113	2451113	0	0.0
			(read/write)	157968	157968	0	0.0
			.bss	82016	82016	0	0.0
			.data	1680	1680	0	0.0
			.data.rel.ro	68440	68440	0	0.0
			.dynamic	608	608	0	0.0
			.got	4424	4424	0	0.0
			.init	27	27	0	0.0
			.init_array	776	776	0	0.0
			.rodata	223688	223688	0	0.0
			.text	2063458	2063458	0	0.0
	ota-provider-app	debug	(read only)	2289049	2289049	0	0.0
			(read/write)	152136	152136	0	0.0
			.bss	81696	81696	0	0.0
			.data	1912	1912	0	0.0
			.data.rel.ro	62728	62728	0	0.0
			.dynamic	608	608	0	0.0
			.got	4488	4488	0	0.0
			.init	27	27	0	0.0
			.init_array	672	672	0	0.0
			.rodata	199864	199864	0	0.0
			.text	1927346	1927346	0	0.0
	ota-requestor-app	debug	(read only)	2404777	2404777	0	0.0
			(read/write)	158848	158848	0	0.0
			.bss	84000	84000	0	0.0
			.data	2200	2200	0	0.0
			.data.rel.ro	66808	66808	0	0.0
			.dynamic	608	608	0	0.0
			.got	4480	4480	0	0.0
			.init	27	27	0	0.0
			.init_array	728	728	0	0.0
			.rodata	203552	203552	0	0.0
			.text	2031154	2031154	0	0.0
	shell	debug	(read only)	2596777	2596777	0	0.0
			(read/write)	219192	219192	0	0.0
			.bss	134504	134504	0	0.0
			.data	1232	1232	0	0.0
			.data.rel.ro	77704	77704	0	0.0
			.dynamic	608	608	0	0.0
			.got	4168	4168	0	0.0
			.init	27	27	0	0.0
			.init_array	936	936	0	0.0
			.rodata	229650	229650	0	0.0
			.text	2207730	2207730	0	0.0
	thermostat-no-ble	arm64	(read only)	2564460	2564460	0	0.0
			(read/write)	192033	192033	0	0.0
			.bss	99473	99473	0	0.0
			.data	1688	1688	0	0.0
			.data.rel.ro	82776	82776	0	0.0
			.dynamic	528	528	0	0.0
			.got	5072	5072	0	0.0
			.init	24	24	0	0.0
			.init_array	400	400	0	0.0
			.rodata	163244	163244	0	0.0
			.text	2162448	2162448	0	0.0
	tv-app	debug	(read only)	3060985	3060985	0	0.0
			(read/write)	289224	289224	0	0.0
			.bss	199240	199240	0	0.0
			.data	4656	4656	0	0.0
			.data.rel.ro	78880	78880	0	0.0
			.dynamic	608	608	0	0.0
			.got	4840	4840	0	0.0
			.init	27	27	0	0.0
			.init_array	952	952	0	0.0
			.rodata	245600	245600	0	0.0
			.text	2628882	2628882	0	0.0
	tv-casting-app	debug	(read only)	5543801	5543801	0	0.0
			(read/write)	199832	199832	0	0.0
			.bss	88072	88072	0	0.0
			.data	2480	2480	0	0.0
			.data.rel.ro	103048	103048	0	0.0
			.dynamic	608	608	0	0.0
			.got	4712	4712	0	0.0
			.init	27	27	0	0.0
			.init_array	872	872	0	0.0
			.rodata	341129	341129	0	0.0
			.text	4926562	4926562	0	0.0
mbed	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2436264	2436264	0	0.0
			.bss	208180	208180	0	0.0
			.data	5864	5864	0	0.0
			.text	1398908	1398908	0	0.0
nrfconnect	all-clusters-app	nrf52840dk_nrf52840	(read/write)	1197451	1197451	0	0.0
			bss	141574	141574	0	0.0
			rodata	155580	155580	0	0.0
			text	821356	821356	0	0.0
	all-clusters-minimal-app	nrf52840dk_nrf52840	(read/write)	1145423	1145423	0	0.0
			bss	140826	140826	0	0.0
			rodata	132104	132104	0	0.0
			text	793576	793576	0	0.0
p6	all-clusters-app	default	(read/write)	2551576	2551576	0	0.0
			.bss	143360	143360	0	0.0
			.data	2776	2776	0	0.0
			.text	1509840	1509840	0	0.0
	all-clusters-minimal-app	default	(read/write)	2497424	2497424	0	0.0
			.bss	142640	142640	0	0.0
			.data	2776	2776	0	0.0
			.text	1455688	1455688	0	0.0
	light-app	default	(read/write)	2428160	2428160	0	0.0
			.bss	134720	134720	0	0.0
			.data	2592	2592	0	0.0
			.text	1386424	1386424	0	0.0
	lock-app	default	(read/write)	2448800	2448800	0	0.0
			.bss	134544	134544	0	0.0
			.data	2600	2600	0	0.0
			.text	1407064	1407064	0	0.0
telink	light-switch-app	tlsr9518adk80d	(read/write)	787564	787556	-8	-0.0
			bss	69868	69868	0	0.0
			noinit	40416	40416	0	0.0
			text	558266	558262	-4	-0.0
	lighting-app	tlsr9518adk80d	(read/write)	807268	807268	0	0.0
			bss	70116	70116	0	0.0
			noinit	40416	40416	0	0.0
			text	574728	574726	-2	-0.0