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sys: sort out ztimer_xtimer_compat and ztimer64_xtimer_compat depes #17732

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merged 4 commits into from Mar 4, 2022
Merged

sys: sort out ztimer_xtimer_compat and ztimer64_xtimer_compat depes #17732

merged 4 commits into from Mar 4, 2022

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fjmolinas
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This PR splits from #17365 all modules depending on 64bit features of xtimer. It allows not using 64bit if not needed, note that because of newlib this is actually used most of the time (a nice case to optimize @kfessel)

In cases where there was already a ztimer based alternative for xtimer, those get used instead.

Note that some might still be missed as covered in the build but some of these modules.

Testing procedure

  • Green murdock

Issues/PRs references

Split from #17365

@fjmolinas fjmolinas added the CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR label Mar 2, 2022
@github-actions github-actions bot added Area: cpu Area: CPU/MCU ports Area: Kconfig Area: Kconfig integration Area: network Area: Networking Area: sys Area: System Area: timers Area: timer subsystems Platform: native Platform: This PR/issue effects the native platform labels Mar 2, 2022
@fjmolinas
sys/trickle: if ztimer_xtimer_compat is used, use ztimer_msec
fc169b9 
If already using the compat layer then just use ztimer_msec otherwise
the 64bit compat layer would be needed for this module
@fjmolinas
sys: if xtimer_ztimer_compat, evtimer uses ztimer
bf83387 
The xtimer based module was only there to avoid duplicate code,
is the compat layer is used this does not make sense.
fjmolinas
fjmolinas commented Mar 2, 2022
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sys/Makefile.dep Outdated
Comment on lines 338 to 343
ifneq (,$(filter sema,$(USEMODULE)))
ifneq (,$(filter ztimer_xtimer_compat,$(USEMODULE)))
# sema_timed required 64bit
USEMODULE += ztimer64_xtimer_compat
endif
endif
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With #17115 this dependency can be moved to only tests/sema and posix_semaphore

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lets wait for it

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I removed it then

@fjmolinas
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because of newlib this is actually used most of the time (a nice case to optimize @kfessel)

I think we could make gettimeofday part of a pseudomodule newlib_syscalls_gettimeofday and native_syscalls_gettimeofday, there probably are not many users in the tree, but I would rather leave this for a follow-up, it does not make the current situation worse, and with this PR as it is I know #17365 passes, and therefore I can move forward with #17721.

The sema change I would like to address in this PR if lwip change gets in.

@fjmolinas fjmolinas mentioned this pull request Mar 2, 2022
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kfessel commented Mar 2, 2022

gettimeofday might also be an easy port to ztimer_msec but this is for another PR

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gettimeofday might also be an easy port to ztimer_msec but this is for another PR

I think it requires usec though...

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kfessel commented Mar 2, 2022 •
edited

gettimeofday might also be an easy port to ztimer_msec but this is for another PR

I think it requires usec though...

https://pubs.opengroup.org/onlinepubs/009604599/functions/gettimeofday.html

"The resolution of the system clock is unspecified." -> we can do to the resolution what ever we want

also refers to ftime() which has millisecond resolution in its type (and still includes that sentence about the system clock resolution)

actually 0 should be start of unix epoch might be the bigger posix breaker (it was changed somewhen)

@fjmolinas
sys: use ztimer64_xtimer_compat when required
6151895
@fjmolinas
sys/ztimer/Kconfig: remv dep between ztimer64_compat and ztimer_compat
f1d4cc0 
This is done to avoid circular dependency, it will currently allow for
ztimer64_xtimer_compat beeing selected as well as xtimer_on_ztimer.
This altough incorrect mimics make, and will be fixed when making
ztimer_xtimer_compat the default xtimer backend
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Seems like its all green here @kfessel

kfessel
kfessel approved these changes Mar 3, 2022
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rollin' rollin' rollin'

@fjmolinas fjmolinas merged commit 0c166b1 into RIOT-OS:master Mar 4, 2022
@fjmolinas fjmolinas deleted the pr_xtimer_compat_deps branch March 4, 2022 07:08
@OlegHahm OlegHahm added this to the Release 2022.04 milestone Apr 25, 2022
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