On 16/03/2023 11.22, Andrew Randrianasulu wrote:
>
>
> чт, 16 мар. 2023 г., 12:17 Andrew Randrianasulu <randrianasulu@gmail.com
> <mailto:randrianasulu@gmail.com>>:
>
>
>
> чт, 16 мар. 2023 г., 11:31 Thomas Huth <thuth@redhat.com
> <mailto:thuth@redhat.com>>:
>
> On 16/03/2023 08.36, Philippe Mathieu-Daudé wrote:
> > On 16/3/23 08:17, Andrew Randrianasulu wrote:
> >>
> >> чт, 16 мар. 2023 г., 10:05 Philippe Mathieu-Daudé
> <philmd@linaro.org <mailto:philmd@linaro.org>
> >> <mailto:philmd@linaro.org <mailto:philmd@linaro.org>>>:
> >>
> >> Hi Andrew,
> >>
> >> On 16/3/23 01:57, Andrew Randrianasulu wrote:
> >> > Looking at https://wiki.qemu.org/ChangeLog/8.0
> <https://wiki.qemu.org/ChangeLog/8.0>
> >> <https://wiki.qemu.org/ChangeLog/8.0
> <https://wiki.qemu.org/ChangeLog/8.0>>
> >> > <https://wiki.qemu.org/ChangeLog/8.0
> <https://wiki.qemu.org/ChangeLog/8.0>
> >> <https://wiki.qemu.org/ChangeLog/8.0
> <https://wiki.qemu.org/ChangeLog/8.0>>>
> >> >
> >> > ===
> >> > System emulation on 32-bit x86 and ARM hosts has been
> deprecated.
> >> The
> >> > QEMU project no longer considers 32-bit x86 and ARM
> support for
> >> system
> >> > emulation to be an effective use of its limited
> resources, and thus
> >> > intends to discontinue.
> >> >
> >> > ==
> >> >
> >> > well, I guess arguing from memory-consuption point on 32
> bit x86
> >> hosts
> >> > (like my machine where I run 32 bit userspace on 64 bit
> kernel)
>
> All current PCs have multiple gigabytes of RAM, so using a 32-bit
> userspace
> to save some few bytes sounds weird.
>
>
> I think difference more like in 20-30% (on disk and in ram), not *few
> bytes*.
>
>
> I stand (self) corrected on *on disk* binary size, this parameter tend to be
> ~same between bash / php binaries from Slackware 15.0 i586/x86_64. I do not
> have full identical x64 Slackware setup for measuring memory impact.
>
>
> Still, pushing users into endless hw upgrade is no fun:
>
> https://hackaday.com/2023/02/28/repurposing-old-smartphones-when-reusing-makes-more-sense-than-recycling/ >
>
> note e-waste and energy consumption
Now you're mixing things quite badly. That would be an argument in the years
before 2010 maybe, when not everybody had a 64-bit processor in their PC
yet, but it's been now more than 12 years that all recent Desktop processors
===
Laptops, tablets etc exist.
feature 64-bit mode. So if QEMU stops supporting 32-bit x86 environments,
this is not forcing you to buy a new hardware, since you're having a 64-bit
hardware already anyway. If someone still has plain 32-bit x86 hardware
around for their daily use, that's certainly not a piece of hardware you
want to run QEMU on, since it's older than 12 years already, and thus not
really strong enough to run a recent emulator in a recent way.
Well, current qemu runs quite well, than you very much (modulo all this twiddling with command line switches). I think very fact it runs well (even as tcg-only emulator, on integer tasks at least) on 32-bit hosts actually good, and if 32-bit arm hardware can keep some codeways in working state for me - even better.
But may be qemu as emulator and qemu as industrial hypervisor actually better to live separate lives? I do not know future, just dislike direction winds are blowing .... since long time, really.