On 26 February 2018 at 16:58, Zbigniew Jędrzejewski-Szmek
wrote:
[..]
>
> > Can you repeat above and show output of the command "size /var/tmp/inst-*"?
>
> After stripping:
> 24808 /var/tmp/inst-O2
> 21060 /var/tmp/inst-O2-lto
> 22240 /var/tmp/inst-O3
> 21812 /v
On Mon, Feb 26, 2018 at 04:47:31PM +, Tomasz Kłoczko wrote:
> On 26 February 2018 at 07:11, Zbigniew Jędrzejewski-Szmek > wrote:
>
> > On Mon, Feb 26, 2018 at 05:24:28AM +0100, Kevin Kofler wrote:
> > > Zbigniew Jędrzejewski-Szmek wrote:
> > > > But size is easy:
> > > > $ du -s /var/tmp/inst
On 26 February 2018 at 07:11, Zbigniew Jędrzejewski-Szmek wrote:
> On Mon, Feb 26, 2018 at 05:24:28AM +0100, Kevin Kofler wrote:
> > Zbigniew Jędrzejewski-Szmek wrote:
> > > But size is easy:
> > > $ du -s /var/tmp/inst-O*
> > > 74428 /var/tmp/inst-O3
> > > 56136 /var/tmp/inst-O3-lto
> > > 61992
On Sun, 2018-02-25 at 13:19 +0100, Florian Weimer wrote:
> On 02/25/2018 12:45 PM, Zbigniew Jędrzejewski-Szmek wrote:
> > > What's our current take on using LTO for Fedora package builds?
> > systemd would like to use it.
>
> Why? What are the benefits?
I've seen a couple of cases where LTO find
On 02/26/2018 07:11 UTC, Zbigniew Jędrzejewski-Szmek wrote:
(Note, it's all unstripped.)
It would be interesting to apply /usr/bin/size, then sum the columns.
Similarly for the debuginfo, particularly the line numbers section.
Optimizations which re-schedule, move, or merge instructions
can ge
On Mon, Feb 26, 2018 at 05:24:28AM +0100, Kevin Kofler wrote:
> Zbigniew Jędrzejewski-Szmek wrote:
> > But size is easy:
> > $ du -s /var/tmp/inst-O*
> > 74428 /var/tmp/inst-O3
> > 56136 /var/tmp/inst-O3-lto
> > 61992 /var/tmp/inst-Os
> > 43572 /var/tmp/inst-Os-lto
>
> The current default is -O2,
Zbigniew Jędrzejewski-Szmek wrote:
> But size is easy:
> $ du -s /var/tmp/inst-O*
> 74428 /var/tmp/inst-O3
> 56136 /var/tmp/inst-O3-lto
> 61992 /var/tmp/inst-Os
> 43572 /var/tmp/inst-Os-lto
The current default is -O2, not -O3, though.
Kevin Kofler
_
On Sun, Feb 25, 2018 at 03:35:39PM +0100, Kevin Kofler wrote:
> Tomasz Kłoczko wrote:
> > BTW size. Did you try to compile systemd with optimisation for size (-Os)?
> >
> > There are many Linux packages which should be optimised for size
> > because they provide binaries which are speed critical l
On Sun, Feb 25, 2018 at 04:55:55PM +0100, Thomas Haller wrote:
> Hi,
>
> On Sun, 2018-02-25 at 12:30 +, Zbigniew Jędrzejewski-Szmek wrote:
> > On Sun, Feb 25, 2018 at 01:19:24PM +0100, Florian Weimer wrote:
> > > On 02/25/2018 12:45 PM, Zbigniew Jędrzejewski-Szmek wrote:
> > > > > What's our c
Hi,
On Sun, 2018-02-25 at 12:30 +, Zbigniew Jędrzejewski-Szmek wrote:
> On Sun, Feb 25, 2018 at 01:19:24PM +0100, Florian Weimer wrote:
> > On 02/25/2018 12:45 PM, Zbigniew Jędrzejewski-Szmek wrote:
> > > > What's our current take on using LTO for Fedora package builds?
> > > systemd would lik
On Sun, Feb 25, 2018 at 5:04 AM, Florian Weimer wrote:
> Some packages use LTO (link-time optimization) with the GNU toolchain.
>
> In the past, this was problematic because the generated debugging
> information was not quite usable. Today, it causes problems with some of
> the hardening quality
Tomasz Kłoczko wrote:
> BTW size. Did you try to compile systemd with optimisation for size (-Os)?
>
> There are many Linux packages which should be optimised for size
> because they provide binaries which are speed critical like boot
> loaders and boot tools (grub, lilo, gubby) some diagnostics a
On 25 February 2018 at 12:30, Zbigniew Jędrzejewski-Szmek
wrote:
> On Sun, Feb 25, 2018 at 01:19:24PM +0100, Florian Weimer wrote:
>> On 02/25/2018 12:45 PM, Zbigniew Jędrzejewski-Szmek wrote:
>> >>What's our current take on using LTO for Fedora package builds?
>>
>> >systemd would like to use it.
On Sun, Feb 25, 2018 at 01:19:24PM +0100, Florian Weimer wrote:
> On 02/25/2018 12:45 PM, Zbigniew Jędrzejewski-Szmek wrote:
> >>What's our current take on using LTO for Fedora package builds?
>
> >systemd would like to use it.
>
> Why? What are the benefits?
There's a small change in size. Whe
On 02/25/2018 12:45 PM, Zbigniew Jędrzejewski-Szmek wrote:
What's our current take on using LTO for Fedora package builds?
systemd would like to use it.
Why? What are the benefits?
Thanks,
Florian
___
devel mailing list -- devel@lists.fedoraproje
On Sun, Feb 25, 2018 at 11:04:46AM +0100, Florian Weimer wrote:
> Some packages use LTO (link-time optimization) with the GNU toolchain.
>
> In the past, this was problematic because the generated debugging
> information was not quite usable. Today, it causes problems with
> some of the hardening
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