From: Mikolaj Kucharski <mikolaj@kucharski.name>
Subject: How you generated got-update.png? (was: Optimized branch switching?)
To: Stefan Sperling <stsp@stsp.name>
Cc: gameoftrees@openbsd.org
Date: Tue, 13 Sep 2022 14:07:14 +0000

Hi Stefan!

Question unrelated to the thread. How did you generated file attached in
message quoted below?

It's this one https://marc.gameoftrees.org/mail/1663067411.14669_0.html
but there is no attchments in that online version of the email.


On Tue, Sep 13, 2022 at 12:34:49PM +0200, Stefan Sperling wrote:
> On Mon, Sep 12, 2022 at 10:45:05PM +0200, Christian Weisgerber wrote:
> > $ time got up 
> > Already up-to-date
> >     0m22.21s real     0m04.38s user     0m09.26s system
> > 
> > It's a slow machine (APU2).
> > So you're right, it's just the "got update" time.
> 
> > Looks like "got update" scales with the speed of the underlying
> > hardware, which isn't that surprising. :-)
> 
> It is even slower on my APU2, which is running 7.1; hopefully 7.2 will
> be faster with the mmap speedup that was committed. 
> 
> The attached profile trace graph suggests a bottleneck is in the open()
> call in get_file_status(). We might be able to work around that somehow.
> 
> My test results below:
> 
> $ gotadmin info /git/ports.git | grep ^pack
> pack files: 1
> packed objects: 1750824
> packed total size: 507M
> $ cd /usr/ports/
> $ got --version
> got 0.76-current
> $ time got update
> Already up-to-date
>     0m42.44s real     0m06.59s user     0m11.65s system
> $ time got update 
> Already up-to-date
>     0m32.93s real     0m05.60s user     0m10.62s system
> $ 
> 
> cpu0: AMD GX-412TC SOC, 998.25 MHz, 16-30-01
> 
> bios0 at mainbus0: SMBIOS rev. 3.0 @ 0xcfe81040 (13 entries)
> bios0: vendor coreboot version "v4.16.0.3" date 04/21/2022
> bios0: PC Engines apu2
> 
> sd0 at scsibus1 targ 0 lun 0: <ATA, SanDisk SSD U110, U21B> naa.5001b444a44c85f0
> sd0: 15272MB, 512 bytes/sector, 31277232 sectors, thin
> 
> Performance adjustment mode: manual (1000 MHz)



-- 
Regards,
 Mikolaj