On Tue, 2018-03-06 at 15:11 -0800, Zac Medico wrote:
> On 03/06/2018 02:10 PM, Joakim Tjernlund wrote:
> > .. using portage 2.3.24 on our embedded target(ppc329 It takes forever, >
> > 10 mins) to just do the
> > dependencies for emerge -aNDuv world
> > Here is what strace says, one can see portage is rereading the profile over
> > and over again.
> > At this point I am prepared to try anything to eliminate the rereading of
> > the profile, any pointers?
> >
> > 23:04:25.472818 _llseek(5, 0, [0], SEEK_CUR) = 0
> > 23:04:25.472978 read(5, "# Copyright 1999-2015 Gentoo Fou"..., 32768) = 677
> > 23:04:25.473099 read(5, "", 28672) = 0
> > 23:04:25.473228 read(5, "", 32768) = 0
> > 23:04:25.473366 close(5) = 0
> > 23:04:25.482102 stat64("/usr/portage/profiles/base/profile.bashrc",
> > {st_mode=S_IFREG|0644, st_size=183, ...}) = 0
> > 23:04:25.482509
> > stat64("/usr/portage/profiles/default/linux/profile.bashrc", 0xbfe61330) =
> > -1 ENOENT (No such file or directory)
> > 23:04:25.482887 stat64("/usr/portage/profiles/arch/base/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.483240 stat64("/usr/portage/profiles/arch/powerpc/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.483594
> > stat64("/usr/portage/profiles/default/linux/powerpc/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.483924 stat64("/usr/portage/profiles/arch/base/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.484269 stat64("/usr/portage/profiles/arch/powerpc/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.484604
> > stat64("/usr/portage/profiles/arch/powerpc/ppc32/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.484930
> > stat64("/usr/portage/profiles/default/linux/powerpc/ppc32/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.485272 stat64("/usr/portage/profiles/releases/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.485615
> > stat64("/usr/portage/profiles/releases/13.0/profile.bashrc", 0xbfe61330) =
> > -1 ENOENT (No such file or directory)
> > 23:04:25.485944
> > stat64("/usr/portage/profiles/default/linux/powerpc/ppc32/13.0/profile.bashrc",
> > 0xbfe61330) = -1 ENOENT (No such file or directory)
> > 23:04:25.486329
> > stat64("/usr/local/portage/tmv3-target-overlay/profiles/cusfpv3/profile.bashrc",
> > {st_mode=S_IFREG|0644, st_size=133, ...}) = 0
> > 23:04:25.486764 stat64("/etc/portage/profile/profile.bashrc", 0xbfe61330) =
> > -1 ENOENT (No such file or directory)
>
> The profile.bashrc stat calls are repeated for every setcpv call here:
>
> https://gitweb.gentoo.org/proj/portage.git/tree/pym/portage/package/ebuild/config.py?h=portage-2.3.24#n1614
>
> We can easily perform the stat calls in the constructor, and save the
> results in an attribute, like when we initialize self._pbashrcdict.
>
> Bug filed: https://bugs.gentoo.org/649806
Nice! One you got a patch I will try it out.
Desperate, I downgraded to portage 2.2.26 and now portage runs a lot faster! No
measurements
though as I need to complete the upgrade of our system ASAP.
Does this make any sense to you?
Jocke
