From: Mike Frysinger <vapier@gentoo.org>
To: gentoo-portage-dev@lists.gentoo.org
Subject: Re: [gentoo-portage-dev] [PATCH] Add repoman check to warn if src_prepare/src_configure are used in EAPI 0/1
Date: Mon, 20 Jan 2014 00:47:29 -0500 [thread overview]
Message-ID: <201401200047.29971.vapier@gentoo.org> (raw)
In-Reply-To: <CAJ0EP42DQznDAkVGgvijdNrbVD05nFgWyrG4YVgKSXeoc=-Z1Q@mail.gmail.com>
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On Sunday 19 January 2014 11:59:36 Mike Gilbert wrote:
> On Sun, Jan 19, 2014 at 4:44 AM, Mike Frysinger <vapier@gentoo.org> wrote:
> > Chromium OS for a long time was restricted to EAPI 4 for two reasons --
> > it had an old portage version (and upgrading to a newer one regressed
> > performance significantly, so we held off until we could figure out why)
>
> I am curious to know more about the performance regression if you can
> share. Is that something that got fixed, or did you disable some
> features (like the slot-operator stuff)?
we finally tracked it down (was due to new the new FEATURES=merge-sync option.
when you're installing 200 to 500 binary packages (with like 32 in parallel),
that can easily choke your throughput. some systems saw really excessive
latencies (which i would guess was due to their drive taking longer to process
dirty blocks). but it took us some time to figure that out as we were making a
large version jump and we didn't have too much time to dedicate to tracking it
down. lots o bugs to fix.
-mike
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next prev parent reply other threads:[~2014-01-20 5:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-19 16:59 [gentoo-portage-dev] [PATCH] Add repoman check to warn if src_prepare/src_configure are used in EAPI 0/1 Mike Gilbert
2014-01-20 5:47 ` Mike Frysinger [this message]
2014-01-20 6:02 ` Alec Warner
2014-01-20 6:40 ` Mike Frysinger
-- strict thread matches above, loose matches on Subject: below --
2014-01-14 0:08 creffett
2014-01-14 0:50 ` Mike Frysinger
2014-01-14 3:23 ` Tom Wijsman
2014-01-14 4:59 ` Mike Frysinger
2014-01-14 5:37 ` Brian Dolbec
2014-01-14 6:37 ` Mike Frysinger
2014-01-14 21:15 ` Tom Wijsman
2014-01-19 9:44 ` Mike Frysinger
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