To: "H. Peter Anvin" <hpa@zytor.com>
Cc: git@vger.kernel.org, nigel@nigel.suspend2.net,
       "J.H." <warthog9@kernel.org>, Randy Dunlap <randy.dunlap@oracle.com>,
       Andrew Morton <akpm@osdl.org>, Pavel Machek <pavel@ucw.cz>,
       kernel list <linux-kernel@vger.kernel.org>, webmaster@kernel.org
Subject: Re: How git affects kernel.org performance
References: <20061214223718.GA3816@elf.ucw.cz>
	<20061216094421.416a271e.randy.dunlap@oracle.com>
	<20061216095702.3e6f1d1f.akpm@osdl.org> <458434B0.4090506@oracle.com>
	<1166297434.26330.34.camel@localhost.localdomain>
	<1166304080.13548.8.camel@nigel.suspend2.net>
	<459152B1.9040106@zytor.com>
	<1168140954.2153.1.camel@nigel.suspend2.net>
	<45A08269.4050504@zytor.com> <45A083F2.5000000@zytor.com>
From: Krzysztof Halasa <khc@pm.waw.pl>
Date: Sun, 07 Jan 2007 16:06:50 +0100
In-Reply-To: <45A083F2.5000000@zytor.com> (H. Peter Anvin's message of "Sat, 06 Jan 2007 21:24:02 -0800")
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"H. Peter Anvin" <hpa@zytor.com> writes:

> During extremely high load, it appears that what slows kernel.org down
> more than anything else is the time that each individual getdents()
> call takes.  When I've looked this I've observed times from 200 ms to
> almost 2 seconds!  Since an unpacked *OR* unpruned git tree adds 256
> directories to a cleanly packed tree, you can do the math yourself.

Hmm... Perhaps it should be possible to push git updates as a pack
file only? I mean, the pack file would stay packed = never individual
files and never 256 directories?

People aren't doing commit/etc. activity there, right?
-- 
Krzysztof Halasa
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