RE: improving ssh2 performance on SPARCv8/SPARCv9 systems
Going back to this thread;
After upgrading to Woody and making the necessary recompiles I noticed a
good speed increase - thanks. How do I stop apt-get upgrade attempting
to re-install the old unoptimised version though?
I did the following:
apt-get update
apt-get source openssl
Which downloaded 0.9.6c-2 which is the current release. I then rebuilt
it using 'dpkg-buildpackage -rfakeroot -uc -b' and installed the
resulting packages.
If I try an 'apt-get upgrade' on the box it will download the openssl
sources and re-install them although it downloads exactly the same
version again without the optimisations. At present I am doing the
following:
apt-get update
apt-get upgrade
Then re-install the old packages which I rebuilt with optimisations.
TIA,
Chris
-----Original Message-----
From: Ryan Kirkpatrick [mailto:debian@rkirkpat.net]
Sent: 28 March 2002 14:24
To: debian-sparc@lists.debian.org
Subject: Re: improving ssh2 performance on SPARCv8/SPARCv9 systems
On Tue, 26 Mar 2002, Raoul Borenius wrote:
> On Tue, Mar 19, 2002 at 04:46:07AM -0800, Joshua Uziel wrote:
> > Just a quick guess that it looks like a factor of 7 or 8 in speed
> > improvement. So, how can you get this wonderful benefit on your
> > machine, you ask? You can either build it yourself:
> >
> > 1) apt-get source openssl0.9.6
> > 2) edit openssl-0.9.6c/Configure ... search down to "debian-sparc"
and
> > add in a "-mv8" right after the "gcc:"
> > 3) debuild
>
> I think you also need to include the supplied object-file for sparcv8
> (like in the default line for linux-sparcv8).
>
> "debian-sparc","gcc:-mv8 -DB_ENDIAN -DTERMIO -O3 -fomit-frame-pointer
> -Wall -DBN_DIV2W::-D_REENTRANT:-ldl:BN_LLONG RC4_CHAR DES_UNROLL
> BF_PTR:asm/sparcv8.o:::::::::dlfcn:linux-shared:-fPIC",
>
> Without the '-DBN_DIV2W' and 'asm/sparcv8.o' the library was as slow
> as before on my box.
In case any one is interested, this tweak also helps ssh1
performance on Sparcs running Potato. The build line is slightly
different for the libssl version found in potato (libssl-0.9.4-5), here
is the modified version:
"debian-sparc","\$(TOP)/debian/libtool gcc:-mv8 -DB_ENDIAN -DTERMIO -O3
\ -fomit-frame-pointer -Wall -DBN_DIV2W::(unknown)::BN_LLONG RC4_CHAR \
DES_UNROLL BF_PTR:asm/sparcv8.o::",
After rebuilding, installing, and restarting sshd, there is a
noticable improvment, at least in initial login latency. My Sparc 20
used to take a noticable amount of time to login to, but now it is
nearly as fast as my Alpha XL366 to login to. :) On my Sparc 5, I have
real numbers, before the tweaked libssl, logins took ~2.9 seconds, while
with the tweaked libssl, logins now only take ~1.4 seconds!
Thanks for the tweak! TTYL.
------------------------------------------------------------------------
---
| "For to me to live is Christ, and to die is gain."
|
| --- Philippians 1:21 (KJV)
|
------------------------------------------------------------------------
---
| Ryan Kirkpatrick | Boulder, Colorado | http://www.rkirkpat.net/
|
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