[Bug 940230] Re: openssl on 64bit is much slower than before

[JH]

Here's a post that talks about the old assembly for 64bit x86. 
http://zombe.es/post/4059999783/openssl-outmoded-asm

Performance is up to 50% worse for AES ciphers so I would think this is
a must fix.

Patch available for RC4 on x86_64.
http://cvs.openssl.org/filediff?f=openssl/crypto/rc4/asm/rc4-x86_64.pl&v1=1.12&v2=1.13

For the rest, the option should be to disable ASM for 64bit and rely on AESNI for processors with AES-NI support. 
Possible patch here: http://dl.dropbox.com/u/24257718/openssl-1.0.0d-noasm_aes_rc4.patch


Another data point:
http://old.nabble.com/64-bit-OpenSSL-FIPS-1.2.3-with-asm-slow-performance-problems-on-AES-td32773268.html

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https://bugs.launchpad.net/bugs/940230

Title:
  openssl on 64bit is much slower than before

Status in “openssl” package in Ubuntu:
  New

Bug description:
  Posting output of openssl speed on precise alpha and 10.04. Some quick
  googling seems to indicate issues with 64bit asm vs. the C version
  (might be a good idea to disable 64bit asm). This is on a processor
  without AES-NI (which is still very common).

  Precise:
  type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
  aes-128 cbc      61725.52k    67902.33k    69264.13k   146084.86k   148518.23k
  aes-192 cbc      52222.95k    56592.77k    57542.04k   122330.11k   125277.32k
  aes-256 cbc      44912.70k    48644.01k    49539.94k   105978.88k   107372.74k

  Lucid:
  type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
  aes-128 cbc      74876.87k   118355.41k   138862.76k   144140.50k   141562.78k
  aes-192 cbc      82093.08k   110813.18k   120764.33k   118315.44k   118527.32k
  aes-256 cbc      74760.65k    96842.01k   104520.45k   106615.81k   103481.34k

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: openssl 1.0.0g-1ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2
  Uname: Linux 3.2.0-12-generic x86_64
  ApportVersion: 1.93-0ubuntu2
  Architecture: amd64
  Date: Fri Feb 24 02:33:44 2012
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120201.1)
  ProcEnviron:
   TERM=xterm-256color
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: openssl
  UpgradeStatus: No upgrade log present (probably fresh install)

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