Public bug reported: ---Problem Description--- Recent performance evaluation has shown significant degradation in the TLS connections per second rate using the OpenSSL s_time benchmark with Ubuntu 18.04.1. While doing RSA sign/verify operations, the engine would preffer doing RSA-ME instead of RSA-CRT which is significantly better in terms of performance.
Baseline for this comparison are measurements executed with another distro. Both measurements have been made on LPAR native, using the CEX6A adapter. Crypto stack on the host: OpenSSL ver: 1.1.0g IBMCA ver: 1.4.1.-0 Libica ver: 3.2.1 Problem present under following condititions: 1. IBMCA ver >= 2.0.0 2. OpenSSL version >= 1.1.0 && IBMCA ver >= 1.3.1. ---uname output--- Linux m42lp01 4.15.0-29-generic #31-Ubuntu SMP Tue Jul 17 15:42:24 UTC 2018 s390x s390x s390x GNU/Linux Machine Type = Type/Model:3906-M04 LPAR ---Steps to Reproduce--- Server; openssl s_server -cert benchcert.pem -quiet -WWW -engine ibmca -accept 8050 Client: openssl s_time -key benchcert.pem -www /2k.html -time 90 -cipher AES256-SHA -new -bugs -connect 10.14.1.254:8050 -elapsed By scaling the number of processes, the issue becomes more and more visible. Userspace tool common name: openssl-ibmca The userspace tool has the following bit modes: 64 Userspace package: openssl-ibmca-1.4.1-0ubuntu1.s390x The attached patch is generated from the commit available here: https://github.com/opencryptoki/openssl-ibmca/commit/a0e23d4063bf897dd9136c491d2201de5fbba653 Generated with: git format-patch -1 a0e23d4063bf897dd9136c491d2201de5fbba653 To be applied with: patch /openssl-ibmca/src/ibmca_rsa.c ~/0001-Fix-doing-rsa-me-altough-rsa-crt-would-be-possible.patch Fix applies smoothly and shows expected performance improvement as visible on the chart. ** Affects: openssl-ibmca (Ubuntu) Importance: Undecided Assignee: Skipper Bug Screeners (skipper-screen-team) Status: New ** Tags: architecture-s39064 bugnameltc-173745 severity-high targetmilestone-inin18043 ** Tags added: architecture-s39064 bugnameltc-173745 severity-high targetmilestone-inin18043 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1806483 Title: Ubuntu 18.04.1 - OpenSSL RSA connection rate performance degradation using ibmca engine (openssl-ibmca) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssl-ibmca/+bug/1806483/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
