> -----Original Message----- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > Behalf Of James Melin > Sent: Thursday, April 26, 2007 10:20 AM > To: [email protected] > Subject: Re: Crypto CPACF enablement > > > I was just asked a question that I'm not sure how to > answer..... But here it is. > > If java .jar files are really zip/archive files, and opening > them requires some sort of unzip action which is > theoretically a decryption process, > would a z/series crypto card speed this sort of thing up for > WebSphere running on Linux for z/Series if such a card were > configured? That made me also > wonder... would this also help such things as clam AV > scanning of archive files and zip files? > > I don't know enough about the crypto facility to even hazard a guess. > > Thanks > > -J
CPACF simply adds a number of instructions to the System z's instruction set. It does not speed up anything unless the software issues these instructions. So the question now becomes: Does the ???? program use these instructions? The most likely answer is: "No.". I doubt that the GCC compiler generates any of the CPACF instructions. Note that the CPACF added instructions are not a co-processor. They are simply "normal" instructions which are millicoded in the processor. They execute synchronously using the normal CP hardware. If you truly have one of the "coprocessor" cards, then the question again becomes: "Does the ??? software use this interface?" If it does, it is likely via an assembler level "lib*" module, and not "in line" instructions. IOW - I can't answer your question definitively, but I doubt it. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
