Difficult to say, Sergey Most z9 boxes running z/OS, z/VM an Linux get away with the standard 2 SAPs / MCM, so the percentage is probably lower than 20% on average. Heavy IO OSs such as TPF often uses more SAPs. So I would guess it is much higher than 1 or 2 %, but probably not more than 20 % of each processor. I have no experience with FC channels, but I assume that an IO is still the same there. The SAN as such does not reduce what the host needs to do. Regards
________________________________ From: Linux on 390 Port on behalf of Sergey Korzhevsky Sent: Thu 2007-02-01 15:15 To: [email protected] Subject: Re: 1 480 MIP IFL CPU = ? Hi Bertus. Can we tell that "most of the IO" is a significant part of overall cpu power? You know, if it took 1-2% of the CPU, it wouldn't be so much. Also, is your statement right if we compare Linux/390 with zfcp and the corresponding intel server with SAN, for example. I'm asking this as i want to clear this topic for myself. Thank you. WBR, Sergey Bertus Bekker - BCX - Persetel Q Vector <[EMAIL PROTECTED]> Sent by: Linux on 390 Port <[email protected]> 01.02.2007 14:51 Please respond to Linux on 390 Port To: [email protected] cc: Subject: Re: 1 480 MIP IFL CPU = ? Not quite, Sergey In the play computer world, the CPU drives most of the IO - on z, most IO functions are offloaded to the SAP. SCSI controller can better be compared to a z control unit. Regards ________________________________ From: Linux on 390 Port on behalf of Sergey Korzhevsky Sent: Thu 2007-02-01 14:50 To: [email protected] Subject: Re: 1 480 MIP IFL CPU = ? Hi Robert. Don't you think, that, for example, SCSI controller plays the same role in Intel world? Thank you. WBR, Sergey RPN01 <[EMAIL PROTECTED]> Sent by: Linux on 390 Port <[email protected]> 31.01.2007 16:59 Please respond to Linux on 390 Port To: [email protected] cc: Subject: Re: 1 480 MIP IFL CPU = ? It also doesn't account for the fact that the Intel processor is doing its own I/O, where that is almost completely off-loaded on the z9 to other processors. In all, it really is an apples to oranges comparison, and whatever conclusion you¹re looking for can be achieved. -- .~. Robert P. Nix Mayo Foundation /V\ RO-OC-1-13 200 First Street SW / ( ) \ 507-284-0844 Rochester, MN 55905 ^^-^^ ----- "In theory, theory and practice are the same, but in practice, theory and practice are different." > From: Dave Jones <[EMAIL PROTECTED]> > > Well, according to this article " Design methods for attaining IBM > System z9 processor cycle-time goals" > (http://www.research.ibm.com/journal/rd/511/mayer.html), the cycle time > of the new z9 processor chip is 1.7 GHz. So, based on these numbers > alone, a 2GHz. Pentium would outperform a z9 processor chip by a factor > of: 2.0/1.7 = 1.1765.....;-) > > Of course, this isn't very useful since we do not take into account the > differences in system architecture (RISC v. CISC, etc.) and design > (number of processors, memory access, etc.). But at least you can tell > your management that the processors in your new z9 are as fast as the > processors in their desktop PCs......;-) ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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 Important Notice: This e-mail and its contents are subject to the Business Connexion (Pty) Ltd. E-mail legal notice available at: http://www.bcx.co.za/disclaimer.htm ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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 Important Notice: This e-mail and its contents are subject to the Business Connexion (Pty) Ltd. E-mail legal notice available at: http://www.bcx.co.za/disclaimer.htm ---------------------------------------------------------------------- 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
