Path: utzoo!mnetor!uunet!mcvax!enea!tut!jarmo From: jarmo@tut.FI (Jarmo Sorvari) Newsgroups: comp.sys.hp Subject: Re: HP825 math 15x SLOWER than 825 Message-ID: <129@karhu.tut.FI> Date: 31 Mar 88 11:27:20 GMT References: <830004@bgphp1.UUCP> Reply-To: jarmo@karhu.UUCP (Jarmo Sorvari) Organization: Tampere University of Technology, Finland Lines: 95 In article <830004@bgphp1.UUCP> rclark@bgphp1.UUCP (Roger N. Clark) writes: >I have benchmarked the HP9000 series 825 using number crunching >programs and find: > The 825 is 5 to 7 times SLOWER than a single cpu 500!!!!! > In a multitasking environment the 825 can be at least > 15 TIMES SLOWER > ^^^^^^^^^^^^^^^ > than a 3 cpu 500!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! >Below are the results of a simple "wierd box filter" program. This >program shows a typical response in our shop. It does both array >indexing and computation on elements in the arrays. The compiled >program is only about 350KBytes in size and it does not page to >disk. > > A Multitasking, CPU intensive Benchmark > > Real Time >----------------------------------------------------------------------- > Number of Tasks >System 1 2 3 4 5 7 10 12 >----------------------------------------------------------------------- >HP9000/500 3 CPUs 5.9 6.0 6.3 8.4 10.5 14.7 21.5 27.8 >HP900/825 HPUX1.2 29.1 58.1 87.2 116.3 145.6 205.0 291.5 350.1 >----------------------------------------------------------------------- > CPU Time >----------------------------------------------------------------------- > Number of Tasks >System 1 2 3 4 5 7 10 12 >----------------------------------------------------------------------- >HP9000/500 3 CPUs 5.8 11.8 18.4 24.4 30.7 43.0 62.2 81.4 >HP900/825 HPUX1.2 29.0 57.9 87.0 116.0 144.7 202.7 288.5 346.5 >----------------------------------------------------------------------- I tried your benchmark also, and got results that look like they should look like, at least to my mind. The 9000/840 is the first RISC model they produced (for HP-UX), implemented in TTL technology, has 4.5 MIPS, while the 825 is an NMOS machine and 7 MIPS (if my memory serves me right). A Multitasking, CPU intensive Benchmark Real Time ----------------------------------------------------------------------- Number of Tasks System 1 2 3 4 5 7 10 12 ----------------------------------------------------------------------- HP9000/500 3 CPUs 5.9 6.0 6.3 8.4 10.5 14.7 21.5 27.8 HP9000/825 HPUX1.2 29.1 58.1 87.2 116.3 145.6 205.0 291.5 350.1 HP9000/840 HPUX1.2- 3.0 7.8 9.9 11.6 14.3 20.2 28.9 37.4 HP9000/840 HPUX1.2+ 2.1 3.9 5.8 7.8 10.9 16.2 26.0 32.3 "-": no optimization for the FORTRAN compilation, "+": full optimization ----------------------------------------------------------------------- CPU Time ----------------------------------------------------------------------- Number of Tasks System 1 2 3 4 5 7 10 12 ----------------------------------------------------------------------- HP9000/500 3 CPUs 5.8 11.8 18.4 24.4 30.7 43.0 62.2 81.4 HP9000/825 HPUX1.2 29.0 57.9 87.0 116.0 144.7 202.7 288.5 346.5 HP9000/840 HPUX1.2- 2.8 5.8 8.6 11.3 14.5 20.7 29.0 35.3 HP9000/840 HPUX1.2+ 2.0 3.9 5.9 8.0 9.8 13.6 19.6 24.6 "-": no optimization for the FORTRAN compilation, "+": full optimization ----------------------------------------------------------------------- NOTES: HP9000/500: 6.5 MBytes main memory, 3 floating point CPUs, 65MByte system, 55MByte /tmp disk, 132MByte user disk, 571MByte data disk (Used by virtual memory), HP-UX 5.21. HP9000 series 825 (HP Precision Architecture, RISC machine) 16 MBytes of main memory, single 404MByte disk drive. HP Demo, 3/23/88. HP-UX 1.2 (Also tried it on HP-UX 2.0 pre-release with slightly worse results). HP9000 series 840 (HP Precision Architecture, RISC machine, TTL technology). 8 Mb of main memory, single 570 Mb disk drive. HP-UX 1.2. Tests run with a very small load, five users logged in (using a Bridge terminal server, and ARPA/Berkeley running in the 840). HP gives the machine the nominal performance index 4.5 MIPS, as opposed to the 7 MIPS for the 825. ----------------------------------------------------------------------- >Is the 825 really that bad? Could there be a problem with the 825 >I tested. I suspect there were. -- ----------------------------------------------------------------------------- ! Jarmo Sorvari Control Engineering Laboratory ! ! ...!mcvax!tut.fi!jarmo Tampere University of Technology ! --------------------------------------- BOX 527, 33101 Tampere, Finland -----