David UniVerse does not use multicore at all - indeed it does not use anything that relates to the hardware. It uses the standard APIs available in the Operating System, efficient use of the hardware platform is solely down to the Operating System.
Worth being very specific with the core usage - an 8 core system can be running one thread on one core at 100% - and overall be rated at 12.5% occupied (1 x maxed out and 7 idle). You need to run a number of concurrent processes with CPU contention to get a true measure. Also a caution: sometimes CPU chips are optimised for single-process/multi-threaded code. I have seen this on some CPU chips (who shall remain nameless). The CPU chip however sacrificed cache to make room for the multi-threaded logic. If you ran a single-threaded set of code (and each UniVerse process in memory is single-threaded) then the CPUs ran slower than the earlier models, Benchmarking is both an art and a science in equal mix. Examine the CPU loading when there are multiple processes running with CPU contention - load the system up with CPU intensive activity. It's only then that you will get some real feel for what the CPUs can do for you. CAUTION: There are lots of other "sinks" for system power - that's why I suggested pure CPU logic for the test. You could be losing bandwidth elsewhere (SANs are a favourite - especially if optimised for Sequential access with a large read-ahead cache or if you have a remote backup SAN with a remote Commit on writes needed before completion). Regards JayJay -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ALLEN, David Sent: 11 August 2008 17:12 To: [email protected] Subject: [U2] Sun Hi, Has anyone any experience of running universe on the Sun coolthread range of servers, i.e. T1000, T2000, T5120 etc? We have just installed uv 10.2.2 on a new T5120 with a 4 core eight thread processor and 4 Gig of RAM, and I am in the process of compiling our suite of application programmes. The performance, i.e the time taken to compile, is very slow, much slower than the 5 year old V250 the T5120 is to replace! However, "top" suggests the machine is barely ticking over with the Processor at 96.7% idle and 0.0% iowait during the compile. Any help or suggestions would be welcome. My concern is that universe is not using the multicore technology efficiently. Thanks in advance. David CONFIDENTIALITY NOTICE The information contained in this e-mail is intended only for the confidential use of the above named recipient. If you are not the intended recipient or person responsible for delivering it to the intended recipient, you have received this communication in error and must not distribute or copy it. Please accept the sender's apologies, notify the sender immediately by return e-mail and delete this communication. Thank you. ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/
