Hyperthreading in P4
SGaudet at turbotekcomputer.com
Mon Apr 29 14:33:18 EDT 2002
> I am also using a dual Xeon 2.2 Ghz box and it seems
> that the box is slower than my normal pentium 3 also.
> The reason i guess is the kernel. If i watch my
> /proc/interrupts i see all of them on the single CPU .
> Upon research on the net i found that it required some
> kind of IRQ routing patch , (ingo's i guess) so that
> the CPU's perform better.
> I havent had much exposure to writing Open MP programs
> and then testing the power of the Xeon.
Key issues are:
1. Code must be threaded.
2. BIOS and O.S. must be enabled.
- RH has a patch available on their site.
As for the performance vs PIII, I strongly recommend that application
developers use our C and Fortran compilers for Linux. GCC is not
well-optimized for Netburst architecture, PGI is o.k., and our compilers
really fly! In addition, our compilers generate the best code for PIII,
AMD, and P4P/Xeon based systems so you really can't lose.
Pls see the following Hyper-Threading whitepaper (preliminary) for all the
gory details about req'ts.>
Linux Solutions Engineer
| Turbotek Computer Corp. tel:603-666-3062 ext. 21 |
| 8025 South Willow St. fax:603-666-4519 |
| Building 2, Unit 105 toll free:800-573-5393 |
| Manchester, NH 03103 e-mail:sgaudet at turbotekcomputer.com |
| web: http://www.turbotekcomputer.com |
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