"I would think not. The MP effect usually guarantees that 1 2-processor system is significantly less than 2 1-processor systems. The amount of lost capacity has decreased over the years, but it is still non-zero."
2 processors, running at capacity, would be about 1.8x of 1 processor. However, few people run at capacity. Even at low loads, there is an advantge to SMP because Linux is multi-threaded and I/O is asynchronous. SMP would should even help striped LVM. Even compiles can be speeded up if you can use the -j option (-j n+1, where n is the number of available processors > 1. The n+1 allows cpu and I/O overlap). The more concurrent activity, the better off you are with SMP, even with the "loss" due to spin locking. ===== Jim Sibley RHCT, Implementor of Linux on zSeries "Computer are useless.They can only give answers." Pablo Picasso __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html
