Guys, Just checked the bootup process of our server (DELL PowerEdge 1750) and it uses one processor. The Xeon processor is using HT technology so that's why my /proc/cpuinfo output detected it as processor 0 and 1. But when I used "top" command, the output tells me that HT is disabled, please correct me if I'm wrong with my analysis. ___ top
top - 09:50:11 up 1 day, 16:13, 1 user, load average: 0.66, 0.63, 0.58 Tasks: 162 total, 1 running, 161 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7%us, 0.2%sy, 0.0%ni, 99.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1035348k total, 956120k used, 79228k free, 167356k buffers Swap: 1966072k total, 0k used, 1966072k free, 540536k cached ___ Guys this server is a Proxy/Caching Server (squid) and Content Filtering (dansguardian). We want to maximize the processing capability of this server because currently it is serving a thousand (1000 min - 5000 max) researchers in our institution. Need your advise. Thank you. On 10/5/07, Orlando Andico <[EMAIL PROTECTED]> wrote: > > Well, what the OS thinks is really irrelevant w.r.t. Hyper-Threaded > processors. > > Hyper-Threading only gives 5% performance improvement over a single > thread, on CPU-bound activities. A thread is much, much less than a > core. > > That actually explains why you only see one or two bars with lots of > activity. > > To quote one of my colleagues from Redwood Shores: > > "Yes. Hyperthreading only works if there are lots of L2 cache misses. > Then the CPU can work on the pretend CPU's work while waiting. But if > there were no cache misses then there would be zero benefit to HT. So > the tighter your code is the less HT works. > > HT is basically a fraud. You are seeing exactly what you will with > almost anu software, not just with TimesTen. If you get even 5% > improvement then you did good. No one should expect much more." > > > > > On 10/5/07, Michael Tinsay <[EMAIL PROTECTED]> wrote: > .. > > I have a server that has a dual-core, HT-enabled processor. Ubuntu says > it > > has 4 processors. htop shows 4 bars for processors, but most of the > time > > only one or two have activity. > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > [email protected] (#PLUG @ irc.free.net.ph) > Read the Guidelines: http://linux.org.ph/lists > Searchable Archives: http://archives.free.net.ph >
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