cpu

Ok, so I posted in In C# GetEnvironmentVariable("NUMBER_OF_PROCESSORS") returns the wrong number asking about how to get the correct number of cores in C#. Some helpful people directed me to a couple of questions where similar questions were asked but I have already tried those solutions. My question was then closed as being the same as another question, which is true, it is, but the solution given there didn't work. So I'm opening another one hoping that someone may be able to help realising that the other solutions DID NOT work. That question was How to find the Number of CPU Cores via .NET

I have created a benchmark class that allows the user to insert for example $timer->checkpoint('1'); to check out some code for time,memory consumption and such.... and at the end of the code if she/he wants to test it she/he has to insert $result=$timer->result(); this gives out some data to public function result() like e.g. memory usage (using memory_get_peak_usage) and time consumption (microtime()). This all works just fine for me. But how can I use the combination of existing built-in php functions to get a value that can be considered a CPU consumption ? It has been quite easy to

We've just bought a 32-core Opteron machine, and the speedups we get are a little disappointing: beyond about 24 threads we see no speedup at all (actually gets slower overall) and after about 6 threads it becomes significantly sub-linear. Our application is very thread-friendly: our job breaks down into about 170,000 little tasks which can each be executed separately, each taking 5-10 seconds. They all read from the same memory-mapped file of size about 4Gb. They make occasional writes to it, but it might be 10,000 reads to each write - we just write a little bit of data at the end of each of

I am using Intel(R) Core(TM) i5 CPU M 560 @ 2.67GHz as I found out from cat /proc/cpuinfo . But I want to know exact hierarchy like how many sockets are there, and how many cores are there per socket and threads too, if supported. Any idea? you can use command lscpu this will give information for processor related info dmidecode -t processor Sebastian Kuzminsky lstopo from the hwloc package reports the info you want: Socket L#0 + L3 L#0 (6144KB) L2 L#0 (256KB) + L1 L#0 (32KB) + Core L#0 PU L#0 (P#0) PU L#1 (P#1) L2 L#1 (256KB) + L1 L#1 (32KB) + Core L#1 PU L#2 (P#2) PU L#3 (P#3) L2 L#2 (256KB)