... no non-sleeping process, it switches to a "dummy" process which tells the cpu to slow down a bit and sits in a loop — the idle loop). If a signal is sent to a sleeping process, it has to be woken up before it will return to user space and thus process the pending signal. Here we have the differe...

...r of threads to enter, this can be used for example to limit the number of cpu, io or ram intensive tasks running at the same time. For a more detailed post about the differences between mutex and semaphore read here. You also have read/write locks that allows either unlimited number of readers or...

...h statement provokes the compiler into sending the value directly into the CPU registers rather than putting it on the stack first. This is therefore in favour of the switch statement and not a balanced test. Oh and I think you should also reset counter between tests. In fact, you probably should b...

...t deciding what to lock. Be aware that taking a lock involves cache-flush CPU operations and is somewhat expensive. In other words: do not lock and update each individual integer. :) – Zan Lynx Oct 31 '08 at 0:12 ...

...ster than they could be closed - server port exhaustion which hammered the CPU to 100%. My fix was to change the HttpClient to a static instance which solved the problem. Yes, it is a disposable resource, but any overhead is vastly outweighed by the difference in performance. I encourage you to do ...

...the code is just a metaphor. Nothing is really "going" anywhere inside the CPU except electrons and photons (for the waste heat). Sometimes we give up a metaphor for another, more useful, one. I recall encountering (a few decades ago!) a language where if (some condition) { action-1 } else { ac...

...bar), where bar is an int and boz() is a function returning int. Assume a CPU where parameters are expected to be passed in registers R0-R1. Function results are returned in R0; functions may trash R1. Evaluating "bar" before "boz()" would require saving a copy of bar somewhere else before callin...

...ou specify otherwise). This means that, if your service is going to do any CPU intensive work or blocking operations (such as MP3 playback or networking), you should create a new thread within the service to do that work. – José Juan Sánchez Nov 15 '14 at 15:...

...ives a null instance of B) and environment bugs (it runs fine on my single-CPU machine, but my colleague's 4 core machine can't pass the tests). The main disadvantage is that integration tests touch more code, are less reliable, failures are harder to diagnose and the tests are harder to maintain. ...

...nd because readers read entries sequentially, this is important to utilize CPU caches. And lots of efforts to avoid lock, CAS, even memory barrier (e.g. use a non-volatile sequence variable if there's only one writer) For developers of readers: Different annotating readers should write to differen...