MicroQuill Software Publishing

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"SmartHeap for SMP multiplied our application server throughput by a factor of six on quad-processor boxes." -Yaron Goldberg, Click Software The problem: Compiler runtime libraries allow only one thread at a time to be active in the heap. So on SMP systems, when multiple threads make concurrent heap requests, all but one will be blocked by the heap manager, nullifying the benefit of the extra CPUs. Worse yet, each time a thread is blocked, the OS invokes a context switch. The result: adding processors results in a vicious cycle of context switching that can prevent your app from scaling.

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