1. A processor comprising: a plurality of operating system-managed sequencers to each execute a thread; and an acceleration unit to detect when an operating system-managed sequencer of the plurality of operating system-managed sequencers is idle in an operating system; fetch an acceleration thread from an acceleration thread task queue, wherein a thread to benefit from accelerated execution is to place a pending acceleration thread into the acceleration thread task queue; execute the acceleration thread on the operating system-managed sequencer while idle and without intervention of the operating system, wherein the acceleration thread is to execute one or more tasks to accelerate execution of other threads to be executed on other operating system-managed sequencers; and drop execution of the acceleration thread when the operating system-managed sequencer is demanded by the operating system.