On Thu, Apr 20, 2017 at 02:00:58PM +0200, Paolo Bonzini wrote: > I'm not trying too hard yet. Later, with multiqueue support, > this may cause cacheline bouncing.
This patch calls qemu_clock_get_ns() within a spinlock region. It's probably just a memory load, rdtsc, and some math but more heavy-weight code paths are possible too. Taking the clock reading outside the lock region should be fine and reduces the chance of contention.
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