Quoting Tvrtko Ursulin (2017-11-24 09:11:06) > > On 23/11/2017 15:03, Chris Wilson wrote: > > We have to be careful in our calibration loop, too slow and we timeout, > > too fast and we don't emit an interrupt! On fast legacy devices, we > > would overflow the calibration calcuation... > > > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> > > --- > > - sz = ALIGN(sz, sizeof(uint32_t)); > > + sz = calibrate_nop(gem_fd, 1e6 / target); > > + gem_quiescent_gpu(gem_fd); > > + > > + fd = open_pmu(I915_PMU_INTERRUPTS); > > + spin = igt_spin_batch_new(gem_fd, 0, 0, 0); > > What's the spin batch for? It's just a plug to ensure that the queue of calibrated execs don't start executing before we're waiting on them. Instead of doing exec + sync, we want to switch to exec[N] + sync. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
