search for: latienc

...instruction scheduling, and so prefetch adding cannot really complete until just before MC generation (the prefetch instructions can be scheduled, but their constant offset needs to be held free for a while). In addition, estimating the number of cycles also requires relatively accurate load/store latiencies, and this, in turn, requires cache-miss latencies to be accounted for (which must then account for the prefetches). If anyone has thoughts on these ideas, I would like to hear them. Thanks again, Hal -- Hal Finkel Postdoctoral Appointee Leadership Computing Facility Argonne National Laborato...

...ing, and so prefetch adding cannot really complete until just > before MC generation (the prefetch instructions can be scheduled, but > their constant offset needs to be held free for a while). In addition, > estimating the number of cycles also requires relatively accurate > load/store latiencies, and this, in turn, requires cache-miss latencies > to be accounted for (which must then account for the prefetches). > > If anyone has thoughts on these ideas, I would like to hear them. If you annotate loads with their expected latency, the upcoming MachineScheduler will be able to...

...adding cannot really complete until just > > before MC generation (the prefetch instructions can be scheduled, > > but their constant offset needs to be held free for a while). In > > addition, estimating the number of cycles also requires relatively > > accurate load/store latiencies, and this, in turn, requires > > cache-miss latencies to be accounted for (which must then account > > for the prefetches). > > > > If anyone has thoughts on these ideas, I would like to hear them. > > Andy, Thank you for writing such a detailed response. >...