tamz_msc
Diamond Member
- Jan 5, 2017
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Your simulations start out as throughput-oriented but become sensitive to latency once it reaches steady state temperatures as time progresses? Also why should the CPU throttle after steady state - do you turn down cooling or what?Hyperthreading, when it works, works quite well but for a limited time. Then after hours of heavy loads hyperthreading often gets worse and worse (not usually tested in benchmarks that have a very short period in which to rush out the review). In my workstation experiences (where my simulations may run for weeks at a time with the CPU pegged at 100% utilization), hyperthreading just peters out as the chip thermally throttles.
It might do fine for a quick boost here and there. But for actual heavy loads, it isn't quite what people want.
If SMT is so bad for your "heavy workloads", then I wonder why ORNL commissioned Power9 which has up to 8-way SMT.