Re:Intel: 10nm Product Era Has Begun, 7nm on Track
by paulmd on Tuesday October 29, 2019 @12:36PM
(#21389090)
Cascade Lake-X has a new set of hardware mitigations for side-channel attacks (including some which are not hardware-mitigated on AMD architectures, specifically Spectre v2 - AMD claims they are "difficult to exploit" but still enables software mitigations).
Regardless, Firestrike Physics is not a benchmark that is substantially affected by mitigations. End-user tasks in general are not affected very strongly, generally ~1-3%, up to 5% in some cases.
Phoronix tested across a spectrum of workstation tasks (not gaming) and found a geomean of about 12% performance impact for Intel and 4.5% for AMD. Linked earlier, here again:
Generally, server tasks are hit hardest because they involve lots of context switching. Gaming is typically not affected much at all. Workstation tasks fall somewhere in the middle.
Regardless, Firestrike Physics is not a benchmark that is substantially affected by mitigations. End-user tasks in general are not affected very strongly, generally ~1-3%, up to 5% in some cases.
Phoronix tested across a spectrum of workstation tasks (not gaming) and found a geomean of about 12% performance impact for Intel and 4.5% for AMD. Linked earlier, here again:
https://www.phoronix.com/scan.php?page=article&item=3900x-99...
Generally, server tasks are hit hardest because they involve lots of context switching. Gaming is typically not affected much at all. Workstation tasks fall somewhere in the middle.