What is rPerf value?
What is rPerf value?
rPerf is a computer benchmark that evaluates the relative OLTP performance of servers based on IBM Power microprocessors. It is published by IBM and derived from a model based on specific workloads, plus benchmarks from Transaction Processing Performance Council and SPEC.
What is SMT8?
Core. The POWER9 core comes in two variants, a four-way multithreaded one called SMT4 and an eight-way one called SMT8. The SMT4- and SMT8-cores are similar, in that they consist of a number of so-called slices fed by common schedulers.
What power8 I O adapters are supported on POWER9 scale out servers?
POWER9 scale-out and scale-up family servers also support the following existing I/O: PCIe3 3D Graphics Adapter x16 (#EC51) for Power L922, S922, and H922 servers. PCIe3 2-Port 40 GbE NIC RoCE QSFP+ Adapter (#EC3B) for Power E980 and E950 servers.
What is a power server?
IBM® Power Systems™ Virtual Server is a Power Systems offering. The Power Systems Virtual Servers are located in the IBM data centers, distinct from the IBM Cloud servers with separate networks and direct-attached storage.
What is SMT AIX?
This command controls the simultaneous multithreading options. Each individual Simultaneous Multi-threading (SMT) thread of a physical processor core is treated as an independent logical processor by AIX®.
What voltage options are available for the scale out servers?
Power plug requirements are still the same as POWER8 scale-out servers (C13/C14) and all the systems require 220V power with the exception that the S914 (tower only) can run on 110V. For all three servers, all cores and memory must be active.
Can you run a server PSU at 100%?
Quality PSU’s should run just fine at full load for their rated lifetime. Of course, if you’re running at full load the efficiency difference might be worth thinking about, too. continuum wrote: Of course, if you’re running at full load the efficiency difference might be worth thinking about, too.
Is Power Systems a mainframe?
Later in this article we will discuss about IBM Power Systems. Some people may think are Mainframes, but they are not, they are an inspired mid range enterprise machines/servers.
What’s the difference between hyperthreading and multithreading?
Multithreading is a term for parallel processing on the operating system level. The processor has nothing to do with multithreading. Hyperthreading is an Intel concept that implements “simultaneous” processing of multiple threads in a single processor core.
Does SMT increase FPS?
In multi-threaded workloads, we saw an average uplift in performance of +22% when SMT was enabled. Most of our tests scored a +5% to a +35% gain in performance. A couple of workloads scored worse, mostly due to resource contention having so many threads in play – the limit here is memory bandwidth per thread.
What is rPerf and how is it used?
POWER Relative Performance (rPerf) is often used as a way to approximate the expected difference in performance between two Power Systems servers.
What is the POWER7+ processor?
The first boxes to ship with the POWER7+ processors were IBM Power 770 and 780 servers. The chips have up to 80 MB of L3 cache (10 MB/core), improved clock speeds (up to 4.4 GHz) and 20 LPARs per core.
What is the difference between IBM Power 6 and power 7?
While the POWER6 features a dual-core processor, each capable of two-way simultaneous multithreading (SMT), the IBM POWER 7 processor has up to eight cores, and four threads per core, for a total capacity of 32 simultaneous threads.
How many cores are in a POWER7 microchip?
The POWER7 is available with 4, 6, or 8 physical cores per microchip, in a 1 to 32-way design, with up to 1024 SMTs and a slightly different microarchitecture and interfaces for supporting extended/Sub-Specifications in reference to the Power ISA and/or different system architectures.