a core is one instance of an execution unit within a multicore processor. each core has its own private cache, which allows it to carry out tasks independently without having to access main memory as often; how
A thread serves a similar purpose in an OS. There, a thread represents a single sequential order of activities being executed in a process, also known as the thread of execution or thread of control. The OS typically deals with two common types of threads: User-level threads, which are ty...
After disabling one or several virtual CPUs on a Hyper-Threading system with echo 0 >/sys/devices/system/cpu/cpuX/online command, lscpu tool output shows wrong Thread(s) per core field value, telling that Hyper-Threading is disabled now....
Improved intra-processor links for on-the-fly adjustments to core/thread utilization Overclocking capabilities that can unleash additional processor cycles for specific needs Understanding Ryzen terminology When considering a Ryzen processor or Ryzen-equipped PC, there are several AMD feature names and ...
The metric we call CPU utilization is really "non-idle time": the time the CPU was not running the idle thread. Your operating system kernel (whatever it is) usually tracks this during context switch. If a non-idle thread begins running, then stops 100 milliseconds later, the kernel consid...
Core:The core of a CPU is akin to an individual processor. Modern CPUs often feature multiple cores, enabling them to handle various tasks simultaneously, increasing efficiency and speed. Thread:Threads are the smallest unit of processing that can be performed by a CPU. They allow for multitaski...
Typically, the ALU has direct access to the processor controller, main memory --RAMin a PC -- and the input/output (I/O) of the CPU. I/O flows along an electronic path called abus. The input consists of an instruction word, sometimes called amachine instruction word, that contains an ...
Figure 1. Microprocessor performance trend data demonstrating plateau in single-thread performance and frequency (Source:Karl Rupp, Microprocessor Trend Data, 2022,CC BY 4.0). Around the same time frame, public cloud entered the market and hardware-assisted virtualisation technologies appeared in off-th...
Issue After updating to kernel-3.10.0-862.11.6.el7.x86_64 xen guest is not booting. Raw [ 0.031779] FEATURE SPEC_CTRL Not Present [ 0.031780] FEATURE IBPB_SUPPORT Not Present [ 0.031782] CPU: Physical Processor ID: 0 [ 0.031783] CPU: Processor Core ID: 0 [ 0.032573] mce: CPU support...
With huge OS pages, it may be beneficial to set the setting MIMALLOC_EAGER_COMMIT_DELAY=N (N is 1 by default) to delay the initial N segments (of 4MiB) of a thread to not allocate in the huge OS pages; this prevents threads that are short lived and allocate just a little to take...