Questions tagged [numa]
The numa tag has no usage guidance.
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Number of NUMA nodes and CPU core selection for low latency systems
I use an AMD EPYC 9374F CPU with Ubuntu Server 23.04. My goal is having the lowest possible latency.
I am running 1 hot path thread in a core and 3 threads for other admin works. Depending on the NUMA ...
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Why does the count of NUMA Nodes Influence Processor grouping
On a HPE DL380 G10 Server with 2 Xeon(R) Gold 6246R (32 phys. Cores, 64 log. with HT), in the BIOS, using this setting:
System Configuration > BIOS/Platform Configuration (RBSU) >
Performance ...
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Memory distribution in NUMA nodes does not add up to system memory
I recently started working on systems with NUMA nodes, and noticed something strange.
/proc/meminfo shows the sytem has 128461 MB
[root@nfvis node]# head -n4 /proc/meminfo
MemTotal: 131544388 kB
...
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How to create a NUMA topology in single system environment
I want to know if it possible to create a NUMA topology(2 NUMA nodes is also fine) in a single system environment (I'm using virtualbox ubuntu 18.04).
When I run $numactl -H, I see the following
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How does multi cpu system shares pci-express bus?
For a modern single-cpu system things are transparent: there is multicore cpu, where cores are talking via uncore functions (like L3 cache, shared on-die memory controller). Uncore does also all the ...
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Information About Named Shared Memory in /dev/shm
Let's say I see a file called /dev/shm/some.segment
How can I find out (with command lines):
The processes that are linked to it?
The NUMA node it locates?
For #2, I can write a small C program ...
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Using vmware images with numa suppprt
I want to demonstrate Linux numa system with 2 virtual machine images running linux
What is the best way and the correct distribution to use?
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Running an application across two nodes with Windows Server with NUMA
I had an interesting call with a client today. We have an application which schedules other apps, and normally we have no trouble at all with servers with NUMA configuration with anywhere from 2 to 4 ...
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How can I change the distribution of Cores across NUMA-nodes?
On Ubuntu 14.04 TLS for 36 total cores = (2 x CPUs x 9 Cores x 2 HyperThreading), lscpu give me:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little ...
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Is the amount of NUMA nodes always equal to sockets?
I have used lscpu to check two servers configuration:
[root@localhost ~]# lscpu
Architecture: x86_64
......
Core(s) per socket: 1
Socket(s): 1
NUMA node(s): 1
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Is there a way to run a job exclusively on a chip?
We've got a bunch of large (1TB+) NUMA machines at work and have been getting a lot of noise in benchmarking. We've noticed that run times for our application are very consistent from one run to the ...
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Determine PCIe device NUMA node
Assuming fairly recent Linux OS, is there an easy way to determine to which NUMA node the PCIe slot, where a device is plugged in, belongs?
user49531
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Mapping of memory addresses to physical modules in Windows XP
I plan to run 32-bit Windows XP on a workstation with dual processors, based on Intel's Nehalem microarchitecture, and triple channel RAM. Even though XP is limited to 4 GB of RAM, my understanding is ...
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Cache coherence literature for big (>=16CPU) systems [closed]
What books and articles can you recommend to learn basis of cache coherence problems in big SMP systems (which are NUMA and ccNUMA really) with >=16 cpu sockets?
Something like SGI Altix architecture ...
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Should I use NUMA or SMP with Vista 64-bit?
My Dell Precision T5500 workstation has an option in the BIOS for changing the memory mode between SMP and NUMA.
Which of these options should I use with Vista 64-bit? Does Vista support NUMA?
From ...
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