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Questions tagged [numa]

The tag has no usage guidance.

1
vote
0answers
30 views

What prevents page migration?

OpenSUSE 42.3, Kernel 4.4.175-89-default Running memory bandwidth intensive applications I realised the following behaviour: The application uses ~55% of the physical memory of a NUMA system with 2 ...
2
votes
0answers
14 views

Allocate pools of hugepages separately on each NUMA doamin

On my dual-socket machine, I'm trying to allocated two pools of hugepages (one for each socket), so that the application A, which is pinned on the first socket, uses the first pool, and the ...
2
votes
1answer
24 views

Where does the default numa setting come from?

when we run: numactl --hardware we can see the current status of numa setting. However, it seems not set by Linux ( at least, I didn't add a parameter to set it ). Did it set by BIOS?
1
vote
1answer
2k views

Sub-process returned an error code when apt-get install package

sudo apt-get install numactl E: Problem executing scripts APT::Update::Post-Invoke-Success '/usr/bin/test -e /usr/share/dbus-1/system-services/org.freedesktop.PackageKit.service && /usr/bin/...
1
vote
1answer
37 views

Find out where the allocated memory for a process resides

I would like to investigate where the memory for a specific process is allocated. To be more specific: I am running an OpenMP parallel Fortran binary on a ccNUMA machine with two physical CPUs. My ...
6
votes
2answers
3k views

How to disable one CPU

I'm trying to disable some CPUs of my server. I've found this link: https://www.cyberciti.biz/faq/debian-rhel-centos-redhat-suse-hotplug-cpu/linux-turn-on-off-cpu-core-commands/, which offers me a ...
4
votes
1answer
811 views

Globally setting CPU affinity

Is there a way to make all processes, except the ones I intentionally set otherwise with taskset or numactl use only certain cores/memory (without looping through every thread of every process and ...
10
votes
1answer
860 views

How to migrate all the memory pages of a process from one NUMA node to another NUMA node?

In Linux, I want to migrate the memory pages of a KVM virtual machine from one NUMA node to another NUMA node on runtime. But I cannot find any interfaces to do that in the KVM hypervisor or using the ...
3
votes
1answer
5k views

How do I run a service with numactl

I need to do something like this to run MongoDB $numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf & What should I change to be able to run the mongo daemon with the options ...
3
votes
0answers
497 views

Using shared memory through tmpfs and NUMA on x86_64/Linux

Here's what I'd like to do: put a file on tmpfs but ensure that all of it (all pages of it) ends up on the same NUMA node. First, I thought this would be trivial: I'd just mmap() a tmpfs file with ...
0
votes
1answer
1k views

How to check if NUMA is enabled on my Solaris machine, and then enable it if not?

How to check if NUMA is enabled on my Solaris machine, and then enable it if not? I have Solaris 11 11/11 SPARC I tried sudo find /proc|grep -i numa but it prints nothing
1
vote
1answer
336 views

32 bit OS memory limitation on NUMA systems

Running 32 bit Rhel 6.5 with kernel 2.6.32-431.el6.i686 on a server with 46 Gb RAM and NUMA support. CONFIG_X86_PAE=y Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz OS is not able to see more than 14GB ...