1
vote
1answer
70 views

How to activate NUMA in HP Proliant DL580 G5 Server?

Currently I am working on a task regarding one server with NUMA. The OS running on the server is Ubuntu 14.04.1 LTS. The server has 4 nodes of 16 cpus: Intel(R) Xeon(R) CPU X7350 @ 2.93GHz, i.e. each ...
2
votes
1answer
52 views

Set default numa policy to “interleave” system wide

I know it is possible to set the numa mode to "interleave" (see NB below) for a specific process using numactrl --interleave, but I'd like to know if it is possible to make this the system wide ...
1
vote
1answer
98 views

Linux interrupt affinity

We have a HP DL980 running SuSE Linux Enterprise Server 11 sp2. The machine hosts a PCIe digital IO card which is used to send a clock signal to sychronise with other machines. If we do a top, one ...
7
votes
1answer
5k views

Is there still a use for irqbalance on modern hardware?

This question has been asked before, but I believe that the world has changed enough for it to be asked again. Does irqbalance have any use on today’s systems where we have NUMA-capable CPUs with ...
5
votes
1answer
594 views

numa and taskset

I am trying to use taskset to assign some processes to specific CPU's. When I run taskset, it appears that the command has worked as I get a reply stating what the new affinity of the process is set. ...
1
vote
1answer
448 views

Linux Opteron system appears to be UMA but should be NUMA

According to numactl, this dual CPU Opteron box is UMA rather than the expected NUMA: $ numactl --hardware available: 1 nodes (0) node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 node 0 size: 65534 ...
1
vote
1answer
854 views

What does `numactl --localalloc` do?

What does numactl --localalloc do? Does it bind program allocation to only the single node that numactl --localalloc was run on? Or does it ensure that whenever the program allocates it's given memory ...
2
votes
2answers
1k views

How to configure Linux for using only one CPU/core of a NUMA system

I'm currently working with an AMD Opteron-based NUMA system. For the needs of my current project, I'd like to make Linux and all of the system processes to utilize only the CPU0 (and preferably, only ...