Questions tagged [performance]
The speed at which a program runs
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Horrible performance when downloading from CIFS mounted drive
I have recently wanted to mount a remote CIFS drive. But i have run into one major issue. The speeds are amazing. Uploading is about 220Mbit/s.. However, downloading has speeds of 5Mbit/s.. Which is ...
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High CPU Usage and lag in LinuxMint: performance Issues and Solutions
I open some programs (maybe limited to games, or maybe the problem lies deeper) on my Linux Mint, and when I check their status using the top command in the terminal, I see that they completely use 3 ...
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Simulate slow disks in KVM to see effect of LVM cache in test setup
I'm setting up a Linux system in KVM (QEMU) to test the effect of adding a writeback LVM cache on a fast disk in front of a logical volume that resides on a set of very slow disks (a RAID1 LV). This ...
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Why only LLC miss ratio increase?
On my server, I have a latency critical (LC) task running on NUMA0. To increase utilization, I have also deployed some best-effort (BE) tasks on the same NUMA0. Furthermore, I have enabled some ...
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Why I see different cpu-migrations from top and perf stat?
New to system performance analyze.
I am curious on how CPU affinity affect kvm virtual machine.
So I try to bind vm's vcpu to physical cpu to improve vm's performance.
find the pid of the vm(ecs-...
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CPU running well under maximum frequency
I use my computer for very CPU intense simulations, but no matter what I do the actual CPU frequency wont ever come close to hardware capacity.
I have an i9-13900K, which maximum CPU freq. is 5.8GHz. ...
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Intel turbo boost all core clock speed in practice
My understanding is that Intel's quoted "max turbo boost" speed is only guaranteed when a single core is active, and that when all cores are active, the clock speed could conceivably fall to ...
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How to diff two files in bash efficiently?
I have two files containing the similar pattern:
cmd1 [cmd2 {xx/xx[7] x/x[0] ...}] cmd3 [cmd4 {xx/x[12] ...}]
cmd5 [cmd6 {x/x[1] xx ...}]
I don't need to consider all the cmds in two files. Only need ...
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How to improve performance of unicast to broadcast UDP packet transformation on OpenWrt?
Background
We have some devices sending unicast UDP packets which we want to receive on multiple computers by transforming those packets to broadcast. We can't make any changes to the devices sending ...
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why is all this swap space being used?
I have a Debian box, where I am doing some data recovery using ddrescue on a sata ssd. The process has been running for 24 hours, and has 24 to go (at least)
in any event, the PC has 16GB ram, and ...
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Is there a way to make window either spawning or changing from tiled to floating take the earlier size and place?
I know that I can tell bspwm to spawn windows in specified desktop or monitor in tiled mode or in certain shape and position via floating mode. But I am looking for the window to remember its previous ...
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How do I compare performance of two linux kernel images running on QEMU?
I have built a tracing utility for the Linux Kernel and am testing the same on QEMU. I want to compare the performance of the kernel with and without the tracer. How do I go about doing this?
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Remove subdomains or existing domains
I have a list of domains, a sample is:
account.google.com
drive.google.com
google.com
bgoogle.com
yahoo.co.uk
stats.wikipedia.org
media.wikipedia.org
files.media.wikipedia.org
bible.com
I would like ...
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ZFS dataset encryption on top of LUKS
There has been discussions about using ZFS on top of a LUKS-encrypted partition vs. using ZFS's native per-dataset encryption. However, they are always presented as either-or.
My question is about ...
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Monitorix disable subgraphs
I have a Monitorix service running on my system. By changing y/n values in the graph_enable section I can enable and disable certain graphs, however, there are subgraphs for almost every main graph e....
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