Questions tagged [load]

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Does Yocto Linux load manage the cores?

Does Yocto Linux load manage the cores on a multiple core CPU? Tried looking for info on forums, etc. Can't find a definite answer. Thanks!
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1answer
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Does the existence of linker and loader not depend on operating systems such as Linux?

Does the existence of linker (for performing linking following compilation) and loader (for executing an executable file) not depend on operating systems such as Linux? (I had though of linker and ...
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Monitor the resource consumption during a system load and send a report to a file

I would like to monitor the resource consumption (cpu, ram, disk) during a system load and send a kind of report to a file during this load, RHEL7 operating system. Can you recommend any way to do ...
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1answer
49 views

** File not found /boot/uImage ** When using Angstrom Pre-built Images on BeagleBoneBlack Rev C

I'm trying to boot my BeagleBone Black into Angstrom using pre-built images found here. My SD card has two partitions BOOT & ROOTFS, and was formatted according to the procedures found here. ...
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CPU Utilization history and what caused high load

I'm trying to find out what caused the cpu to run on 100% for 2 hours on 26th this month. Is there a way to find out what processes caused the high load? All i can find through sar is the cpu ...
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1answer
91 views

High load when Ethernet cable is unplugged

I'm building a system image with v4.19.106 kernel and BusyBox for BeagleBone Black using buildroot 2020.02. If I boot the board from the resulting SD card, I see a strange behaviour: system load stays ...
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2answers
60 views

Unidentified loads on CPU

For a while now, I get unusual activity, which comes in bursts of about 1.5 seconds. I can see the activity on XFCE's CPU graph. The intervals are not constant. Sometimes the peak is just milliseconds,...
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1answer
13 views

How to measure a “temporary load” [duplicate]

As far as I understand, un*x load by definition is an integral measure, averaged over a predefined and quite long time periods. On the other hand, CPU utilisation can be considered a temporary measure:...
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160 views

VAAPI usage monitoring

I have Intel Core-i7 8650U processor. I transcode video with ffmpeg. I take attempts to accelerate it. Now I use VAAPI codecs in ffmpeg (h264_vaapi) and vaapi rescaling (scale_vaapi) in filters. And ...
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0answers
39 views

Two identical application different cpu usages behavior

I have two openstack instance node1 - 16 vCPU / 16GB memory node2 - 8 vCPU / 8GB memory both machine behind F5 load-balancer (round-robin) and running MongoosIM application, but i am noticing ...
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425 views

How to find max queue length for device?

Recently I ran into some I/O overload problrms on some of our machines and I have been searching to find thresholds for some metrics like: avgqu-sz await svctm Then I saw this post on Stack ...
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59 views

How to get CPU “load” of subset of CPU cores?

In my environment, each job is assigned (cpuset) to a subset of CPU cores, almost exclusively. (Actually, it's done by Slurm.) Since the CPU core occupation is exclusive, can I get/calculate the 1-...
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1answer
76 views

How to measure the usage of disk cache?

Load Average itself is not very informative about the reasons of overload, so I want an additional characteristic: the percent of disk read operations that are done from cache. To measure it, I ...
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1answer
476 views

what are the executable ELF files respectively for static linker, dynamic linker, loader and dynamic loader?

In Linux, what are the executable ELF files respectively for static linker dynamic linker loader dynamic loader? Which of them are invoked by execve() by dlopen()? How are they invoked by execve(...
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1answer
757 views

Why does tar have a low CPU usage but high system load?

I'm using tar to backup my server once every day. Even though CPU usage (of the tar command and the system overall) doesn't go over 10%, my system load is like 3.98 3.71 3.82 when the script is ...
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1answer
2k views

Data getting overwritten with same timestamp in InfluxDB

There are some data in a csv file and it is getting overwritten if the timestamp is similar, for example: ip,time,name 1.1.1.1,2018-08-31 11:12:32,python 1.2.1.2,2018-08-31 11:05:28,oracle 1.3.1.3,...
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1answer
294 views

Why is my Fedora Linux system swapping like crazy? [closed]

Every few days, at differing times my system starts swapping like crazy and the load goes extremely high such that the system is very slow to respond. Sometimes I have waited 4 hours for it to recover,...
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1answer
854 views

Is ld.so an executable?

$ file /lib/ld-linux.so.2 /lib/ld-linux.so.2: symbolic link to i386-linux-gnu/ld-2.27.so $ readlink -f /lib/ld-linux.so.2 /lib/i386-linux-gnu/ld-2.27.so $ file /lib/i386-linux-gnu/ld-2.27.so /lib/i386-...
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1answer
209 views

High load on i5 with no visible reason

This has been reported as a bug to Debian. I have an i5 with high avg. load as shown in top, which for an idle system (with just sshd and 2 sessions) stays around 2.00 all the time. The machine hosts ...
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0answers
204 views

Directory size causing cpu load

I am monitoring several high volume directory using Zabbix. I used du command. I need to monitor in every 60sec. But problem is that Zabbix firing du command in every 60sec. it does not check whether ...
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2answers
2k views

How to get process load avg without tools

I want to list processes and their info in my program. The most information I can get from /proc/[pid]. How does top, htop etc get the average load of a process?
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677 views

CPU high load native_queued_spin_lock

I'm using Debian 9(stretch edition) kernel 4.9., hp dl385 g7 server with 32 cpu cores. NIC queues are tied to processor cores. Server is shaping traffic (iproute2 and htb discipline + skbinfo + ipset +...
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685 views

How to find concurrent number of connections per second with Apache?

A web-server hosting an application for a client ; which is high-volume or transaction server, it is required to find out "number of concurrent connections" currently in use by the server. This is ...
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1answer
56 views

System unresponsible - extreme load

Today my server became unresponsible I could not even log in to ssh, but as I am running my own server app on it I was able to recover a "top" data. Server was running but was not accepting any new ...
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62 views

Load > 2, does it matter?

I see the following load on one of our servers load average: 2.08, 2.09, 2.03 Is it too much and should be handled or can I just leave it? The server is a backup server with no direct usage, it ...
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0answers
203 views

Figuring out why the load average spiked at a given point in time

I rented a VPS a month ago, which I use to run a couple of web services behind a reverse proxy (JIRA, Confluence and gitlab), and I'm basically the only user of these services. During this month ...
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1answer
383 views

cgroups CPU quota vs system load metric

I'm wondering about if and how cgroups affects system load metric. Let's assume I'm running CPU-heavy process within cgroups with config: cpu.cfs_quota_us = 50000 cpu.cfs_period_us = 100000 So ...
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1answer
3k views

finding the root of high CPU load

The output of top command shows that CPU load is about 82!. The system has 32 cores. Normally, each core increment the load by one. How can I find out what is exactly happening? top - 11:20:43 up 88 ...
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0answers
580 views

Reducing Load On Server

I am having the strangest of issues with a cPanel server. Basically the server is using very little CPU and Memory in comparisson to what it has available but still the server's load keeps driving up ...
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0answers
60 views

multiple directories for sar command

Is it normal for below directories created by sar command -rw-r--r-- 1 root root 348948 Nov 3 23:50 sa03 -rw-r--r-- 1 root root 348757 Nov 3 23:53 sar03 -rw-r--r-- 1 root root 348948 Nov 4 23:50 ...
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0answers
616 views

Creating CPU/GPU/Memory load average history

In our research group we are running a computing server for deep learning with a number of NVIDIA Titan X graphics cards and quite some CPU cores. Given that it is a research lab and we have ~10 ...
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3answers
1k views

atd, batch // Setting the load limiting factor

I am launching non interactive jobs using batch, and I would like to increase the load limiting factor in order to use all 8 of my cores. I am on Ubuntu 16.04 LTS. From what I understand, batch uses ...
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1answer
41 views

What should I consider when deciding how many processes to run on an application host? [closed]

I work in operations, and as such am the primary decision maker for some deployments of our services. I work with a distributed application that involves several types of "services", some more ...
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2answers
44 views

Proper way distribute several scientific experiments across multiple servers?

In case I have 8 powerful machines, what is the proper way to distribute and balance the load from user applications and scientific experiments? Is virtualization right way to go, or is there any ...
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1answer
1k views

How to increase server load?

I am attempting to stress a server as much as I can before it goes into production. I’m using Jmeter and have been able to add a little more stress by modifying scripts. I’ve also modified JVM ...
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1answer
500 views

How to troubleshoot high load when kernel module is suspect?

I have noticed a bug with Ubuntu 14.04.4 LTS; if the NFS client loses connection to the NFS server the load on that system will spike to upwards of 30. The only way I've noticed to bring the load ...
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1answer
364 views

Is it possible to allocate RAM for all the code and data in an ELF file during loading?

I know that, in Linux, a page of RAM will not be allocated for a page of virtual address space until a virtual address in the page is referenced. However, I'm using embedded Linux in a device where ...
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2answers
508 views

System Load averages

As a disclaimer, I have read related question to this topic, but still a bit confused in regards to the situation I am seeing. Understanding system load and also: Understanding top and load average ...
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2answers
638 views

Loading & booting MINT from external SSD?

Linux Mint 17.3 Cinnamon-- I wish to load this on my old VAIO (64Mb/s, 8G RAM). I'm using WIN 8.1; however, I have a blank SSD that I'd like to boot Mint on-- soooooo, what do I do? I tried ...
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1answer
29k views

How to debug causes of excessive ksoftirqd resource usage?

man ksoftirqd indicates that: If ksoftirqd is taking more than a tiny percentage of CPU time, this indicates the machine is under heavy soft interrupt load. I'm working with a Debian Wheezy ...
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1answer
836 views

Python processes appearing and disappearing in top

I concurrently launched around 12 Python scripts on a 24-core server (Ubuntu 14.04 LTS x64). Each of Python script takes around one hour to complete. I see in top that they appear quite sporadically, ...
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blackscreen without backlight load

I have samsung np535u4c notebook with amd dual graphics. And my manjaro (arch based) randomly load on two state: normal & black screen without backlight. How to fix that? free amd drivers on board
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2answers
413 views

Analyse high load root cause

This is a cents 5.7 32bit VM running inside a vmware 5.5. host. I see high values of load average with low CPU usage. The VM has 4 vCPU’s and load sometimes reach 20. When I run vmstat I see high ...
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1answer
6k views

SSH server always available under heavy load

Is there a way my SSH server, and everything under it (including bash) can be always available under heavy load ? Maybe it could be some kind of a critical path, all in memory, with a dedicated CPU ...
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1answer
1k views

NAS: 100% system (kernel) cpu usage

I have a single core NAS My Live Duo. It runs Debian lenny release. I found via htop utility that it constantly use 100% of red cpu without any noticeable process to eat it. Than I checked via iostat ...
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340 views

My load is high. Top is strange. IOStats show low load

Load is high. This is my top top - 04:08:52 up 15 days, 15:14, 1 user, load average: 99.09, 107.09, 117.35 Tasks: 998 total, 125 running, 827 sleeping, 1 stopped, 45 zombie Cpu(s): 13.4%us, 75....
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2answers
591 views

Current disk load

I'm using iostat to get the current disk load each second with iostat -dx 1 (specially, %util column). However, I'd like to put this in a bash script and control the interval with the watch command ...
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1answer
2k views

High %sy in top output, how to debug?

We have 2 identically configured servers and one of them is showing a high %sy while the other does not. This would seem to indicate that the system is busy doing something. Cpu(s): 28.1%us, 66.3%sy,...
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CPU load and power management (frequency)

question background In my understanding the load value (shown e.g. by top) allows (together with the knowledge how many CPU cores the system has) a very quick assessment which share of the ...
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1answer
1k views

Why is Linux load average reported as the exponential moving average? [duplicate]

Why is the Linux load average over the past 1, 5 and 15 minutes reported as the exponential moving average, instead of just simple (unweighted mean) moving average? It seems to me that the simple ...