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Questions tagged [stress]

41 questions
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Understanding `stress` command in Linux

I'm trying to understand what stress command actually does in Linux, in particular -c option. My background is Physics, so I'm struggling with some concepts. Does stress -c launch 3 processes that consume 100% of 3 bounded CPU cores (for example…
Yere
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Set the cgroup in centos7 VM and select 4 cpus in this cgroup, make the stress task in this cgroup, but only one of them works

I use the stress tool and set up a cgroup in RT-centos7 VM. I try to make the stress work in the cgroup with using all cpus selected, but only one of cpus works which makes me puzzled. The stress script is below: #!/bin/bash stress --cpu 3 --io 3…
Blue_me
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Why I cannot compute stress terms correctly?

I am new to mathematica and I am trying to write a simple code to compute the stress and strains. I can compute the strain. I am trying to calculate stress, using the Hooke's Law: disp = {{u1[x, y, z], u2 [x, y, z], u3[x, y, z]}, {x, y,…
Shubhra
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how we will calculate time difference between 90%and 95% (Aggregate Report)

we have run 3000 samples total duration time is 4 min 45 sec how is it possible 99% of requests are taking time only 1 min 20 sec and only 1 % of requests take the rest of the time we have run 3000 samples total duration time is 4 min 45 sec how…
Anuradha
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linux ”stress -i 10“ , top viewing CPU performance find io_wait not increase

Why does command "stress -i 2" not increase the io_wait value? Only the system call went up
ryanxw
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How can I extract, edit and replot a data matrix in Abaqus?

Good afternoon, We´ve been working on an animal model (skull) applying a series of forces and evaluating the resultant stresses in Abaqus. We got some of those beautiful and colourful (blue-to-red) contour-plots. Now, we´d like to obtain a similar…
Fede Becerra
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How do I get 'stress --hdd' to stop at end of '--timeout' period?

I am using stress --hdd 1 --timeout 10s -v to stress the IO/disk on an Ubuntu system. Sometimes when running this command, I get something like: stress: info: [16420] dispatching hogs: 0 cpu, 0 io, 0 vm, 1 hdd ... stress: info: [16420] successful…
nabelekt
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Websocket client receive RST packet when the number of connections more than 7k

I use ws(websocket) client(github.com/gorilla/websocket, running on local host) to stress test ws server which is implemented by java Netty (running on remote centos 7.8 host with 2vcpu + 8Gb memory). Only the client start tcp keepalive…
zhuofanxu
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how to perform Jmeter API performance test with multiple backend systems?

I want to do POST API performance test with Jmeter for the end to end system. Backend architecture is as follows, API <-> [A system] <-API-> [B system] The problem is when I am setting up Jmeter POST API it just generates 200 ok status for [A…
Swaraj Waikar
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FloPy/Python warning when running river package MODFLOW?

I'm trying to add rivers to my model but this warning happens to be there when after I run it: WARNING: Unable to resolve dimension of ('gwf6', 'riv', 'period', 'stress_period_data', 'cellid') based on shape "ncelldim" What I'm doing is I get the…
Supernova
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How do Torrent Servers Maintain Connections to reduce server load

I understand that a torrent minimizes the server load by using other participating members to fetch content. One thing I am confused about is, the different parties are connected through the server anyway, therefore complete stress of Data exchange…
Shamim Hafiz - MSFT
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why my program takes 100% of my RAM on stress testing (72 GB)

I have a solution based on .net core 2.0 and it reaches 100% RAM (72 GB) in an hour on stress testing. I need to know if there is a any work around to force garbage collector without changing the code? Any environment level changes/third party…
Muqadar Ali
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Using stress-ng to mimic workload

I am want to use stress-ng to mimic workload. The end goal is to be able to load the system with different percentages of different tasks. For example 50% CPU, 25% IO etc. So I started with this command... sudo stress-ng -v --taskset 1 --sched fifo…
Joe Yeung
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Python Input Validation with multiple variables...simplified?

First, I've searched this site, a lot, and found other posts about this topic, even the same assignment I'm working on, so the code is very similar... However, there are a few things slightly different. I'm taking this course, using "Starting out…
deHart
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how can i get to know about my web site maximum capacity for the visitors at the same time

how can i get to know about my web site maximum capacity for the visitors at the same time? -kind of stress test for unexpected situations-
Bilgin Kılıç
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