The tag has no wiki summary.

learn more… | top users | synonyms

0
votes
1answer
15 views

How to benchmark memory in an embedded linux device?

Is there a generic utility to benchmark external memory device (eMMC, DDR) throughput on an embedded device (e.g. raspberry pi)? memtester, bonnie, bonnie++, memtest, dd? I've been running into ...
3
votes
0answers
25 views

How to generate graphs from lmbench results?

I need to use the lmbench benchmarking tool to get the system performance statistics. I am able to execute and run the results. In the results folder this is a MakeFile with this information # ...
0
votes
0answers
21 views

Interpreting bonnie++ sequential throughtput results: is my unterstanding right?

I have started since years to accumulate bonnie++ stats from different systems. Here is a shot from a rather fask disk: django ssd Samsung SSD 840 EVO 1TB with hdparm write cache enabled: Version ...
0
votes
3answers
58 views

Which commands or operations can be used to put the cpu under intense load?

I would like to measure latencies during high cpu usage but I don't have benchmarking tools like stress and I can't install them. Which operations do you recommend to put the cpu under intense load? ...
1
vote
1answer
42 views

Simple floating point benchmark that can be compiled from source?

I am interested in benchmarking some ARM platforms; can anyone suggest a simple benchmark with source code that can be used to benchmark floating point performance? A package such as a .deb file ...
5
votes
3answers
168 views

How to measure Firefox's startup time?

I would like to measure how much time it takes for some softwares to start. I know the command time but in the case of firefox (iceweasel for me on Debian), this command prints only the time I let ...
1
vote
1answer
46 views

question about installing Rally on OpenStack

I have a quick question that I'm going to install Rally to benchmark OpenStack and I've read it's documents here. Now, I don't know if I install Rally on a vm in OpenStack that there's no service on ...
1
vote
1answer
38 views

Can I use fio on a mounted device?

I'm using fio to get some broad read IOPS performance data for various storage configurations like this: fio --name=readiops --filename=/dev/md1 --direct=1 --rw=randread --bs=4k --numjobs=4 ...
2
votes
0answers
37 views

Using SLURM without a feature

Suppose my super computer has the following NODELIST's with the included features: NODELIST FEATURES NodeA (none) NodeB specialfeature and I am trying to benchmark ...
0
votes
0answers
141 views

Get CPU time for Benchmark in Bash Script

I'm using this Method here: http://giantdorks.org/alain/how-to-benchmark-individual-shell-script-sections-to-identify-slow-parts/ to Benchmark my Bashscript: RuntimePrint() { duration=$(echo ...
17
votes
3answers
1k views

Why is coreutils sort slower than Python?

I wrote the following script to test the speed of Python's sort functionality: from sys import stdin, stdout lines = list(stdin) lines.sort() stdout.writelines(lines) I then compared this to the ...
0
votes
0answers
28 views

How can we measure performance overhead resulting from writing to files or folders?

I have a tool which takes as input a folder or a file and then it logs operations done on that file or folder (modifying,deletion,creating new folders or files, etc). I was looking for a way to ...
0
votes
1answer
211 views

iozone runs fail with “No such file or directory” errors

I want to start using iozone to benchmark an aufs filesystem on a virtual machine on ubuntu. I tried following the manual to use relevant parameters, but I keep getting a weird error on most runs. I ...
1
vote
1answer
113 views

Measuring transfer speed of USB drive

I want to write a program to find out the average data transfer speed of my USB port. How do I go about implementing it? The only method I can think of is writing a large file to the path where the ...
7
votes
2answers
1k views

Simulate an unkillable process in D state

For catastrophe testing scenarios on out server environment we're looking for an easy way to make a process stuck in D (uninterruptible sleep) state. Any easy ways? An example C sample code would be ...
0
votes
0answers
145 views

RHEL & SUSE 2014 CPU & storage benchmarking tools

I have hundreds of Linux servers that we need to benchmark the CPU & Storage on. RAM & Networking would also be good. If possible I would to avoid installing a large suite, but not totally ...
3
votes
2answers
523 views

Read all files in folder and subfolders - progress and size

Command I have is: time find . -type f -print -exec cp {} /dev/null \; This command finds all files in current folder and subfolders, print the name of each file and copy each of them to /dev/null. ...
1
vote
1answer
148 views

ext4 to btrfs conversion: how many times the whole volume will be read during the process?

I want to convert the 3TB 80% full ext4 block device into btrfs and I want to estimate the time it will take. I understand that this process is disk-bound rather then cpu- or memory-bound. So can ...
3
votes
1answer
1k views

RFC 2544 / Y1564 software implementation

Is there any RFC 2544 and/or Y1564 software available for Linux? I'm aware that tools like iperf, bw-ng and bmon exist, but I was not able to find something that mimics Ethernet tester functionality ...
1
vote
2answers
144 views

dd command: Finding read/write throughput of a flash/SD?

I am running petalinux from sd card. And trying to find data copying rate from Sd card and from QSPI flash that is there on the Xilinx Zynq board. As suggested here , I am doing like this: ...
2
votes
2answers
300 views

Is there a good benchmark for virtual memory performance?

Aside from running memory benchmarks, has anyone used a benchmark that stresses the virtual memory subsystem? I'm curious to see how performance differs in virtual machines with and without EPT ...
11
votes
3answers
23k views

How can I benchmark my HDD?

I've seen commands to benchmark one's HDD such as this using dd: $ time sh -c "dd if=/dev/zero of=ddfile bs=8k count=250000 && sync" Are there better methods to do so than this?
7
votes
2answers
141 views

How can other processes affect measurements made with `time`?

If I time a process using the time command, I get output for 'real', 'user', and 'sys'. My understanding from this discussion is that 'real' is wall time, whereas 'user' and 'sys' are process time. ...
3
votes
3answers
457 views

Best way to benchmark different encryption solutions on my system

I want to compare different encryption solutions for encrypting my system, possibly different solutions for different parts of the system such as /usr or /home. In particular I look at dm-crypt ...
6
votes
2answers
5k views

Benchmark ssd on linux: How to measure the same things as crystaldiskmark does in windows

I want to benchmark a ssd (possibly with encrypted filesystems) and compare it to benchmarks done by crystaldiskmark on windows. So how can I measure approximately the same things as ...
0
votes
1answer
397 views

Floating point performance in Linux

I've tested Geekbench for my computer for both Windows and Linux. It seems that Linux loses markedly in floating point performance. Is there anything I can do about it? Install an optimization ...
3
votes
1answer
191 views

Bandwidth improvements expected from switching to Wayland or Mir?

I was intrigued by this answer regarding why X is not scalable. I'm unable to find any specific speed comparisons between x forwarding on these different protocols. How much % gain in network speeds ...
3
votes
1answer
1k views

Benchmarking Apache using ab

I was doing some performance testing for Apache using ab. Apache in our case is only working as a load balancer balancing load between two Liferay servers. Initially, I did the testing for 1000 ...
1
vote
2answers
165 views

how to uniformly execute benchmarks on linux

I am doing project on adapting Linux for scalable multi core architecture. I am testing Linux's performance with benchmarks. When I am running the benchmarks in the system then other programs like ...
2
votes
0answers
638 views

MPlayer benchmarking - realtime FPS counter

I was trying to use MPlayer as a simple benchmarking tools and I need it to show the real time FPS counter, either on the console or on the video playback itself. I googled around and I stumbled ...
4
votes
2answers
1k views

How to benchmark RAM memory with a Linux Distro?

I' ve just bought new RAM and I'd like to benchmark and compare with my old. How can I do that?
1
vote
2answers
4k views

How to test DNS speed?

I am using google open DNS. How can I measure the speed of a DNS server?
1
vote
1answer
121 views

How to configure Linux to run benchmarks as stable as possible?

I have several long running benchmarks (SPEC CPU 2006 benchmarks) to run on a Linux server. The server is running Gentoo Linux with a Linux Kernel 3.6.11. I saw some big differences between ...
1
vote
2answers
660 views

btrfs performance

I decided to mess around with btrfs and found some weird performance anomalies. The tests I've done are with with two external hard drives one formatted with ext4 the other btrfs. ext4 performance ...
3
votes
2answers
627 views

How to adjust time command to measure a program elapsed time

I'm trying to get the time that my program takes to finish (aka elapsed time) so I'm using the common time. What I get by doing this is 3 measurements: user, system and total. This is fine but I ...
3
votes
4answers
1k views

Invoking CPU Stress

Looking for an app or tool to invoke CPU usage on my virtual Linux and Unix guests. I found the app "stress" from a post on Stackoverflow, but curious what the Unix/Linux crowd would recommend.
2
votes
0answers
581 views

How to check/test internal card reader speed

I got new SD card claimed to be 10 class of speed, but internal Disk utility in linux after test showed up only 6th class of speed. How can I check my card reader speed to be sure that it's not the ...
4
votes
2answers
899 views

VM benchmark tools?

I would like to benchmark of few XEN-constallations: PV DomU HVM DomU with PV network and disk drivers HVM DomU with emulated IDE and PV network The base will be the same VM with the same ...
0
votes
0answers
140 views

Comparing the efficiency of Network Stack of two different Operating Systems

I want to compare the efficiency of Network Stacks of two different operating systems(Linux and Solaris) by measuring the amount of resources(context switches, systemcalls etc) that are consumed in ...
8
votes
1answer
4k views

How can I observe memory bandwidth?

I have an embedded Linux ARM system that is showing significantly less throughput than expected on both Ethernet and USB. I suspect the memory may be contributing. Is there a way to observe the memory ...
8
votes
3answers
987 views

How to average time commands?

I am timeing some of my commands. Now to average the measures, I'd like to run and time my commands a specified number of times, and get the results with a calculated mean and standard deviation. The ...
2
votes
1answer
382 views

Linux Router Load Benchmark

What tools and methods can be used to stress test a Linux-based router/proxy? On the router Squid, Apache Modproxy and Privoxy are installed. The purpose of the stress test is to determine which proxy ...
2
votes
1answer
1k views

Interpreting tiobench results

I'm running tiobench on my raid1 and it gives me the following results. Why is there ##### shown instead of throughput? Why does seq.reading with 8 threads use 2836% CPU? My results: $tiobench No ...
3
votes
2answers
326 views

benchmark tools for linux

I have developed a software with perl language based on the Spread Toolkit wich is a network messages manager through the network(messages software through the network), now I have to stress my ...
2
votes
1answer
119 views

Running comprehensive speed tests on a drive

I'm wondering if anybody knows of any free packages, scripts or command line tools that can report a comprehensive speed test on a drive (e.g. generating random data, and testing how long it takes to ...
2
votes
1answer
1k views

CLI filesystem benchmark for random read/write with specified block size

I'm in search of a filesystem benchmark utility. I basically want to run a test which should be able to do random reads/writes on a specified drive with a given block size. e.g. a 4K random write on a ...