Questions tagged [benchmark]

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Is there anything similar to CrystalDiskMark for UNIX?

If you're shopping for an SSD, you've surely seen one of those screenshots from CrystalDiskMark with a few green squares, and the 2x4 matrix with results of doing read/write tests for the given ...
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A lot of “sh: 1: /var/tmp/lmbench/hello: not found” lines during lmbench-run processing

During running sudo lmbench-run I got 1786 lines of sh: 1: /var/tmp/lmbench/hello: not found lines in /var/lib/lmbench/results/x86_64-linux-gnu/ubuntu.0 file. How could I fix it? Thank you!
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1answer
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FIO benchmark replay fails in case of size 0

Abhishek Srivastava Member 0 1 post Report post Posted yesterday at 01:46 PM I have downloaded Financial application traces in standard *.spc format and then converted it into fio format. Now when ...
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1answer
173 views

Does mixing up GTK and Qt applications slow down the machine?

Usually it is recommended to either use GTK or Qt apps in the operating system, but not mixing them both together. Example: When using KDE it seems to be obvious to use KMail (Qt) instead of ...
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1answer
113 views

Printing milliseconds with GNU time

I am using GNU time for benchmarking and would like to measure real, user and sys time to the nearest millisecond. That is, I want to measure seconds to 3 decimal places, not the default 2. Does GNU ...
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486 views

Ubuntu 18.04 CPU governor in powersave mode getting in the way of performance

I have an Intel i7 6700HQ. Min frequency: 800 mhz Max frequency: 2.7 Ghz Max frequency with turbo-boost: 3.5 Ghz Using Geekbench 4 to stress and benchmark CPU, I got VERY different results with /sys/...
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53 views

TCP performance for OpenVPN vs delay

I have got some issue in TCP performance depended on delay. My lab schema: CPE --- (p1) Router (p2) --- Server The CPE connects to the Server by OpenVPN using TCP. I know about TCP-over-TCP but ...
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31 views

Record filesystem activity

I would like to record all filesystem activity so that I can later replay it at will (for benchmarking purposes). What's the best way of doing that? I considered strace, but rejected that because it ...
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2answers
440 views

Linux utility to bench mark clock speed of CPU

I have a Linux PC with a 3.4 GHz CPU. I must check this processor to see if it actually runs at that speed. Is there a benchmark available? I ran sysbench but it only provides time of completion, and ...
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1answer
1k views

FIO reporting slow write speeds while DD reports fast ones

According to most disk benchmarks, sequential write speeds are typically very close to the read speeds. Mine are in the ~500MB/s range. $ dd if=/dev/zero of=tempfile bs=1M count=5120 conv=notrunc ...
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1answer
44 views

What does the CPU consumption in top mean when a CPU is assigned to a single process?

Being on Linux I have "CPUAffinity= 0 1 3" set in system.conf. I also use "taskset -cp 2 $pid" to assign a CPU to a single process. But what does the CPU consumption for the process in top now mean? ...
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1answer
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Why do diskspd and fio generate odd numbers on Linux vs. Windows?

UPDATE Thanks to Anon's answer, I figured out that the file system was at fault - I used NTFS. The following are the results using FAT32. Windows: diskspd64 -b128K -d5 -o32 -t1 -W0 -Sh -w0 cdm 508, ...
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1answer
649 views

How does FIO benchmark set IOdepth?

NOTE: My question stems from this other U&L Q - What exactly is iodepth in fio? I want to know how internally FIO sets I/O depth. I.e., one of the parameters we submit to FIO when we run it is "...
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1answer
152 views

How to improve rsync execution time on OmniOS (illumos-based)?

I am testing illumos in some of its variants, currently OmniOS. As I was benchmarking io-bound processes, I saw that rsync was significantly slower in respect to my reference, FreeBSD 12-CURRENT. ...
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1answer
37 views

Disk benchmarking program which doesn't produce CPU load

I'm want to mix CPU and IO intensive benchmarks on the same machine with different levels of CPU utilization and IO throughput. Unfortunately I couldn't produce an high IO load without stressing the ...
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1answer
72 views

Benchmark a USB host transfer speed with Busybox

I want to benchmark a USB host on my custom machine. It has Busybox V1.20.2. From google, I see that it can be done using dd command. For testing, i copy blender.exe (76MB) to the home folder in ...
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1answer
387 views

Why is `sync + drop_caches` not dropping caches?

I have a test case for journalctl where it spends several seconds reading from the disk. But if I try to benchmark multiple runs of the test case, I find that it's impossibly fast after the first run....
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3answers
543 views

Process creation time, shell script and system call overhead

I have a machine dual booted with Arch Linux and Ubuntu (16.04). I have recently started using the Kakoune text editor, and noticed that its startup time is drastically different depending on which ...
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875 views

cryptsetup, LUKS, dm-crypt benchmark

I'm working on embedded software, where I used the cryptsetup to create an encrypted disk space over a NFS ethernet standard connection... I'm interested to understand the writing speed that this disk ...
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2answers
4k views

How can I measure the speed/performance of a program?

Recently, I was looking at the performance impact of tools such as strace. For instance, this blog post uses the default metrics given by dd. I wanted to do some measurements myself but with other ...
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Comparing I/O schedulers

I intend to compare different three I/O schedulers: "noop", "cfq", and "deadline" and I plan to compare them for both random reads and writes. So far, the only meaningful cases that I have identified ...
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1answer
395 views

How to delay bash script until there's enough idle cores to run it?

I'm a student who wants to benchmark a NGS pipeline, monitoring performance according to how many cores it has allocated to it and the size of the input file. For this reason, I wrote a bash script to ...
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74 views

How to measure time spent accessing file data over network-attached storage?

For a program running on a (Linux) server in a network-attached storage (NAS) environment, how can I measure the amount of time spent transferring data between the server and the network? The time ...
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1answer
3k views

Flexible RAM Benchmarking Tool

I'm trying to prove that an application I developed is saturating the memory bandwidth. For pure bandwidth benchmarking I'm aware that there's STREAM, but it only measures the maximum sequential burst ...
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0answers
1k views

How to check if my graphics card (driver) is working properly? [Debian 9]

I have a nvidia graphics card and for getting it to work I only added contrib non-free to my repositories' sections in synaptic (reluctantly), installed nvidia-driver and restarted. In the NVIDIA X ...
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1answer
108 views

Find out how much time a process spent in it self

The time command can be used to get an estimate of CPU time for a given job. However, it appears that its output includes the time spent in child processes. Is there a way to get the time spent in the ...
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3k views

Using dd on Mac OS: conv=fsync equivalent?

I'm running an experiment where I benchmark the speed of reading and writing with and without caching. On Linux, using 'conv=fsync' as an operand makes sure that the output file is entirely physically ...
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1answer
100 views

FIO Benchmark Tester: Error when building from source

I encountered some errors when I was trying to build the FIO from source with the 'make' command. It seems I may be missing something. Does anyone what it is? root@DSI:/home/main/fio-2.2.10# make ...
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1answer
2k views

How to read the data from SysBench And UnixBench when testing VPS

i want to test several linux VPS using bench mark tools as i reead there are 2 indestry standart tools called unixBench and SysBench I compiled them and executed them on the VPS And i have results : ...
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1answer
1k views

How to test speed of an s3 bucket mounted via s3fs-fuse?

I have an s3 share that's mounted via [s3fs-fuse][1] and would like to run some speed tests to compare throughput on DreamHost's DreamObjects vs Amazon S3. Everything is mounted and working just fine ...
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2answers
107 views

Testing CPU intensity of a single command or function

Is there a command that's useful for doing a benchmark test on a separate command or function; to see how cpu intensive it is? Preferably something similar to how you can report the duration of a ...
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1answer
2k views

Unable to use bonnie++ for measuring I/O performance

To troubleshoot some performance issues, we want to do some FS benchmark assessment using bonnie++, but whenever I try to execute, it only prints the usage without actually running. Can anyone ...
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1answer
92 views

Is there a way to benchmark the find command (to compare with locate)?

Reading the accetped answer of the question locate vs find: usage, pros and cons of each other which tells that locate's main advantage is speed I wanted to do some testing, whether I can benefit from ...
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5k views

Universal non-bash `time` benchmark alternative? [closed]

For comparing run times of scripts between different shells, some SE answers suggest using bash's built-in time command, like so: time bash -c 'foo.sh' time dash -c 'foo.sh' ...etc, for every shell ...
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1answer
533 views

read() randomly a file with O_DIRECT flag on, getting a serious performance hit on 32 MB files size?

I am running a benchmark of HDD read that bypasses page cache. I have set O_DIRECT flag and memaligned my memory. This function attempts a random read within a file(lseek64() used). The data I am ...
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382 views

Benchmark /dev/shm

I am currently developing a software that needs fast inter-process and temporary I/O communication (images as well as big hdf5 arrays). The "lifetime" of the data is different and dependent on several ...
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1answer
558 views

HDDs, outer track vs inner track performance benchmarks?

I am interested in relating the position of a file on disk and the I/O R/W performance characteristics associated with this position. I have been able to find two benchmarks, but they are both for ...
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1answer
4k views

running iperf over ssh

I'm trying to benchmark the network connection between 2 ubuntu servers on which I don't have root privileges. I did manage to download and start iperf-2.0.9 on both boxes. My problem is I can't ...
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1answer
150 views

Benchmark shared folder on Virtualbox?

I'm trying to benchmark what I can read and write from the shared folder on my Virtualbox machine is? From my local host machine I have a shared folder, and on the guest virtualized machine, I would ...
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1answer
2k views

Write-benchmark of gnome-disks

Does the write-benchmark of gnome-disks write back the original data after the test? It is destructive? The Benchmark Settings window only states this: Please back up important data before using the ...
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2answers
502 views

How to benchmark different shells [closed]

I want to know if shell 1 is better for a job than shell 2 with a test that I handle maybe with shell 3 for example ksh, dash, bash or zsh. I use a test script that builds my projects, starts it,feed ...
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0answers
195 views

Benchmarking under SELinux Sandbox with Phoronix Test Suite

I would like to run the Phoronix Test Suite 6.2.2 under the SELinux sandbox on Fedora 23, but I can't execute it using $ sandbox ./phoronix-test-suite. I probably don't have the correct SELinux type. ...
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1answer
2k views

What do the benchmarks in HardInfo mean?

The program hardinfo is included by default with Lubuntu as a system profiler. It can run 6 different types of benchmarks: -CPU Blowfish -CPU Cryptohash -CPU Fibonacci -CPU N-Queens -FPU FFT -...
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293 views

Random write on DISK benchmark shows high read rate on iostat

I am running a random write benchmark directly on some disks (HDD & SDD) and I am getting some weird output data on the iostat monitor. Besides the usual write rate, there is a read rate that I ...
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2answers
344 views

confused about dd write speed and VFS page cache

After reading some articles on the Linux VFS page cache and the tunable parameters like dirty_ratio i was under the impression that page cache would operate as both read and write caching layer. But ...
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1answer
11k views

How to interpret `cryptsetup benchmark` results?

Summary: I can run cryptsetup benchmark and sort the results, but seek guidance in their interpretation. E.g., should I give more weight to encryption speed or decryption speed? Should key-derivation ...
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1answer
203 views

Benchmarking With SELinux

I've been performing some benchmarking tasks on freshly installed CentOS machines with SELinux enabled and disabled. The tasks include copying files of various sizes, sending variable amounts of data ...
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0answers
82 views

How can I benchmark or audit an embedded kernel?

Is there a reliable or industry standard way to benchmark or audit embedded kernel performance? The target of the audit is to determine the time that the kernel spends in certain critical section, ...
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1answer
123 views

IO benchmark tools block size impact?

Many IO benchmark tools (fio, dd, etc...) provide way to set block size. Lets say that I change 4K to 64k and test read/write on mounted SATA disk. I will get higher data throughput in sequential ...
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1answer
215 views

Where to find information about tests from Phoronix test suite?

Phoronix Test Suite is a linux benchmarking tool made of tests and suites of tests. To print all available test phoronix-test-suite list-available-tests To print all available suites phoronix-...