All Questions
Tagged with io performance
42
questions
2
votes
0
answers
91
views
Continuously writing multiple files: sequential write or random write I/O?
I am trying to choose an SD card to get the best I/O performance for an application which basically does this:
Writes a 4K 30FPS video stream
Writes a VGA video stream
Writes multiple log files of ...
- 21
0
votes
1
answer
266
views
Extremely slow json.load of a network response in WSL
Decoding a json response takes a lot of time on my system - Precision 5520 (11th gen I7, 64 GB) with Linux 20.04 LTS under WSL2 under Windows 10 Pro. Here is the relevant part of the code:
def ms_now()...
1
vote
0
answers
42
views
btt in blktrace tool does not report any data in android
I have collected trace data in file parse.bin with blktrace in android.
Then I use btt to parse the cellocted data as below:
/ssd/blktrace/btt/btt -i parse.bin
But it does not report any data. The ...
- 11
1
vote
0
answers
48
views
How to prevent Windows 10 and/or my computer from going completely crippled while utilizing file copying over USB?
I have a monster PC running Windows 10. There are zero known hardware issues, and it's managed by me, a poweruser. There are no weird things slowing it down. It runs at expected speed normally.
It is ...
- 11
1
vote
0
answers
109
views
Why does transferring files to a USB stick grind my computer to a halt?
I'm currently syncing a bunch of files to a USB stick.
Regardless of what USB version it uses, and regardless of my motherboard's ability to transfer USB data, why does it cause my entire computer to ...
- 11
0
votes
1
answer
57
views
HDD I/O fast at first but gradually decreases? [duplicate]
I was benchmarking my WD 500 GB HDD in Ubuntu Disks several times and saw that the read speeds started at 140 MB/s, but it consistently would gradually decrease by a few MB/s with seemingly no floor. ...
- 113
2
votes
1
answer
1k
views
why keyboard input lags while using Zoom app
Every time I am using Zoom App or Google Meet, The keyboard input is delayed terribly (about 3s+) while typing in any kind of application.
I tried to reinstall Zoom again, deactivate my antiVirus (...
- 21
0
votes
0
answers
363
views
Poor and strange disk performance with VirtualBox (macOS host, Windows 10 guest)
I have VirtualBox 6.1.4 running on macOS Mojave. I'm working with a Windows 10 guest and it seems I have some performance problems with disks.
Testing with Aja System Test, on macOS I see numbers ...
- 111
2
votes
0
answers
2k
views
Cannot diagnose slow disk read speed, bottleneck, in Ubuntu
I have the same processes running on 2 (or more machines) for which we notice a massive slow down in disk i/o on some machines. The PCs have very similar hardware (I am happy to post dmidecode if ...
- 121
1
vote
0
answers
1k
views
Very high disk usage due to reading from CbsPersist...log
My personal laptop is Windows 7, Dell, 8 CPU Cores and 8GB of RAM.
It operates very slowly, especially when launching software, and I think especially when starting up (but not only).
Looking at ...
- 111
0
votes
1
answer
308
views
Does 'Write cliff' phenomenon only happen to SSD disks?
First of all, I am new to disks, I just know the basics. I am trying to improve performance of a software with heavy I/O and I need to understand how my SAS disks work in terms of read and write speed....
- 3
0
votes
1
answer
2k
views
iostat + how to solve latency on disks
we use iostat -x and check for the await column - per device it shows the total time spent waiting plus the actual handling of the request by the disk
iostat -yzx 5
Device: rrqm/s wrqm/s ...
- 871
1
vote
1
answer
441
views
Poor concurrent IO performance, how to trade latency for throughput?
I have a fairly IO-heavy GPU-limited process that needs to read in random files from a folder in a local hard drive. When the process is running by itself, I get a consistent throughput of around 30 ...
- 111
0
votes
1
answer
619
views
Is it possible to calculate theoretical i/o throughput of CPU?
I have machine with i7-2600K and I'm turning it into storage server. It's using P67 chipset which uses 20 Gb/s DMI interface to CPU. There are also pcie x8/x8 slots on board wired directly to CPU. I ...
- 820
1
vote
0
answers
434
views
How can I measure disk I/O waiting time for an active CPU?
There are already many tools to measure the % of the CPU waiting time during I/O operations, like dstat. Nevertheless, I am looking for a way to measure the waiting time % of the active cores.
In ...
- 193