I was trying to create a usb bootable for W20 iso. now the default program uses 7zip. my system utilization was only 1% to 3 % most. Why ? Why can't 7zip use all the resources it has on the system to complete the task faster ?
Are you talking about compressing or extracting?
Usually extracting doesn't require as much resource as compressing. And if you are compressing, make sure you are using the "High" or ultra preset.
Usually extracting doesn't require as much resource as compressing. And if you are compressing, make sure you are using the "High" or ultra preset.
If I'm not mistaken, 7zip is single threaded. And in compression/decompression of files on an ssd, the bottleneck is how fast a single cpu core can do the task. So if you have a 128core processor and a quad core processor, and you use a single threaded program, 7zip will still use only one thread due to the nature of how it works (assuming clockspeed and IPC and architecture is the same).
7zip was designed keeping in mind only utilization of single core/thread.
You can try setting its priority to real time in task manager before performing any jobs and see if anything improves..
You can try setting its priority to real time in task manager before performing any jobs and see if anything improves..
not designed but the the nature of compression/decompression that it cant be run multithreaded.
OP: os limitations make it difficult/not possible even though system is multi processor.
LZMA format is the default 7-zip format, supports multi-threading and P4's hyper-threading: https://www.7-zip.org/7z.html
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7-Zip Command-Line Examples
This tutorial shows 7-Zip on the command line. Compress, extract, archive and optimize with the 7za.exe executable. | TheDeveloperBlog.com
thedeveloperblog.com
[SOLVED] - Using CPU to it's full potential during Zip File Decompression 7Zip
Hello All, While creating/ splitting Zip files using 7Zip, I get the option to choose the number of threads which can be used to Compress the file more quickly. However, while decompressing, the cores and threads are not being utilized to their full potential. Task manager shows just 5 to 10%...
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I think, Extracting/Compressing is File I/O operation which mainly uses your disk performance, CPU is there just to support it. Same task will run faster on SSD/NVMe as compared to HDD, even if you have high-end CPU.