Disk speed half of what they really are #489
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Hi, same here, same system and shell |
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Same here. |
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I also have this issue, both on OpenSUSE Leap 15.0 (Gnome 3.26.2) and OpenSUSE Tumbleweed (Gnome 3.32.2). When comparing to iotop and copy dialog, the speed seems always to be half of the real read and write. Shows the same wrong value in the tooltip and the open dialog. One of the machines I tested this on has just one physical hard drive, the other has two, this has no effect.
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does it change the behavior if you set the refresh time to 1000ms? |
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Yeah same behavior even with refresh rate set to 1000ms. |
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Hi! |
JuniorPolegato
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Issue: paradoxxxzero#489 The original code was accumulating sectors of disks/block devices and partitions, duplicating the read and write sectors counting. Now the code gets the block device list and just accumulates their sectors. I found a division of these sectors (512 bytes each) by 1024 and 8 (8192 => 8k) to get MiB, but that's not right, it is needed to divide by 2k (or *512/1024/1024) not 8k, maybe due to the accumulation of block devices and partitions, however, when operating on one partition (dd if=/dev/sda1 of=/dev/null bs=4k), it duplicates the accumulated sectors, so you need to divide by 4k, not 8k, getting half the speed. But if you are operating directly on a disk device (dd if=/dev/sda of=/dev/null bs=4k), does not duplicate the accumulated sectors, so you need to divide by 2k, not 8k, getting half of half the speed. Nowadays, disk space is in MB, not in MiB, so I adjusted this too.
JuniorPolegato
added a commit
to JuniorPolegato/gnome-shell-system-monitor-applet
that referenced
this issue
Dec 5, 2021
Issue: paradoxxxzero#489 The original code was accumulating sectors of disks/block devices and partitions, duplicating the read and write sectors counting. Now the code gets the block device list and just accumulates their sectors. I found a division of these sectors (512 bytes each) by 1024 and 8 (8192 => 8k) to get MiB, but that's not right, it is needed to divide by 2k (or *512/1024/1024) not 8k, maybe due to the accumulation of block devices and partitions, however, when operating on one partition (dd if=/dev/sda1 of=/dev/null bs=4k), it duplicates the accumulated sectors, so you need to divide by 4k, not 8k, getting half the speed. But if you are operating directly on a disk device (dd if=/dev/sda of=/dev/null bs=4k), does not duplicate the accumulated sectors, so you need to divide by 2k, not 8k, getting half of half the speed. Nowadays, disk space is in MB, not in MiB, so I adjusted this too.
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Error still persistent: Gnome version: 44.5 |
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Hello,
Ubuntu 18.04 X64, shell 3.28. The numbers show for disk transfer speed are about half of what iotop and Nautilus are showing. The laters have the same numbers.
Thanks.
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