High CPU usage [ntfs-3g]

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mkaand
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Joined: 06 Jan 2008
Posts: 307
Location: Istanbul
PostPosted: Sat Sep 19, 2020 6:45    Post subject: High CPU usage [ntfs-3g] Reply with quote
Hi Everyone,

I was using quite old build 38xxx on my WRT1900ACv1 recently I upgrade 44048 and 44406 both of them I see high CPU usage. I run TOP command and I figured out

ntfs-3g -o compression,direct_io,big_writes /dev/sda1 /tmp/mnt/sda1

This is the reason of problem. I mount my NTFS external drive to my router. Seems like ntfs-3g using too much CPU. Is there anyway to fix that? Or I should go back to 38XXX build? Thanks.
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mkaand
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Joined: 06 Jan 2008
Posts: 307
Location: Istanbul
PostPosted: Sat Sep 19, 2020 12:51    Post subject: Reply with quote
I tried couple of latest builds in 2020 and after 42174 ntfs-3g uses high cpu. I stay with 42174.
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aurion
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Joined: 25 Apr 2021
Posts: 1
PostPosted: Sun Apr 25, 2021 17:28    Post subject: Reply with quote
Hi, I found this via Google. I wanted to know if you found a solution? My USB drive speed is limited to 20 MB/s on DD-WRT r44715 because of the 100% CPU usage, meanwhile I got 40-50 on stock.

Maybe the mount string "ntfs-3g -o compression,direct_io,big_writes /dev/sdax /tmp/mnt/x" can be edited to remove high CPU -o options?

I tried mounting them manually (disabled Automatic Drive Mount) without any option and another time with only big_writes. I still have the same behavior. This is what "top" looks like:

Code:
Mem: 240436K used, 13852K free, 0K shrd, 43152K buff, 149620K cached
CPU:  1.1% usr 63.8% sys  0.0% nic  5.5% idle 12.4% io  0.0% irq 16.9% sirq
Load average: 4.33 1.23 0.43 5/117 1604
  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
 1578     1 root     R     1752  0.6   0 18.1 ntfs-3g -o big_writes /dev/sda1 /tmp/mnt/T_Drive
 1407     2 root     SW       0  0.0   0  5.4 [usb-storage]
   12     2 root     SW       0  0.0   1  5.4 [kworker/1:0]
 1398     2 root     SW       0  0.0   1  4.8 [kworker/1:2]
 1581     2 root     DW       0  0.0   0  4.6 [kworker/0:3]
 1589     2 root     SW       0  0.0   1  4.5 [kworker/1:7]
 1590     2 root     DW       0  0.0   1  4.3 [kworker/1:8]
    4     2 root     SW       0  0.0   0  3.5 [kworker/0:0]
 1594     2 root     SW       0  0.0   1  3.1 [kworker/1:9]
 1587     2 root     RW       0  0.0   1  3.0 [kworker/1:5]
 1586     2 root     SW       0  0.0   1  3.0 [kworker/1:4]
  230     2 root     SW       0  0.0   0  2.8 [kworker/0:1]
  205     2 root     SW       0  0.0   0  2.3 [kswapd0]
 1555     2 root     DW       0  0.0   0  2.2 [ksmbd:52786]
  159     2 root     SW       0  0.0   1  2.1 [kworker/1:1]
   11     2 root     RW       0  0.0   1  2.1 [ksoftirqd/1]
 1394     2 root     DW       0  0.0   0  1.8 [kworker/0:2]
 1583     2 root     SW       0  0.0   0  1.2 [kworker/0:5]
 1593     2 root     SW       0  0.0   0  0.8 [kworker/0:9]
    3     2 root     SW       0  0.0   0  0.8 [ksoftirqd/0]
    7     2 root     SW       0  0.0   0  0.8 [rcu_sched]
 1582     2 root     SW       0  0.0   0  0.6 [kworker/0:4]
 1584     2 root     SW       0  0.0   0  0.6 [kworker/0:6]
 1595  1553 root     R     1456  0.5   1  0.2 top
 1093     2 root     SW       0  0.0   0  0.2 [ksmbd-vlan2]
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mkaand
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Joined: 06 Jan 2008
Posts: 307
Location: Istanbul
PostPosted: Tue Apr 27, 2021 12:05    Post subject: Reply with quote
Hi

I no longer use this router. I bought ASUS AX86U.
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