RNGD service consuming high CPU usage after pointing /dev/random to behave as urandom
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I have executed these commands while installing my application on Ubuntu system.
The following commands are specific for /dev/random to behave as urandom
sudo rm /dev/random
sudo mknod /dev/random c 1 9 # make /dev/random behave as urandom. 1 and 9 are device numbers of urandom
adding above changes to rc.local to make system changes persistent after reboot
sed -i -e "/^exit 0/ isudo rm /dev/random" -e "/^exit 0/ isudo mknod /dev/random c 1 9" /etc/rc.local
After executing these command I restarted the rng-tools
sudo systemctl restart rng-tools
And suddenly after restarting rng-tools , top command shows 100% CPU usage by rngd service.
My System Information:
NAME="Ubuntu"
VERSION="16.04.1 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.1 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
UBUNTU_CODENAME=xenial
and when I restore /dev/random to its normal behavior and restart the rng-tools and the CPU usage changes to normal.
16.04 cpu-load
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
add a comment |
I have executed these commands while installing my application on Ubuntu system.
The following commands are specific for /dev/random to behave as urandom
sudo rm /dev/random
sudo mknod /dev/random c 1 9 # make /dev/random behave as urandom. 1 and 9 are device numbers of urandom
adding above changes to rc.local to make system changes persistent after reboot
sed -i -e "/^exit 0/ isudo rm /dev/random" -e "/^exit 0/ isudo mknod /dev/random c 1 9" /etc/rc.local
After executing these command I restarted the rng-tools
sudo systemctl restart rng-tools
And suddenly after restarting rng-tools , top command shows 100% CPU usage by rngd service.
My System Information:
NAME="Ubuntu"
VERSION="16.04.1 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.1 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
UBUNTU_CODENAME=xenial
and when I restore /dev/random to its normal behavior and restart the rng-tools and the CPU usage changes to normal.
16.04 cpu-load
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
1
Consider going to the Package page packages.ubuntu.com/xenial/rng-tools where there is a "File a Bug" link?
– waltinator
Mar 27 at 4:06
I have asked the question before raising bug here. answers.launchpad.net/ubuntu/+source/rng-tools/+question/679718
– Sachin Aryal
Apr 2 at 11:43
add a comment |
I have executed these commands while installing my application on Ubuntu system.
The following commands are specific for /dev/random to behave as urandom
sudo rm /dev/random
sudo mknod /dev/random c 1 9 # make /dev/random behave as urandom. 1 and 9 are device numbers of urandom
adding above changes to rc.local to make system changes persistent after reboot
sed -i -e "/^exit 0/ isudo rm /dev/random" -e "/^exit 0/ isudo mknod /dev/random c 1 9" /etc/rc.local
After executing these command I restarted the rng-tools
sudo systemctl restart rng-tools
And suddenly after restarting rng-tools , top command shows 100% CPU usage by rngd service.
My System Information:
NAME="Ubuntu"
VERSION="16.04.1 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.1 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
UBUNTU_CODENAME=xenial
and when I restore /dev/random to its normal behavior and restart the rng-tools and the CPU usage changes to normal.
16.04 cpu-load
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
I have executed these commands while installing my application on Ubuntu system.
The following commands are specific for /dev/random to behave as urandom
sudo rm /dev/random
sudo mknod /dev/random c 1 9 # make /dev/random behave as urandom. 1 and 9 are device numbers of urandom
adding above changes to rc.local to make system changes persistent after reboot
sed -i -e "/^exit 0/ isudo rm /dev/random" -e "/^exit 0/ isudo mknod /dev/random c 1 9" /etc/rc.local
After executing these command I restarted the rng-tools
sudo systemctl restart rng-tools
And suddenly after restarting rng-tools , top command shows 100% CPU usage by rngd service.
My System Information:
NAME="Ubuntu"
VERSION="16.04.1 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.1 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
UBUNTU_CODENAME=xenial
and when I restore /dev/random to its normal behavior and restart the rng-tools and the CPU usage changes to normal.
16.04 cpu-load
16.04 cpu-load
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
asked Mar 27 at 3:25
Sachin AryalSachin Aryal
1012
1012
1
Consider going to the Package page packages.ubuntu.com/xenial/rng-tools where there is a "File a Bug" link?
– waltinator
Mar 27 at 4:06
I have asked the question before raising bug here. answers.launchpad.net/ubuntu/+source/rng-tools/+question/679718
– Sachin Aryal
Apr 2 at 11:43
add a comment |
1
Consider going to the Package page packages.ubuntu.com/xenial/rng-tools where there is a "File a Bug" link?
– waltinator
Mar 27 at 4:06
I have asked the question before raising bug here. answers.launchpad.net/ubuntu/+source/rng-tools/+question/679718
– Sachin Aryal
Apr 2 at 11:43
1
1
Consider going to the Package page packages.ubuntu.com/xenial/rng-tools where there is a "File a Bug" link?
– waltinator
Mar 27 at 4:06
Consider going to the Package page packages.ubuntu.com/xenial/rng-tools where there is a "File a Bug" link?
– waltinator
Mar 27 at 4:06
I have asked the question before raising bug here. answers.launchpad.net/ubuntu/+source/rng-tools/+question/679718
– Sachin Aryal
Apr 2 at 11:43
I have asked the question before raising bug here. answers.launchpad.net/ubuntu/+source/rng-tools/+question/679718
– Sachin Aryal
Apr 2 at 11:43
add a comment |
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1
Consider going to the Package page packages.ubuntu.com/xenial/rng-tools where there is a "File a Bug" link?
– waltinator
Mar 27 at 4:06
I have asked the question before raising bug here. answers.launchpad.net/ubuntu/+source/rng-tools/+question/679718
– Sachin Aryal
Apr 2 at 11:43