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[armhf][Nokia-7215]High CPU caused by entropy.py (#13694)

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Why I did it
High CPU utilization by entropy.py

How I did it
Remove entropy script as it does not work anymore and is no longer needed for bullseye(202205).
In Buster(202012) the max available poolsize (entropy_avail) for entropy is 4096 and our entropy.py script was based on this value. With the change in kernel to bullseye on 202205 this entropy poolsize was changed to 256 which also causes our script to fail.

This script was initially added to provide SW assistance to improve the system entropy value available early on in the Sonic boot sequence on buster.
On bullseye (Linux kernel 5.10) this is no longer needed as this feature has been improved.

How to verify it
run "top" command to check CPU usage.
This commit is contained in:
Pavan-Nokia 2023-02-09 16:29:06 -05:00 committed by mssonicbld
parent 94e59a841e
commit 979e9a7d9d
3 changed files with 0 additions and 24 deletions
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1
platform/marvell-armhf/sonic-platform-nokia/debian/sonic-platform-nokia-7215.install
View File

@ -2,5 +2,4 @@ nokia-7215_plt_setup.sh usr/sbin
7215/scripts/nokia-7215init.sh usr/local/bin
7215/service/nokia-7215init.service etc/systemd/system
7215/sonic_platform-1.0-py3-none-any.whl usr/share/sonic/device/armhf-nokia_ixs7215_52x-r0
entropy.py etc/
inband_mgmt.sh etc/

22
platform/marvell-armhf/sonic-platform-nokia/entropy.py
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@ -1,22 +0,0 @@
#!/usr/bin/python
import fcntl, struct
import time
from os import path
RNDADDENTROPY=0x40085203
def avail():
if path.exists("/proc/sys/kernel/random/entropy_avail"):
with open("/proc/sys/kernel/random/entropy_avail", mode='r') as avail:
return int(avail.read())
else:
return int(2048)
if path.exists("/proc/sys/kernel/random/entropy_avail"):
while 1:
while avail() < 2048:
with open('/dev/urandom', 'rb') as urnd, open("/dev/random", mode='wb') as rnd:
d = urnd.read(512)
t = struct.pack('ii', 4 * len(d), len(d)) + d
fcntl.ioctl(rnd, RNDADDENTROPY, t)
time.sleep(30)

1
platform/marvell-armhf/sonic-platform-nokia/nokia-7215_plt_setup.sh
View File

@ -25,7 +25,6 @@ main()
fw_uboot_env_cfg
echo "Nokia-IXS7215: /dev/mtd0 FW_ENV_DEFAULT"
python /etc/entropy.py &
/bin/sh /etc/inband_mgmt.sh
}