OpenVPN takes a lot CPU on GoFlex Home

[auzn]

I have a GoFlex Home as a download server. I just noticed that OpenVPN sometimes takes as high as 45% CPU when I am downloading. I am not sure if this is normal, or I didn't config OpenVPN properly. Does anyone else also see this high CPU usage happen?

[Guidobelix]

I have a similar problem with a PP4. The only workaround I could find up to now was to reboot the system every couple of days, as I have noticed that this generally happens after a while the PP4 is running.

If anybody has a hint......

Thanks
Guido

[tomcheng76]

check with this post
viewtopic.php?f=30&t=2452

this is my lsmod under goflex net
$this->bbcode_second_pass_code('', '[root@alarm system]# lsmod
Module Size Used by
xt_tcpudp 1952 1
iptable_filter 1124 1
ipt_MASQUERADE 1496 2
iptable_nat 2297 1
nf_conntrack_ipv4 11483 1
nf_defrag_ipv4 1083 1 nf_conntrack_ipv4
nf_nat_ipv4 3196 1 iptable_nat
nf_nat 11092 3 ipt_MASQUERADE,nf_nat_ipv4,iptable_nat
nf_conntrack 63614 5 ipt_MASQUERADE,nf_nat,nf_nat_ipv4,iptable_nat,nf_conntrack_ipv4
ip_tables 10358 2 iptable_filter,iptable_nat
x_tables 11923 4 ip_tables,xt_tcpudp,ipt_MASQUERADE,iptable_filter
mv_cesa 11034 0
tun 18310 4
ipv6 300997 18
autofs4 23037 2
')

you should also have a mv_cesa module ?

it is under 5% cpu usage when i am using the openvpn, although my 3G network is slow, so downloading using the VPN should not be fast

[auzn]

I have already installed the openssl-cryptodev . Using lsmod, the mv_cesa also shows up.

My openvpn goes to almost 30%~40% cpu when downloading at about 500KB/s. Maybe this is the best this cpu can do?

[tomcheng76]

You can post your openvpn conf

This is mine
$this->bbcode_second_pass_code('', '
port 1194
proto udp
dev tun
server 10.0.0.0 255.255.255.0 #you may choose any subnet. 10.0.0.x is used for this example.

ca ca.crt #certs are optional. you may choose to go with keys or passwords instead.
cert server.crt
key server.key
dh dh1024.pem

push "redirect-gateway def1"

push "dhcp-option DNS 8.8.8.8"

#the following commands are optional
keepalive 10 120
comp-lzo
persist-key
persist-tun
status /var/log/openvpn-status.log
verb 3

log-append /var/log/openvpn
#last updated May 29, 2011')

[Socaltom]

try turning off comp lzo,
I turned it off on my PPV2 and I believe its faster. If its using lots of CPU on downloads, its probably trying to compresse the files.
Tom