Posts by dragmore

Quote from popcornmix

I wonder if the smsc95xx.turbo_mode or smsc95xx.packetsize settings of the ethernet driver may help. Have a read here:
Frequent buffering, high bitrate video playback from SMB share to RPi3 with OSMC

and then try adjusting the settings. I believe 4.7.6 kernel will default to "smsc95xx.turbo_mode=Y smsc95xx.packetsize=2560".
Might be interesting to try disabling turbo_mode and/or changing the packetsize value.

hmm.. do i have to rebuild the kernel?
or is this a userspace parameter?

pi 2 - Abmysal NFS read performance RPi2 - Raspberry Pi Stack Exchange
7. alpha 7 (kodi 17b3)
Im having a hard time pinpointing why my RPi2 have such a terrible NFS read performance. Background: Using openelec or Libreelec i cannot read large BD-rips file structures without having heavy framejumping/freezes etc.. So i started the investigation.

• RPi2 is running 4.7.6 Linux Kernel
• Via ethtool i have confirmed that it has infact negotiated it self to 100mbps against my switch port
• My Synology NAS 414j can easily pump out 40-70mbps depending on the client
• All my switches are 1gig
• Using dd=file.foo from the nas to my RPi2 of=/dev/null gives me consistant NFS read performance at around 700KB/s
• Using iostat iowait is hovering around 22-30% during the dd transfer and as well as under BD file views.
• Ive overclocked all parts on the RPi2 to see if that would help... it doesnt..
• Using these mount options doesnt fix it either:

mount -t nfs 10.100.10.91:/volume1/Video /storage/MOVIES2 -o udp,noatime,rsize=32768,wsize=32768,nolock,nfsvers=3Linux LibreELEC 4.7.6 #1 SMP Fri Oct 7 18:36:25 BST 2016 armv7l GNU/Linux

• The strange thing is that it worked a few months ago and on my other mediaboxes with better HW, this aint an issue...

Soo..... anyone have any idea what can be the culprit?UPDATE: I installed the latest fedora 25beta for Arm on another SD, rebooted and redid the tests... and with standard mount default parameters.. guess what: 10,7MB/S with 15% iowait... I redid the tests 5 times.. all with the same result.. so the conlusion is: LibreELECs busybox OS disto is fuubar.. no idea where tho..br TE