Hi Markus,
Can you please tell me what is the FW version you have on your ConnectX
cards?
Thanks, Erez
Hi Erez,
don't you see that behaviour in tcpdump? what kernel are you using?
On server side we have a 3.5 on client side a 3.11 kernel each of them with
kernel standard drivers/modules. I can see the same pattern of GRO
aggregation on the client that you mention but only if I disable TSO for
ib0 on the server side.
The test I'm running on the client is like this. The second and third read
run are definetly served by the NFS server side cache.
sysctl -w net.ipv4.tcp_mem="4096 65536 4194304"
sysctl -w net.ipv4.tcp_rmem="4096 65536 4194304"
sysctl -w net.ipv4.tcp_wmem="4096 65536 4194304"
sysctl -w net.core.rmem_max=8388608
sysctl -w net.core.wmem_max=8388608
mount -o nfsvers=3,rsize=262144,wsize=262144 10.10.30.251:/export /mnt
echo 3 > /proc/sys/vm/drop_caches
dd if=/mnt/xxx.iso of=/dev/null bs=1M count=5000
echo 3 > /proc/sys/vm/drop_caches
dd if=/mnt/xxx.iso of=/dev/null bs=1M count=5000
echo 3 > /proc/sys/vm/drop_caches
dd if=/mnt/xxx.iso of=/dev/null bs=1M count=5000
umount /mnt
Markus
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