CIFS performance is significantly lower than NFS in IBM PowerPC

Issue

• CIFS performance is significantly lower than NFS in IBM PowerPC. This issue does not occur in Intel x86_64.

# dd if=/mnt/nfs/testfile of=/dev/null bs=1M
5120+0 records in
5120+0 records out
5368709120 bytes (5.4 GB) copied, 47.4146 s, 113 MB/s
# dd if=/mnt/cifs/testfile of=/dev/null bs=1M
5120+0 records in
5120+0 records out
5368709120 bytes (5.4 GB) copied, 790.501 s, 6.8 MB/s