Did some quick tests to Samba 3.6 from the current cifs git tree which includes Jeff's async read performance improvements. About a 4x performance increase on GiGE, maxing the network adapter (slightly slower writing to local disk file). /* As expected, running earlier cifs (3.0 kernel), the network utilization on single large file copy is 20-25% over GigE */ [stevef@smfhomegateway ~]$ dd of=/dev/zero if=/mnt/target-file-1GB-size bs=8M count=125 ^C85+0 records in 84+0 records out 704643072 bytes (705 MB) copied, 29.5827 s, 23.8 MB/s /* try it again to make sure it is not a fluke - current cifs suffers from synchronous dispatch of read in single file copy case and also small read sizes */ [stevef@smfhomegateway ~]$ dd of=/dev/null if=/mnt/target-file-1GB-size bs=8M count=125 125+0 records in 125+0 records out 1048576000 bytes (1.0 GB) copied, 43.4298 s, 24.1 MB/s /* Load the current cifs-2.6.git module - backported to 2.6.40-FC */ [stevef@smfhomegateway ~]$ dd of=/dev/null if=/mnt/target-file-1GB-size bs=8M count=125 125+0 records in 125+0 records out 1048576000 bytes (1.0 GB) copied, 9.06156 s, 116 MB/s /* Writing to local file on this low end SATA drive instead of dev/null slows things down a little but still close to wire speed [stevef@smfhomegateway ~]$ dd of=foo if=/mnt/target-file-1GB-size bs=8M count=125 125+0 records in 125+0 records out 1048576000 bytes (1.0 GB) copied, 11.4381 s, 91.7 MB/s -- Thanks, Steve -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
