I'm doing some testing of direct attached storage using SRP. When I use 'sync', the write performance drops off significantly below what the device is capable of for a given sustained write. The read shows something more along the lines of the expected performance. I'm using OFED 1.2.5.5. Is there some issue with OFED and using sync?
thanks, Kevin Harms fs121: # sg_dd if=/dev/zero of=dd.test oflag=dsync bs=4096 bpt=512 count=10000 time=1 time to transfer data: 0.721404 secs at 56.78 MB/sec 10000+0 records in 10000+0 records out fs121: # sync fs121: # sysctl -w vm.drop_caches=1 vm.drop_caches = 1 fs121: # sysctl -w vm.drop_caches=2 vm.drop_caches = 2 fs121: # sysctl -w vm.drop_caches=3 vm.drop_caches = 3 fs121: # sg_dd of=/dev/zero if=dd.test bs=4096 bpt=512 count=10000 time=1 time to transfer data: 0.091308 secs at 448.59 MB/sec 10000+0 records in 10000+0 records out _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
