On Wed, 2010-08-04 at 12:39 -0400, Theodore Ts'o wrote: > This version fixes three bugs in the 2nd patch of this series that > caused kernel BUG when the system was under race. We weren't accounting > with t_oustanding_credits correctly, and there were race conditions > caused by the fact the I had overlooked the fact that > __jbd2_log_wait_for_space() and jbd2_get_transaction() requires > j_state_lock to be write locked. So without the vfs patches, I don't see much change with this patchset (similar to the last). novfs + j_state lock Throughput 763.105 MB/sec 8 procs Throughput 1056.81 MB/sec 4 procs Throughput 681.761 MB/sec 2 procs Throughput 409.25 MB/sec 1 procs vs no vfs + j_state lock + jdb2 scalability queue Throughput 767.778 MB/sec 8 procs Throughput 1069.58 MB/sec 4 procs Throughput 679.786 MB/sec 2 procs Throughput 401.419 MB/sec 1 procs But with the vfs patchset, there's a nice increase @8cpus. vfs + j_state lock Throughput 1061.44 MB/sec 8 procs Throughput 1126.55 MB/sec 4 procs Throughput 706.306 MB/sec 2 procs Throughput 402.102 MB/sec 1 procs vs vfs + j_state lock + jdb2 scalability queue Throughput 1214.21 MB/sec 8 procs Throughput 1175.49 MB/sec 4 procs Throughput 716.294 MB/sec 2 procs Throughput 402.988 MB/sec 1 procs I'll post perf log data tomorrow. thanks -john -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
