Quoting Qu Wenruo (2013-11-07 00:51:50) > Add a new btrfs_workqueue_struct which use kernel workqueue to implement > most of the original btrfs_workers, to replace btrfs_workers. > > With this patchset, redundant workqueue codes are replaced with kernel > workqueue infrastructure, which not only reduces the code size but also the > effort to maintain it. > > More performace tests are ongoing, the result from sysbench shows minor > improvement on the following server: > CPU: two-way Xeon X5660 > RAM: 4G > HDD: SAS HDD, 150G total, 40G partition for btrfs test > > Test result: > Mode|Num_threads|block size|extra flags|performance change vs 3.11 kernel > rndrd 1 4K none +1.22% > rndrd 1 32K none +1.00% > rndrd 8 32K sync +1.35% > seqrd 8 4K direct +5.56% > seqwr 8 4K none -1.26% > seqwr 8 32K sync +1.20% > > Changes below 1% are not mentioned. > Overall the patchset doesn't change the performance on HDD. > > Since more tests are needed, more test result are welcomed. Thanks for working on this, it's really good to move toward a single set of workqueues in the kernel. Have you benchmarked with compression on? Especially on modern hardware, the crcs don't exercise the workqueues very much. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
