On Mon, Nov 04, 2013 at 11:13:19PM +0800, Miao Xie wrote: > This patchset improve the latency of the space reservation when doing the > delalloc inode flush. As we know, the current code would wait for > the completion all the ordered extents in the filesystem. It was unnecessary, > we can finish the wait and try to do reservation once again earlier if we > get enough free space. It can reduce the wait time and make the perfermance > up. > > We did the buffered write test by the sysbench on my box, the following > is the result. > Memory: 2GB > CPU: 2Cores * 1CPU > Partition: 20GB(SSD) > w/ w/o > rndwr-512KB-1Thread-2GB 120.38MB/s 110.08MB/s > rndwr-512KB-8Threads-2GB 119.43MB/s 110.96MB/s > seqwr-512KB-1Thread-2GB 99.676MB/s 98.53MB/s > seqwr-512KB-8Threads-2GB 111.79MB/s 99.176MB/s > > rndwr-128KB-1Thread-2GB 139.23MB/s 95.864MB/s > rndwr-128KB-8Threads-2GB 126.16MB/s 96.686MB/s > seqwr-128KB-1Thread-2GB 100.24MB/s 100.95.MB/s > seqwr-128KB-8Threads-2GB 126.51MB/s 100.26MB/s > > rndwr: random write test > seqwr: sequential write test > 512KB,128KB: the size of each request > 1Thread, 8Threads: the number of the test threads > 2GB: The total file size > > Miao Xie (7): > Btrfs: remove unnecessary initialization and memory barrior in > shrink_delalloc() > Btrfs: wait for the ordered extent only when we want > Btrfs: pick up the code for the item number calculation in flush_space() > Btrfs: fix the confusion between delalloc bytes and metadata bytes > Btrfs: don't wait for all the async delalloc when shrinking delalloc > Btrfs: don't wait for the completion of all the ordered extents > Btrfs: rename btrfs_start_all_delalloc_inodes >
Thank you for this, I've been wanting to do this for months but I keep getting sucked into bug hell, remind me to kiss you at LSF. Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
