Pavel Emelyanov <xemul-bzQdu9zFT3WakBO8gow8eQ@xxxxxxxxxxxxxxxx> writes: >> While I try to get this to compile, > > That's good news! Thanks a lot! Ok, I got it to compile and tested it by copying a large file into an S3QL FUSE file system using different block sizes. At first glance, things look fantastic. With kernel 3.2: Blocksize: 4k 131072000 bytes (131 MB) copied, 7.76037 s, 16.9 MB/s Blocksize: 8k 131072000 bytes (131 MB) copied, 2.48469 s, 52.8 MB/s Blocksize: 16k 131072000 bytes (131 MB) copied, 2.21868 s, 59.1 MB/s Blocksize: 32k 131072000 bytes (131 MB) copied, 2.0455 s, 64.1 MB/s Blocksize: 64k 131072000 bytes (131 MB) copied, 1.83897 s, 71.3 MB/s Blocksize: 96k 131072000 bytes (131 MB) copied, 1.72298 s, 76.1 MB/s Blocksize: 128k 131072000 bytes (131 MB) copied, 2.10194 s, 62.4 MB/s Blocksize: 256k 131072000 bytes (131 MB) copied, 1.96788 s, 66.6 MB/s Blocksize: 512k 131072000 bytes (131 MB) copied, 2.42342 s, 54.1 MB/s Blocksize: 1024k 131072000 bytes (131 MB) copied, 1.6651 s, 78.7 MB/s With 3.5-pre and write-back patches: Blocksize: 4k 131072000 bytes (131 MB) copied, 5.50489 s, 23.8 MB/s Blocksize: 8k 131072000 bytes (131 MB) copied, 1.43694 s, 91.2 MB/s Blocksize: 16k 131072000 bytes (131 MB) copied, 0.967118 s, 136 MB/s Blocksize: 32k 131072000 bytes (131 MB) copied, 0.707767 s, 185 MB/s Blocksize: 64k 131072000 bytes (131 MB) copied, 0.605011 s, 217 MB/s Blocksize: 96k 131072000 bytes (131 MB) copied, 0.573445 s, 229 MB/s Blocksize: 128k 131072000 bytes (131 MB) copied, 0.51943 s, 252 MB/s Blocksize: 256k 131072000 bytes (131 MB) copied, 0.458335 s, 286 MB/s Blocksize: 512k 131072000 bytes (131 MB) copied, 0.452351 s, 290 MB/s Blocksize: 1024k 131072000 bytes (131 MB) copied, 0.446027 s, 294 MB/s However, I suspect that most of the gain is really because with the patch most of the data is still in the kernel cache when dd finishes and hasn't yet been received by the FUSE client. Is there a way to force flushing of the fuse cache, so that I can measure the time for dd + final flush? Best, -Nikolaus -- »Time flies like an arrow, fruit flies like a Banana.« PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C -- 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
