On Wed, 2011-03-16 at 10:14 -0400, Bryan Schumaker wrote: > I guess I misunderstood what to publish test results for? I know I included numbers on one of the patches (commit 82f2e5472e2304e531c2fa85e457f4a71070044e, copied below)... I'll find the numbers you're asking about and post them. > > -Bryan > > commit 82f2e5472e2304e531c2fa85e457f4a71070044e > Author: Bryan Schumaker <bjschuma@xxxxxxxxxx> > Date: Thu Oct 21 16:33:18 2010 -0400 > > NFS: Readdir plus in v4 > > By requsting more attributes during a readdir, we can mimic the readdir plus > operation that was in NFSv3. > > To test, I ran the command `ls -lU --color=none` on directories with various > numbers of files. Without readdir plus, I see this: > > n files | 100 | 1,000 | 10,000 | 100,000 | 1,000,000 > --------+-----------+-----------+-----------+-----------+---------- > real | 0m00.153s | 0m00.589s | 0m05.601s | 0m56.691s | 9m59.128s > user | 0m00.007s | 0m00.007s | 0m00.077s | 0m00.703s | 0m06.800s > sys | 0m00.010s | 0m00.070s | 0m00.633s | 0m06.423s | 1m10.005s > access | 3 | 1 | 1 | 4 | 31 > getattr | 2 | 1 | 1 | 1 | 1 > lookup | 104 | 1,003 | 10,003 | 100,003 | 1,000,003 > readdir | 2 | 16 | 158 | 1,575 | 15,749 > total | 111 | 1,021 | 10,163 | 101,583 | 1,015,784 > > With readdir plus enabled, I see this: > > n files | 100 | 1,000 | 10,000 | 100,000 | 1,000,000 > --------+-----------+-----------+-----------+-----------+---------- > real | 0m00.115s | 0m00.206s | 0m01.079s | 0m12.521s | 2m07.528s > user | 0m00.003s | 0m00.003s | 0m00.040s | 0m00.290s | 0m03.296s > sys | 0m00.007s | 0m00.020s | 0m00.120s | 0m01.357s | 0m17.556s > access | 3 | 1 | 1 | 1 | 7 > getattr | 2 | 1 | 1 | 1 | 1 > lookup | 4 | 3 | 3 | 3 | 3 > readdir | 6 | 62 | 630 | 6,300 | 62,993 > total | 15 | 67 | 635 | 6,305 | 63,004 > > Readdir plus disabled has about a 16x increase in the number of rpc calls an > is 4 - 5 times slower on large directories. Right. Those are the numbers that convinced me... -- Trond Myklebust Linux NFS client maintainer NetApp Trond.Myklebust@xxxxxxxxxx www.netapp.com -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
