On Wed, 2006-05-24 at 10:28 +0200, Wolfgang Woehl wrote: > Hi, I want to try what Lee mentioned a couple of times recently: Low latency > audio performance with 2.6 mainline -- no mingo-patch, no rt-lsm (athlon xp > 2600+, asus a7v8x-x, hdsp. On a 2.4.26 with lck patches this system has good > lowlat performance, solid jackd with -p 64 -n 2, so the hardware should be > ok. Ah well, looong dropouts on deep reiserfs walks that never show up in > jackd's messages but that's hopefully another story). > > Got 2.6.16.16 from kernel.org. If I understood Lee right I could expect a > jackd with -p 64 -n 2 to work just fine but it doesn't. Loads of xruns. What > am I missing? What can I do to find out? > -p 64 -n 2 is pushing the envelope of what the mainline kernel can do. 128 or 256 should be solid. It will depend on the hardware and driver set. Reiserfs is a poor choice of filesystem for low latency. Also make sure you are in realtime mode - depending on the distro, the realtime LSM may still be required. I guess you are using the PAM method to enable non-root realtime? Lee
