On 2013-11-08 16:39, Gerd Hoffmann wrote: > Hi, > >> OK, then here is the first issue I ran into while trying libusbx (git >> head, i.e. 1.0.17+: The new stack causes significant latency issues that >> makes it almost unusable for pass-through of USB audio devices (some >> headset in my case). Reverting usb-linux and disabling libusb over QEMU >> git head makes things work again. I'll have to stick with this for now >> as it is affecting my work environment. >> >> Any spontaneous ideas how to analyse or even resolve this? > > Try setting isobsize property to something smaller than 32 (which is the > default).
OK, isobsize=2 and isobufs=32 helped, possibly other combinations as well - but not just reducing isobsize or increasing isobufs. Any theory about this? How can we find better defaults? Jan -- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux
