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by pmmd
Thu Apr 03, 2014 12:31 am
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 114621

Re: Call for beta testers: FIQ_FSM USB driver rewrite

@pmmd: [...] I may consider implementing the "nuclear option" for FIQ latency - deep in the ARM11 cache controller is the ability to lock down a cache way - basically 1/4 of the I- or D-cache. By locking 1/4 of the I-cache to the FIQ, we can practically guarantee execution latency (at the terrible ...
by pmmd
Wed Apr 02, 2014 7:54 pm
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 114621

Re: Call for beta testers: FIQ_FSM USB driver rewrite

Can you retry the test without using a cpu-intensive program? I.e. just stream data from the device and pipe it to /dev/null?[..] Ok lets see: $ gst-launch-0.10 v4l2src ! fakesink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock...
by pmmd
Tue Apr 01, 2014 11:26 pm
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 114621

Re: Call for beta testers: FIQ_FSM USB driver rewrite

No visible improvement on stk1160 Video grabber. I can confirm. $ lsusb Bus 001 Device 004: ID 05e1:0408 Syntek Semiconductor Co., Ltd STK1160 Video Capture Device $ uname -a Linux **** 3.10.33+ #659 PREEMPT Wed Mar 19 16:33:57 GMT 2014 armv6l GNU/Linux $ cat /boot/cmdline.txt dwc_otg.fiq_enable=1 ...

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