From: bon@hertz.ikp.physik.tu-darmstadt.de   
      
   Hello,   
      
   the Blackmagic debug probe uses a CDCACM device to provide a gdb   
   server and flashing access to embedded Cortex devices. For the needed   
   transaction on JTAG or SWD, a lot of USB transactions are   
   needed. Read speed from the devices is mostly limited by USB and   
   SWD/JTAG speed. With the same SWD/JTAG speed settings, reading from   
   the device on Leap42.3 with KOTD (e.g. 5.12.0-rc8-1) results in only   
   half the read speed of the current Leap42.3 kernel (5.3.18-lp152.72).   
      
   Do others see USB speed problems with KOTD?   
      
   Tanks   
      
   --   
   Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de   
      
   Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt   
   --------- Tel. 06151 1623569 ------- Fax. 06151 1623305 ---------   
      
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