40 ms to decode one mp3 frame
Guest
#1171657
Hi, I am working with PXA270 processor. It takes nearly 40 ms to decode one mp3 frame. I have enabled data cache as well as the instruction cache. Please can you help me to reduce this decode time. Regards, Prashanth kumar Prashanth kumar wrote: > Hi, > > I am working with PXA270 processor. It takes nearly 40 ms to decode > one mp3 frame. I have enabled data cache as well as the instruction > cache. Please can you help me to reduce this decode time. > > Regards, > Prashanth kumar Have you configured the system clock and SDRAM controller/memory timing correctly? The chip will initialise at the crystal frequency (probably as low as 12MHz!), with lowest common denominator 'safe' memory timings. You configure and enable the clock multiplier and match the timings to the memory parts on your board. Clifford
Guest
#1171659
Clifford Slocombe wrote: > Prashanth kumar wrote: >> Hi, >> >> I am working with PXA270 processor. It takes nearly 40 ms to decode >> one mp3 frame. I have enabled data cache as well as the instruction >> cache. Please can you help me to reduce this decode time. >> >> Regards, >> Prashanth kumar > > Have you configured the system clock and SDRAM controller/memory timing > correctly? The chip will initialise at the crystal frequency (probably > as low as 12MHz!), with lowest common denominator 'safe' memory timings. > You configure and enable the clock multiplier and match the timings to > the memory parts on your board. > > Clifford Hi, The details regarding to the memory clock and run mode clock are , P15 C0 reg = 107c ccsr = 3000030e, cccr_a, = 2000000 clkcfg = 3 Run Mode clock: 182.0MHz (*14) Turbo Mode clock: 546.0MHz (*3.0, active) Memory clock: 91.0MHz (/2) Thank you Ragards, Prashanth Kumar Reply |