hi, when A and B establishes a call , and user B say something ,user A keeps silence ,then A PC's cpu fluctuate frome 20 to 50%. if user A say something then A cpu reduce to 10%. (user A PC is Interl pentium Duale2140 1.6Ghz ,2G memory ,OS :xp.) when A cpu is 40% ,I find stack as follows: ntkrnlpa.exe!ExAllocatePoolWithTag+0x8ab ntkrnlpa.exe!MmIsDriverVerifying+0xa08 hal.dll!HalClearSoftwareInterrupt+0x342 pjsua_vc8d.exe!inner_prod+0x62 pjsua_vc8d.exe!pitch_xcorr+0x3a pjsua_vc8d.exe!open_loop_nbest_pitch+0x225 pjsua_vc8d.exe!nb_encode+0x698 pjsua_vc8d.exe!speex_encode_native+0x1f pjsua_vc8d.exe!sb_encode+0x112 pjsua_vc8d.exe!speex_encode_int+0x73 pjsua_vc8d.exe!spx_codec_encode+0x8f pjsua_vc8d.exe!put_frame_imp+0x2cb pjsua_vc8d.exe!put_frame+0x1a5 pjsua_vc8d.exe!pjmedia_port_put_frame+0x77 pjsua_vc8d.exe!write_port+0x3e1 pjsua_vc8d.exe!get_frame+0x536 pjsua_vc8d.exe!pjmedia_port_get_frame+0x77 pjsua_vc8d.exe!play_cb+0x5e pjsua_vc8d.exe!PaPlayerCallback+0x1fa pjsua_vc8d.exe!NonAdaptingProcess+0x28c pjsua_vc8d.exe!PaUtil_EndBufferProcessing+0x290 pjsua_vc8d.exe!ProcessingThreadProc+0x644 kernel32.dll!GetModuleFileNameA+0x1b4 --------------------------------- ???????????? -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080514/008a76af/attachment.html