[linrad] Re: Increased CPU usage
Hi All, I recently wrote: > Under RH9 I do not see the problem with normal parameters > as those ones Daniel sent, but when setting silly parameters > I see near 100% load with 02.28 while 02.21 shows only about > 50% load. . . . This was just a mistake. I goofed with the parameter files and ended up running two channels under 02-21 but only a single channel under 02-28. A doubled work load is then quite reasonable When going back to Suse 9.1 I find I can not at all reproduce my previous findings. Now, when running Daniels parameters I find a CPU load of 5.9% with linrad-02.28 but with Linrad 02-21 I find 23.5%. It is the other way around now - and the times are clearly incorrect. The Pentium III can not do the work with 5.9% CPU load!! Checking with "system monitor" Shows the total load to be identical, 42% for both Linrad versions. (9% when Linrad is not running) John was right:-) There is a bug in the timing function under Suse 9.1!! 73 Leif / SM5BSZ # This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
[linrad] Re: Increased CPU usage
Hello John, Hmmm, in my experience the CPU load reported by the getrusage function under Linux is quite reliable. I do not know how I could use the parallel port to show which thread is running in a multi-threaded program like Linrad. As I understand it, threads can be stopped at any point in case the scheduler thinks it has been running too long. Sending a message to the parallel port saying one particular thread is waiting on a semaphore will not show all the times when this particular thread is not running. There is another way however. I can set silly parameters in Linrad to provoke the CPU load to grow up to the point where screen and mouse become affected. Under Suse 9.1 this happens when the Linrad CPU meter shows 102% when I run Linrad-02.28 on the Pentium III. With exactly the same parameters, (2 RF channels, fft1 window power of sin=6, fft2 window power of sin=2, slowest possible fft routines and 2 x16 bits for audio output ) Linrad-02.21 runs happily at a CPU load of 50% and I setting maximum window parameters does not cause more than 60% CPU load with not even the slightest trace of any overload problem. There is a real problem here. I have no idea what it is but I have verified that it is present under good old Red Hat 9 which still has the old implementation of getrusage which reports CPU load individually for each thread:-) Under RH9 I do not see the problem with normal parameters as those ones Daniel sent, but when setting silly parameters I see near 100% load with 02.28 while 02.21 shows only about 50% load. I can see that the wideband dsp thread (fft1 + fft2) increases from 40% in 2.21 to 80% in 2.28. I do not know why this happens, but I can easily use the parallel port and an oscilloscope as you suggest to find out where this particular thread spends its time in case some simple writes to the screen will not show it. I am pretty sure I did something silly. Hopefully I can correct it without introducing new problems. 73 Leif >My experience with the OS telling me what the OS is doing is not good. > Of course there are 'reasons' for whatever OS behaviour! But generally OS > numbers about OS usage are in my experience, total garbage. > >I find it better to put a bit out to the parallel port and measure what > is going on with an o-scope. 1 = busy, in linrad, whatever; 0 = in OS > (whatever that means). There are many parallel port bits so they can allow > one to time various routines, etc. > >If you do do this experiment, be prepared for the REAL surprises!! > >Just my humble opinion !! >john > > > > On Sun, 8 Apr 2007, Leif Asbrink wrote: > > > Hello Daniel, > > > > Thanks for info:-) > > > > I am now able to reproduce similar results - but I > > have no idea at the moment what they mean. > > > > I am looking at CPU load with and without sound output. > > Under Suse 9.1 I observe the following: > > Linrad-02.21 Linrad-02.28 > > PIV 2.66 GHz, Sound ON8.3%7.8% > > PIV 2.66 GHz, Sound OFF 4.3%3.9% > > PIII 800 MHz, Sound ON24% 28% > > PIII 800 MHz, Sound OFF 15% 17% > > It is similar with svgalib, the X11 server is innocent ;-) > > > > > > I have tried Red Hat 9 (kernel 2.4.20) on the Pentium III > > and I find 20% with sound on and 12% with sound OFF. It > > does not matter whether I try 02-21 or 02-28. > > > > I will try some other Linux distributions on the > > PentiumIII to see if something interesting can be > > detected. > > > > > > 73 > > > > Leif / SM5BSZ > > > > > > # > > This message is sent to you because you are subscribed to > > the mailing list . > > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > > To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> > > To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> > > Send administrative queries to <[EMAIL PROTECTED]> > > > > > # > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> > To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> > Send administrative queries to <[EMAIL PROTECTED]> > # This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
[linrad] Re: Increased CPU usage
Hi all, My experience with the OS telling me what the OS is doing is not good. Of course there are 'reasons' for whatever OS behaviour! But generally OS numbers about OS usage are in my experience, total garbage. I find it better to put a bit out to the parallel port and measure what is going on with an o-scope. 1 = busy, in linrad, whatever; 0 = in OS (whatever that means). There are many parallel port bits so they can allow one to time various routines, etc. If you do do this experiment, be prepared for the REAL surprises!! Just my humble opinion !! john On Sun, 8 Apr 2007, Leif Asbrink wrote: > Hello Daniel, > > Thanks for info:-) > > I am now able to reproduce similar results - but I > have no idea at the moment what they mean. > > I am looking at CPU load with and without sound output. > Under Suse 9.1 I observe the following: > Linrad-02.21 Linrad-02.28 > PIV 2.66 GHz, Sound ON8.3%7.8% > PIV 2.66 GHz, Sound OFF 4.3%3.9% > PIII 800 MHz, Sound ON24% 28% > PIII 800 MHz, Sound OFF 15% 17% > It is similar with svgalib, the X11 server is innocent ;-) > > > I have tried Red Hat 9 (kernel 2.4.20) on the Pentium III > and I find 20% with sound on and 12% with sound OFF. It > does not matter whether I try 02-21 or 02-28. > > I will try some other Linux distributions on the > PentiumIII to see if something interesting can be > detected. > > > 73 > > Leif / SM5BSZ > > > # > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> > To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> > Send administrative queries to <[EMAIL PROTECTED]> > # This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
[linrad] Re: Increased CPU usage
Hello Daniel, Thanks for info:-) I am now able to reproduce similar results - but I have no idea at the moment what they mean. I am looking at CPU load with and without sound output. Under Suse 9.1 I observe the following: Linrad-02.21 Linrad-02.28 PIV 2.66 GHz, Sound ON8.3%7.8% PIV 2.66 GHz, Sound OFF 4.3%3.9% PIII 800 MHz, Sound ON24% 28% PIII 800 MHz, Sound OFF 15% 17% It is similar with svgalib, the X11 server is innocent ;-) I have tried Red Hat 9 (kernel 2.4.20) on the Pentium III and I find 20% with sound on and 12% with sound OFF. It does not matter whether I try 02-21 or 02-28. I will try some other Linux distributions on the PentiumIII to see if something interesting can be detected. 73 Leif / SM5BSZ # This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
[linrad] Re: Increased CPU usage
Hello Leif, I use VESA 1280x1024 @ 60Hz / 24bit with X11. The values I sent before are with a signal selected. Percentages change a little with the selected filter bandwidths (+-3%). Without selecting a signal the figures are: 02.27: no FFT2: 12% with FFT2: 28% 02.19: no FFT2: 9% with FFT2: 26% Hope it helps. Daniel, DL3IAE Original-Nachricht Datum: Fri, 6 Apr 2007 23:26:16 +0200 Von: Leif Asbrink <[EMAIL PROTECTED]> An: "Linrad mailinglist" Betreff: [linrad] Re: Increased CPU usage > Hello Daniel, > > I tried the parameters that you sent. (without fft2) > These are the results: > > Pentium IV at 2.66 GHz, Debian Etch, Linrad-02-28: 4% > Pentium IV at 2.66 GHz, Debian Etch, Linrad-02.21: 5% > Pentium III at 800 MHz, Suse 9.1, Linrad-02.28: 7% > Pentium III at 800 MHz, Suse 9.1, Linrad-02.21: 18% > > This is in terminal mode with svgalib. > > Under X11 the load is similar on the Pentium IV > but it is about 16% on the Pentium III for both > Linrad-02.21 and 02-28. > > Linrad-02-28 should be identical to 02-27 when it comes to > timings. The differences are in the calibration routines only. > > The differences I see between the latest and earlier versions > go in the opposite direction to what you observe. The difference > (by a factor of about 2.5) is very large and shows that I > corrected some error. Presumably I did not do it right since > you observe a change in the opposite direction. > > Are you running with svgalib or under X11? If X11, what is the > screen size and colour depth that you use? > > 73 > > Leif > > > > > > Hello Leif, > > > > there seems to be significant increase from 02.23 to 02.27 regarding the > CPU usage. > > > > On my system (AMD Duron 1,3 GHz, 512Mb RAM) I see the following figures: > > > > Linux (Suse 9.1): > > > > 02.19 (02.23 is the same) > > FFT2 off: 19% > > FFT2 on: 37% > > > > > > 02.27 > > FFT2 off: 36% > > FFT2 on: 53% > > [EMAIL PROTECTED] > > > > > > Win2K: > > wlr 02.27 > > > > FFT2 off: 22% > > FFT2 on: 37% > > > > > > This is with the same parameter files for all versions. It doesn't > bother me much, just curious to know why. > > > > On ON5GN's system there is not much of an increase but Pierre is using > modern hardware. > > > > > > 73 > > > > Daniel, DL3IAE > > > > -- > > http://dl0ger-eme.dd8il.de/ > > > > "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... > > Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail > > > > # > > This message is sent to you because you are subscribed to > > the mailing list . > > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > > To switch to the DIGEST mode, E-mail to > <[EMAIL PROTECTED]> > > To switch to the INDEX mode, E-mail to > <[EMAIL PROTECTED]> > > Send administrative queries to <[EMAIL PROTECTED]> > > > > # > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > To switch to the DIGEST mode, E-mail to > <[EMAIL PROTECTED]> > To switch to the INDEX mode, E-mail to > <[EMAIL PROTECTED]> > Send administrative queries to <[EMAIL PROTECTED]> -- http://dl0ger-eme.dd8il.de/ "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail # This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
[linrad] Re: Increased CPU usage
Hello Daniel, I tried the parameters that you sent. (without fft2) These are the results: Pentium IV at 2.66 GHz, Debian Etch, Linrad-02-28: 4% Pentium IV at 2.66 GHz, Debian Etch, Linrad-02.21: 5% Pentium III at 800 MHz, Suse 9.1, Linrad-02.28: 7% Pentium III at 800 MHz, Suse 9.1, Linrad-02.21: 18% This is in terminal mode with svgalib. Under X11 the load is similar on the Pentium IV but it is about 16% on the Pentium III for both Linrad-02.21 and 02-28. Linrad-02-28 should be identical to 02-27 when it comes to timings. The differences are in the calibration routines only. The differences I see between the latest and earlier versions go in the opposite direction to what you observe. The difference (by a factor of about 2.5) is very large and shows that I corrected some error. Presumably I did not do it right since you observe a change in the opposite direction. Are you running with svgalib or under X11? If X11, what is the screen size and colour depth that you use? 73 Leif > Hello Leif, > > there seems to be significant increase from 02.23 to 02.27 regarding the CPU > usage. > > On my system (AMD Duron 1,3 GHz, 512Mb RAM) I see the following figures: > > Linux (Suse 9.1): > > 02.19 (02.23 is the same) > FFT2 off: 19% > FFT2 on: 37% > > > 02.27 > FFT2 off: 36% > FFT2 on: 53% > [EMAIL PROTECTED] > > > Win2K: > wlr 02.27 > > FFT2 off: 22% > FFT2 on: 37% > > > This is with the same parameter files for all versions. It doesn't bother me > much, just curious to know why. > > On ON5GN's system there is not much of an increase but Pierre is using modern > hardware. > > > 73 > > Daniel, DL3IAE > > -- > http://dl0ger-eme.dd8il.de/ > > "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... > Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail > > # > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> > To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> > Send administrative queries to <[EMAIL PROTECTED]> > # This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
[linrad] Re: Increased CPU usage
Hello Daniel, Thanks for the info. Please send the parameter files you used for this test. I think the increased time is because of a bug of some kind. I have not noticed this problem but I will look at it in due time. At the moment I am working with the calibration routines which do not work properly at the moment. There are so many different situations and it seems that changes I made recently go wrong now and then 73 Leif > Hello Leif, > > there seems to be significant increase from 02.23 to 02.27 regarding the CPU > usage. > > On my system (AMD Duron 1,3 GHz, 512Mb RAM) I see the following figures: > > Linux (Suse 9.1): > > 02.19 (02.23 is the same) > FFT2 off: 19% > FFT2 on: 37% > > > 02.27 > FFT2 off: 36% > FFT2 on: 53% > [EMAIL PROTECTED] > > > Win2K: > wlr 02.27 > > FFT2 off: 22% > FFT2 on: 37% > > > This is with the same parameter files for all versions. It doesn't bother me > much, just curious to know why. > > On ON5GN's system there is not much of an increase but Pierre is using modern > hardware. > > > 73 > > Daniel, DL3IAE > > -- > http://dl0ger-eme.dd8il.de/ > > "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... > Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail > > # > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> > To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> > Send administrative queries to <[EMAIL PROTECTED]> > # This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
