search for: 100hz

Ok here is a real geek question, I building my own linux kernel for my asterisk system and came across the kernel setting for the timer frequency. I have one of 3 hardcode choices 100Hz, 250 Hz and 1000Hz. From what I understand the default Freq was changed from 100Hz in kernel 2.4 to 1000Hz (1KHz) in kernel 2.6. Timing is a BIG issue in asterisk with all the TDM and zap channel stuff. My guess is to go with the lower 100 or 250 Hz option but that is only a guess. The 1KHz...

Dear Yagi-san, > I heard from the horse's mouth that the CentOS team is working on the > 100Hz centosplus kernel. I think your request triggered the action :-) > They want make people happy. That sounds nice! This TIPS, CONFIG_HZ=100, is one of FAQs. It will make most of us happy. Now we can get kernel-vm package on dev.centos.org. Is it a test release of the special kernel? I installed...

Hi all! I would like to use Ogg-Vorbis to encode a non audio waveform. My waveform is in .wav format, on 16 bit mono, with frequency range from 100Hz to 100MHz. It's about 100MB lenght. I need to compact it with lossy for net transfer. Is there something like this, already done, that can help me ?? How can I measure the distortion that Vorbis introduce? I'm sorry for my bad english. Thanks, Melvi

...raise questions in my mind and I wonder if anyone has any opinions/comments on which settings are most suitable for use with asterisk: SLAB Allocator (SLAB or SLUB?) Tickless System (?) Preemption model (?) IO Scheduler (Anticipatory, Deadline or CFQ?) Flat or Sparse Memory (?) Timer Frequency (100Hz .. 1000hz) Cheers Alan -- The way out is open! http://www.theopensourcerer.com

...ADME [2] this isn't necessary as of CentOS 5.3 and therefore these packages are not maintained anymore (the latest released kernel-vm is 2.6.18-92.1.22). >From what I understand, as of CentOS 5.3 it is possible to use the "divider=10 clocksource=acpi_pm" to reduce the frequency to 100Hz. I tried this setting, and it made no difference at all. I also tried to install the VirtualBox guest extensions, and still, the host CPU never goes below 50%. Is there any way to solve this issue without resorting to a custom kernel build? Thanks, Sagi [1] http://people.centos.org/tru/kernel-vm...

...clock rate change request 1043 -> 83 /dev/vmmon[21623]: host clock rate change request 83 -> 1043 /dev/vmmon[21623]: host clock rate change request 1043 -> 83 all the time. I found on centos wiki information ,about vmware kernel running inside linux virtual machines to change frequency to 100hz. Is there any workaround for this issue? Thanks! David -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20080421/b71c3ef7/attachment-0001.html>

I'm running VMware Server 1.0.6 on a CentOS 5.2 host and am having some clock difficulties. Host OS is x86_64 running on 1.9 GHz AMD Sempron, nVidia chipset. Guest OS's are 32-bit FreeBSD (clock works fine after disabling ACPI, setting the clock source to the PIT, and running the guest tools), WinXP (unknown clock status), and i686 CentOS 5.2 (here is the problem). I've tried pretty

Hey All, I've been working on trying to get asterisk to play nice under Xen and I've run into a bit of a road block. I'm not using any hardware stuff only ztdummy. First I had issues getting ztdummy to work but that was solved by recompiling the xenU kernel to have CONFIG_CRC_CCITT=y which it was missing. Now ztdummy is seen fine in the virtual machine though when I run

...f ASIO driver? Why "it was of no practical use"? > I worked some time for a company doing AEC using Speex on Windows.It is true it depends a lot on sound card models. I remember I could do AEC by resampling frequencies so play and record frequencies where equal.Frequencies where aprox 100Hz appart.Also, I know that on other cases AEC was achieved by disabling FX DirectSound effects where it wasn`t possible before that.Try to disable all you don't need before calling Speex AEC function. > Also, I tried the ASIO driver,as an experiment. I think it worked, but it was of no practic...

Hi! Can anybody explain how Xen deals with time? On traditional, non-virtualized systems I run an ntpd on every system to keep the time accurate. But what to do on xenified systems? Do all the domU''s get the time from dom0 meaning it is sufficient to run an ntpd there or do I have it to setup in every domU? Thanks for your help! Kind regards, Stephan

...problems in RHEL4 and VMWare, so figured that I would write this. In RHEL4.7, there will be a kernel feature that allows you to pass 'divider=' on the command line in grub. The number must be a divisor of 1000, and the most common value is 10 (yielding an effective timer interrupt rate of 100Hz). I'm expecting the 4.7 beta to become available Real Soon Now(TM), though I have no information as to when that will occur. In the meantime, this change is available as a hotfix from Red Hat's Global Support Services. What this does is take the kernel tick rate (which defaults to 1000Hz)...

...0, 1080, 1126, 1136, 1250, 0, > DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC | > DRM_MODE_FLAG_INTERLACE), > - .vrefresh = 50, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, > }, > + .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, > /* 40 - 1920x1080i at 100Hz 16:9 */ > { DRM_MODE("1920x1080i", DRM_MODE_TYPE_DRIVER, 148500, 1920, 2448, > 2492, 2640, 0, 1080, 1084, 1094, 1125, 0, > DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | > DRM_MODE_FLAG_INTERLACE), > - .vrefresh = 100, .picture_aspect_ratio = HDMI_PICTU...

..., 1920, 1952, 2120, 2304, 0, 1080, 1126, 1136, 1250, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_INTERLACE), - .vrefresh = 50, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, + .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, /* 40 - 1920x1080i at 100Hz 16:9 */ { DRM_MODE("1920x1080i", DRM_MODE_TYPE_DRIVER, 148500, 1920, 2448, 2492, 2640, 0, 1080, 1084, 1094, 1125, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE), - .vrefresh = 100, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, + .p...

..., 1920, 1952, 2120, 2304, 0, 1080, 1126, 1136, 1250, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_INTERLACE), - .vrefresh = 50, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, + .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, /* 40 - 1920x1080i at 100Hz 16:9 */ { DRM_MODE("1920x1080i", DRM_MODE_TYPE_DRIVER, 148500, 1920, 2448, 2492, 2640, 0, 1080, 1084, 1094, 1125, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE), - .vrefresh = 100, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, + .p...

Don't know if anybody is still missing the lame oggenc features for resampling, lowpass/highpass filters etc, but I wrote a little script that uses sox to do all the stuff I need to real-time encode oggenc from the radio, or any input device. #!/bin/bash DATE=`date '+%m-%d-%Y-(%H.%M)'` DESTIN=/video/music/perftoday export DATE=$DATE'-PerformanceToday.ogg' sox -V -r 44100 -c

...IO driver? Why "it was of no practical use"? >> I worked some time for a company doing AEC using Speex on Windows.It is true it depends a lot on sound card models. I remember I could do AEC by resampling frequencies so play and record frequencies where equal.Frequencies where aprox 100Hz appart.Also, I know that on other cases AEC was achieved by disabling FX DirectSound effects where it wasn`t possible before that.Try to disable all you don't need before calling Speex AEC function. >> Also, I tried the ASIO driver,as an experiment. I think it worked, but it was of no pra...

Hello. I am hoping someone can help with a problem I am having. I am running the Windows folding at home client through wine. This app is very load intensive and performs many scientific calculations. It consumes 100% of all six cores in my system. However, I run it with a "nice" level of 19 so that it only uses idle cycles. Unfortunately, with this setup, my system consistently

...r? Why "it was of no practical use"? > >>> I worked some time for a company doing AEC using Speex on Windows.It is true it depends a lot on sound card models. I remember I could do AEC by resampling frequencies so play and record frequencies where equal.Frequencies where aprox 100Hz appart.Also, I know that on other cases AEC was achieved by disabling FX DirectSound effects where it wasn`t possible before that.Try to disable all you don't need before calling Speex AEC function. >>> Also, I tried the ASIO driver,as an experiment. I think it worked, but it was of no...

Hi everyone: Just a follow up on the fast clock issue: "Can you double-check that 'cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq' outputs the same number as your 'cpuKHZ' setting in your config.ini file?" There is no cpufreq directory under /sys/devices/system/cpu/cpu0; all I see is "cache" (dir), "crash_notes" (a file) and

...ile. By harmonically transposing frequencies from 6 to 10Khz with one octave, and overlaying the original file with that stream, one can create the perception that an additional stream of 12-20Khz has been encoded. This effect is extremely usefull since altered (or artificial) frequencies below 100Hz and above 6Khz are enormously hard to hear! Especially in speech! In music this would translate to that the cymbals of all songs or drums sound about the same, and one can clearly pick the original recording from the compressed one. But for voice this is hardly noticable since very few articulat...