similar to: Questions about 1000HZ Kernel

Hi, I have some servers that are dedicated to do meetme conferencing. From some previous test i concluded that I need to use dahdi_dummy as it is more accurate. If I did use the core timers in dahdi (not loading dahdi_dummy) I got bad quality in the conferences and dahdi_test showed 99.6% as worst. I thought maybe the issue as bad hardware for the timing or something else. But today I

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

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.

Anybody sucessfully got stable 1000Hz clock without Digium harware and kernel 2.6? We need to consult some peoples how to clock asterisk stable with exactly 1000 Hz without much kernel/drives patching/tweaking. Some test results we made so far: 2.6 with digium card - stable 1000 Hz. 2.6 with ztdummy - uses RTC and the clock is 1024, not 1000. 2.6 with some Realtime kernel patch - provides stable

I''m running Xen on a dual xeon system at the moment and somehow the results are a bit less than what i expected. I’ve started to do some monitoring on it to see how bad it is. you can see for yourself on: http://core.zokahn.com/cs-01/ I''ve installed Xen 2.0 using the howto in howtoforge: http://www.howtoforge.com/perfect_xen_setup_debian_ubuntu This virtual machine is running 2

> > Having HZ differ between Xen and a guest doesn''t really matter that > much. The guest will get fewer upcalls than it expects, but it will > count ten ticks for each upcall. So I doubt that thsi is your problem. > Does ztdummy use the rtc driver? I''m not sure how weel we support that > on Xen... The problem is that the ztdummy driver assumes 1000HZ, and a

Currently, if you are running CentOS-4.x on a Vmware box you end up with time skew problems. The main fix has been using a set of recompiled kernel that has a HZ that is more fitting with what Vmware expects (eg 100 hz). The 4.7 kernels look like they will not need this: http://jons-thoughts.blogspot.com/2008/04/rhel-and-vmware-time-skew-problems.html Well, I've gotten quite the number of

Hi all :) I''ve tested this and having a cpufreq that slows down the CPU affects the rate of HTB. My ondemand cpufreq governor scales down the CPU frequency about 40% and this is more or less the slowdown the rate suffers, 40%. Any known way of dealing with this without having to disable cpufreq? Thanks in advance :) Ra?l N??ez de Arenas Coronado -- Linux Registered

First, thanks to Kevin for the quick response to the 'minor' problem that zaptel had with 2.6.13 kernels. Interestingly in the kernel config you can now change the timer frequency. According to the help messages 100 HZ is a typical choice for servers, SMP and NUMA systems with lots of processors that may show reduced performance if too many timer interrupts are occurring. 250 HZ is a

This has only cosmetic change from mainline. -#define CLOCKS_PER_SEC (USER_HZ) /* like times() */ +# define CLOCKS_PER_SEC (USER_HZ) /* like times() */ Signed-off-by: Chris Wright <chrisw@sous-sol.org> --- diff -r 754079886035 linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/param.h --- a/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/param.h Thu Feb 9 20:25:33

Hi, On 64 bit centos 5.6 I have virtualbox 4 and 64 bit elastix latest. Since yesterday cpu utilization has been constantly peaking 65-75%. Hardly 1-2 concurrent calls. No other activity on server. Top shows asterisk on top. Its quad xeon server with 4 gb ram. Any suggestion where should I start and how should I go about with my investigation. Thank you and have a great weekend. Sans

Hi, My solaris storage hangs. I login to the console and there is messages[1] display on the console. I can''t login into the console and seems the IO is totally blocked. The system is solaris 10u8 on Dell R710 with disk array Dell MD3000. 2 HBA cable connect the server and MD3000. The symptom is random. It is very appreciated if any one can help me out. Regards, Ding [1] Aug 16

Hi everybody, my goal is to display symbols on the x-axis of a barplot. I read some mathematics strings in a file and convert them to an expression as follows: tt<- scan(file = fstr ,'what' ='character', sep = ""); for (iaa in 1:length(tt)) { tt[iaa]<-do.call(expression, lapply(tt[iaa], as.name)); } I obtained the following result: tt =

Hi there, I am getting very low throughput (around 0.29Mbps) while running netperf benchmark for guest to guest communication on a single physical host. To analyse where the time is spent in hypervisor I wanna use profiling. Please help me choosing good profiler according to my requirments. Should it be better in my case, Xentrace, gprof, xenoprof  or Oprofile. Is it possible to use some vtune

Hi there, I am getting very low throughput (around 0.29Mbps) while running netperf benchmark for guest to guest communication on a single physical host. To analyse where the time is spent in hypervisor I wanna use profiling. Please help me choosing good profiler according to my requirments. Should it be better in my case, Xentrace, gprof, xenoprof  or Oprofile. Is it possible to use some vtune

Hi I was reading this article on installing asterisk 1.6 + debian http://www.howtoforge.com/installing-and-configuring-asterisk-1.6-and-postgresql-to-manage-cdr-and-realtime-config-on-debian and I noticed they suggested to recompile to 1000Hz enable kernel, I currently have a 250Hz stock standard kernel. I am running on a soekris board - amd geode cpu. Is recompiling the kernel to the

I''m just-so-fresh to the list, so hello everyone. I''m having a realy hard time with setting up very simple bandwidth management. What I am trying to do is setup a 10Mbit interface to send at only 1920kbit to most of the network (to make sure it hardly ever tops 2mbit). I did succeed with the ingress traffic... With egress however, I get very odd results at different speeds. With

Ilia Mirkin <imirkin at alum.mit.edu> writes: > On Wed, Feb 6, 2019 at 3:28 PM Dan Espen <dan1espen at gmail.com> wrote: >> >> Ilia Mirkin <imirkin at alum.mit.edu> writes: >> >> > It would be useful to know how the screen is connected. Also please >> > grab the monitor's EDID from /sys/class/drm/cardN-connector/edid and >> >

I thought - what about the software - maybe it needs updated. After doing so I get a list: Audio codecs PCMU (8000 Hz) PCMA (8000 Hz) opus (48000 Hz) L16/16000 (16000 Hz) G.726-32 (8000 Hz) L16/8000 (8000 Hz) speex/16000 (16000 Hz) speex/8000 (8000 Hz) -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi all, Typically I dont have issues with configuring X. However this time its an issue. I have an NVIDIA graphics card trying to do 1920x1080. If I configure the screen by hand with the nvidia config utility it works at 1920x1080. However when I reboot its 800x600. When I use the nvidia config utility to set 1920x1080 then save the xorg.conf file, and reboot (yes I copied /tmp/xorg.conf to