search for: config_hz

Hello, The XEN kernel in "XEN RELEASE-4.0.1" is shipped with the following config parameters: CONFIG_HZ_1000=y CONFIG_HZ=1000 At many blogs and forums there is a discussion that the CONFIG_HZ parameter should be changed to 250 HZ or 300 HZ. We will operate a DomU and the Dom0 with the same 1000HZ Kernel. Is this setup possible and recommended. How high is the performance cut-off? Which option is m...

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 the kernel-vm. Its change-log shows HZ=100. And the kernel seems better for clock interval on VMWare. Thanks a lot. Yuji

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

Hi, I have a server and ten clients in a Gigabit network. The server has 125mbps network bandwidth. I want that the server has 40Mbps bandwidth reserved for client 1 (IP 192.168.5.141), and the rest bandwidth is for all other clients. My script looks like this (I use IFB for incoming traffic): #!/bin/bash export TC="/sbin/tc" $TC qdisc add dev ifb0 root handle 1: htb default 30

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

...th 2.6.10-1.771_FC2smp and stopped working when I upgraded to 2.6.16-1.2069_FC4smp. These are fedora kernels and the network controller is an Intel Gbit (e1000) running a 100 Mbps Full Duplex. Don''t know how or if this matters but the 2.6.10 kernel has CONFIG_X86_HZ=1000 and the 2.6.16 has CONFIG_HZ=250 The idea is to just shape to , say 2Mbit, a certain kind of traffic everything else should goes unshaped. # tc qdisc add dev eth0 root handle 1: htb default 20 # tc class add dev eth0 parent 1: classid 1:2 htb rate 2Mbit # tc qdisc add dev eth0 parent 1:2 sfq perturb 10 # tc filter add dev et...

...roblems before I did that when the box was in a private LAN) The server details are: (serenity:~) # uname -a89zx Linux serenity 2.6.18-gentoo-r4 #1 SMP Mon Jan 15 12:33:56 CET 2007 x86_64 Intel(R) Pentium(R) D CPU 3.00GHz GenuineIntel GNU/Linux (this is genkernel generated) (serenity:~) # grep -i config_hz /etc/kernels/kernel-config-x86_64-2.6.18-gentoo-r4 # CONFIG_HZ_100 is not set CONFIG_HZ_250=y # CONFIG_HZ_1000 is not set CONFIG_HZ=250 (serenity:~) # lspci | grep -i ether 05:04.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5714 Gigabit Ethernet (rev a3) 05:04.1 Ethernet controller: Br...

Hi! I need to have a modified entry for CONFIG_HZ in the Dom-U kernel. I installed Lenny, then installed the xen-enabled kernel linux-image-2.6.26-1-xen-686 and also the sources (apt-get source linux-image-2.6.26-1-xen-686). However, there is no .config file in this package. So make menuconfig starts with the default values. However, when I compil...

...am.h --- a/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/param.h Thu Feb 9 20:25:33 2006 +0100 +++ /dev/null Thu Jan 1 00:00:00 1970 +0000 @@ -1,23 +0,0 @@ -#ifndef _ASMx86_64_PARAM_H -#define _ASMx86_64_PARAM_H - -#ifdef __KERNEL__ -# include <linux/config.h> -# define HZ CONFIG_HZ /* Internal kernel timer frequency */ -# define USER_HZ 100 /* .. some user interfaces are in "ticks */ -# define CLOCKS_PER_SEC (USER_HZ) /* like times() */ -#endif - -#ifndef HZ -#define HZ 100 -#endif - -#define EXEC_PAGESIZE 4096 - -#ifndef NOGROUP -#define NOGROUP (-1) -#endif -...

Hi , I am using Centos 5 for virtualization , i have installed Centos 5 as Host OS and trying install Centos 5 as a guest OS but system is stuck at final screen Starting Install process. This may take saveral minutes...... and its not doing anything else after that i am waiting for at leat 30-40 minutes. Kernel and Hardware details are as follows: Kernel Linux xen 2.6.18-8.el5xen #1 SMP

...9060588 3458809975 0 0 0 0 0 0 eth0:2125601276 3324729816 3604 3441 3441 92 0 1347070 896165072 3458818569 0 0 0 0 0 0 2113352907-2107451373=5901534 (traffic on intefece about 40Mbit/s = 5MB/s) - seems good. Both routers have CONFIG_HZ=1000, two cpus, and bofh are using e1000/e100 driver with enabled NAPI. Besides I''ve similar thing on laptop, 2.6.14 , Broadcom BCM4401-B0 nic (b44) :) Why interface counters are increasing so slowy? this behavior can be changed? or in other way this is normal behavior or some bug , fea...

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

...Y_PRESENT=y CONFIG_SPARSEMEM_EXTREME=y CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y CONFIG_PAGEFLAGS_EXTENDED=y CONFIG_SPLIT_PTLOCK_CPUS=4 CONFIG_PHYS_ADDR_T_64BIT=y CONFIG_ZONE_DMA_FLAG=1 CONFIG_BOUNCE=y CONFIG_VIRT_TO_BUS=y CONFIG_HAVE_MLOCK=y CONFIG_HAVE_MLOCKED_PAGE_BIT=y CONFIG_DEFAULT_MMAP_MIN_ADDR=4096 CONFIG_HZ_250=y CONFIG_HZ=250 CONFIG_PHYSICAL_START=0x1000000 CONFIG_PHYSICAL_ALIGN=0x1000000 CONFIG_CMDLINE_BOOL=y CONFIG_CMDLINE="" CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y CONFIG_ISA_DMA_API=y CONFIG_BINFMT_ELF=y CONFIG_NET=y CONFIG_UNIX=y CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_...

...y, but usually it's easiest not to. + + You will need to configure your kernel with the following options: CONFIG_HIGHMEM64G=n ("High Memory Support" "64GB")[1] CONFIG_TUN=y/m ("Universal TUN/TAP device driver support") @@ -35,7 +38,8 @@ Running Lguest: CONFIG_HZ=100 ("Timer frequency")[2] - A tool called "lguest" is available in this directory: type "make" - to build it. + to build it. If you didn't build your kernel in-tree, use "make + O=<builddir>". - Create or find a root disk image. There ar...

...MENTAL=y ("Prompt for development and/or incomplete code/drivers") CONFIG_PARAVIRT=y ("Paravirtualization support (EXPERIMENTAL)") CONFIG_LGUEST=y/m ("Linux hypervisor example code") + CONFIG_BLOCK=y ("Enable the block layer") and I recommend: CONFIG_HZ=100 ("Timer frequency")[2] diff --git a/drivers/lguest/Kconfig b/drivers/lguest/Kconfig index 43d901f..4bc0577 100644 --- a/drivers/lguest/Kconfig +++ b/drivers/lguest/Kconfig @@ -1,6 +1,6 @@ config LGUEST tristate "Linux hypervisor example code" - depends on X86 && P...

...y, but usually it's easiest not to. + + You will need to configure your kernel with the following options: CONFIG_HIGHMEM64G=n ("High Memory Support" "64GB")[1] CONFIG_TUN=y/m ("Universal TUN/TAP device driver support") @@ -35,7 +38,8 @@ Running Lguest: CONFIG_HZ=100 ("Timer frequency")[2] - A tool called "lguest" is available in this directory: type "make" - to build it. + to build it. If you didn't build your kernel in-tree, use "make + O=<builddir>". - Create or find a root disk image. There ar...

...MENTAL=y ("Prompt for development and/or incomplete code/drivers") CONFIG_PARAVIRT=y ("Paravirtualization support (EXPERIMENTAL)") CONFIG_LGUEST=y/m ("Linux hypervisor example code") + CONFIG_BLOCK=y ("Enable the block layer") and I recommend: CONFIG_HZ=100 ("Timer frequency")[2] diff --git a/drivers/lguest/Kconfig b/drivers/lguest/Kconfig index 43d901f..4bc0577 100644 --- a/drivers/lguest/Kconfig +++ b/drivers/lguest/Kconfig @@ -1,6 +1,6 @@ config LGUEST tristate "Linux hypervisor example code" - depends on X86 && P...

The following patches are the latest update of the TSC and hrtimer patches I posted on 29/03. Rusty's original TSC patch has been resynced to the latest lguest repo, as has the hrtimer patch, which also incorporates feedback from Jeremy & Rusty: - Change clock event hrtimer to absolute time. 'now' is captured in the host during the hypercall. - Propagate -ETIME back to the

The following patches are the latest update of the TSC and hrtimer patches I posted on 29/03. Rusty's original TSC patch has been resynced to the latest lguest repo, as has the hrtimer patch, which also incorporates feedback from Jeremy & Rusty: - Change clock event hrtimer to absolute time. 'now' is captured in the host during the hypercall. - Propagate -ETIME back to the

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I''m trying to diagnose a reasonably large performance drop between two ostensibly similar servers; one running CentOS 5.5 on bare metal, the other running Fedora 14 as a Xen DomU under CentOS 5.5 (Xen 3.1.2-194.26.1.el5) I have a pair of older Dell PowerEdge 1750 servers, each with 4GB ram and 2x 2.4GHz Xeon CPU''s with