similar to: sem: negative parameter variances

We have a serious performance problem on our server. Here is some data: <pre> > ::memstat Page Summary Pages MB %Tot ------------ ---------------- ---------------- ---- Kernel 1133252 4426 31% Anon 1956988 7644 53% Exec and libs 31104 121 1% Page cache

Does anyone has any ideas about this problem? 2008/1/15, ?? TaoJie <eulertao at gmail.com>: > > Hi all: > > I''m working on revealing system performance now. > My testing program is an infinite loop. Inside the loop, it will do some > mathematical opertaions and call function callee(), then go to the next > loop. > I install a alarm(30) in the program. It

HI, T5220, S10U4 + patches mdb -k > ::memstat While above is working (takes some time, ideally ::memstat -n 4 to use 4 threads could be useful) mpstat 1 shows: CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl 48 0 0 1922112 9 0 0 8 0 0 0 15254 6 94 0 0 So about 2mln xcalls per second. Let''s check with dtrace:

In this thread: http://syslinux.zytor.com/archives/2007-February/008014.html I reported that IBM Opteron servers with Broadcom BCM5780 chipsets would freeze randomly in the PXE menus from the SYSLINUX 3.35 tools vesamenu.c32 and menu.c32. There did not seem to be any reason for this nor systematics in when the servers would lock up. The solution is now available: Upgrade your IBM servers to

I''m looking for a suggestion on a good way to hunt down the source of high context switching and mutex contentions... Is dtrace the way to go now, or should I stick with something like lockstat? Russ This is a 5 second interval for mpstat: CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl 16 0 0 1115 1241 206 9095 912 2420 7393 0 12105 68 25

In crossbow, each mac_srs has a kernel thread called "mac_rx_srs_poll_ring" to poll the hardware and crossbow will wakeup this thread to poll packets from the hardware automatically. Does crossbow provide any method to disable the polling mechanism, for example disabling the this kernel thread? Thanks Zhihui -------------- next part -------------- An HTML attachment was scrubbed... URL:

I have been using PXELINUX for a while and appreciate all you guys are doing! I have a couple of questions re PXELINUX: 1. I am experiencing problems with the LOCALBOOT statement on an IBM x3650. IBM mentions the following: http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5084755 I am using PXELINUX 4.04. Is this problem still attributed to some bug in PXELINUX? Right now I

Hi. I would appreciate your advice about these TWO PROBLEMS: ======================================================= Find the simplest way to A) configure a Dovecot 2.2.10 IMAP server to access (existing) email users' (mbox-format) mail folders ****in read-only mode.**** B) Do the above while allowing a master_user to access mail on behalf of real users. (I've got master_user access

Hi I am having difficulty getting the right format for a lattice plot I am trying to produce. Here is a pic of the plot as I get it now http://i235.photobucket.com/albums/ee37/scotrivers/lattice_plot01.jpg and here is the code I am using: RN<-read.csv("N:/data.dat",header=T) DATA<-RN[is.element(RN$age,0:3),] #select data on age

Hi. I would appreciate your advice about this PROBLEM: ======================================================= Find the simplest way to configure a Dovecot 2.2.10 IMAP server to access existing email users' (mbox-format) mail folders via a master_user ****in read-only mode.**** (I've got the master_user access working.) Simplest because while I'm proficient at UNIX systems

Dear *, I have to perform an ANOVA analysis to study the effects on the performance of some algorithmic components in the design of my algorithm. I have done a full factorial design for the following 5 factors (my response variable is "best"): $ model :'data.frame': 3360 obs. of 6 variables: ..$ best : num [1:3360] 0.108 0.573 0.625 1.057 0.451 ...

Recently I found that the mac_srs_rx_poll_ring thread may never stop in kernel, please see the following mpstat, cpu 2 is in 100% kernel usage, but no syscalls and no interrupts. CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl 0 0 0 0 300 100 0 0 1 0 0 0 0 0 0 100 1 14 0 0 134 68 134 1

Hi. T2000 1.2GHz 8-core, 32GB RAM, S10U3, zil_disable=1. Command ''zpool export f3-2'' is hung for 30 minutes now and still is going. Nothing else is running on the server. I can see one CPU being 100% in SYS like: bash-3.00# mpstat 1 [...] CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl 0 0 0 67 220 110 20 0 0 0 0

>From time to time a jboss process would end eating all, the available CPU and the load avg would skyrocket. Once the operators restarted jboss, the system''d be normal again (sometimes for weeks) until the next incident Since we moved the app from a v440 running Solaris 10 8/07 to a t2000 running Solaris 10 5/08 the problem started to happen more frequently (2-3 times a week). The

Dtrace and Performance Teams, I have the following IO Performance Specific Questions (and I''m already savy with the lockstat and pre-dtrace utilities for performance analysis.. but in need of details regarding specifying IO bottlenecks @ the controller or IO bus..) : **Q.A*> Determining IO Saturation bottlenecks ( */.. beyond service times and kernel contention.. )/ I''m

I just had a quick play with gzip compression on a filesystem and the result was the machine grinding to a halt while copying some large (.wav) files to it from another filesystem in the same pool. The system became very unresponsive, taking several seconds to echo keystrokes. The box is a maxed out AMD QuadFX, so it should have plenty of grunt for this. Comments? Ian

So I have this dual 16-core Opteron Dell R715 with 128G of RAM attached to a SuperMicro disk enclosure with 45 2TB Toshiba SAS drives (via two LSI 9200 controllers and MPxIO) running OpenIndiana 151a4 and I''m occasionally seeing a storm of xcalls on one of the 32 VCPUs (>100000 xcalls a second). The machine is pretty much idle, only receiving a bunch of multicast video streams and

Hello ZFS, System was rebooted and after reboot server again System is snv_39, SPARC, T2000 bash-3.00# ptree 7 /lib/svc/bin/svc.startd -s 163 /sbin/sh /lib/svc/method/fs-local 254 /usr/sbin/zfs mount -a [...] bash-3.00# zfs list|wc -l 46 Using df I can see most file systems are already mounted. > ::ps!grep zfs R 254 163 7 7 0 0x4a004000

--> Requote: Trying to install Centos 4.3 on IBM eseries with Adaptec 9405 SAS. Fail to install / recognized SAS. Download from IBM RHE4 driver unfortunately did not help. Then I install RHEL 4 / SLES 9 - Running fine. SAS was installed and recognized. Anybody have any idea? -- ----------- ( ) ?( (.) (.) )? ---o000o-(_)-o000o--- Mahayudin Mohd Hashim

Good morning, We have been noticing troubles browsing on a ZFS share, especially in the afternoon, and found our 8 cores going at 100% with over 100000 smtx running on each core on mpstat. We are running Solaris 5.11 with Samba 3.5.10, 48 GB of RAM and two 4 core Xeons. The fileserver is attached by domain mode to Windows 2003 R2 SP2 with Services for Unix installed and we only have around 80