similar to: IDMAP cache creating tons of mulex spins

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

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

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

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:

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

>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

Hi, I have a mysql instance which if I point more load towards it it suddenly gets 100% in SYS as shown below. It can work fine for an hour but eventually it gets to a jump from 5-15% of CPU utilization to 100% in SYS as show in mpstat output below: # prtdiag | head System Configuration: SUN MICROSYSTEMS SUN FIRE X4170 SERVER BIOS Configuration: American Megatrends Inc. 07060215

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

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:

Hello, Sorry for the (very) long subject but I''ve pinpointed the problem to this exact situation. I know about the other threads related to hangs, but in my case there was no < zfs destroy > involved, nor any compression or deduplication. To make a long story short, when - a disk contains 2 partitions (p1=32GB, p2=1800 GB) and - p1 is used as part of a zfs mirror of rpool

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

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

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

I figured the following ZFS ''success story'' may interest some readers here. I was interested to see how much sequential read/write performance it would be possible to obtain from ZFS running on commodity hardware with modern features such as PCI-E busses, SATA disks, well-designed SATA controllers (AHCI, SiI3132/SiI3124). So I made this experiment of building a fileserver by

PV-GRUB is really awesome, however I noticed that it spins at 100% cpu, even while just sitting at its prompt. Just a heads-up... Thanks, -Chris _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

http://buildlogs.centos.org/monthly/7/ A very useful resource. Updates takes less time after install. Just curious if there are torrents for them? I could commit to running a single seed for the x86_64 "everything" ISO. I dd them onto USB sticks for people (personally recommend the 16GB Mushkin Atom - even when installing from USB2 the media verification is faster than any other

Hello gluster-verse! I'm about to see if GlusterFS can handle a large amount of clients, this was not at all in plans when we initially selected and setup our current configuration. What sort of experience do you (the collective "you" as in y'all) have with a large client to storage brick server ratio? (~1330:1) Where do you see things going awnry? Most of this will be reads

Greetings everybody! I started looking more thoroughly at gnome-window-decorator.c and now my head spins and "hurts" and believe that I'm not going to achieve anything serious in terms of tweakable shadows anytime soon. It's far more difficult than I expected. While I (believe) to understand now the shadows are drawn, I currently don't get why there are 12 shadow-quads and

I'm running up-to-date CentOS 5 w/ Xen. I'm getting tons (tons = 13787 just yesterday, presumably because I have a monitoring system poll every 5 minutes) of log entries of the following: netsnmp_assert index == tmp failed if-mib/data_access/interface.c:467 _access_interface_entry_save_name() and netsnmp_assert rc == 0 failed if-mib/ifTable/ifTable_data_access.c:209