similar to: Re: filter performance/optimization questions (Imre Gergely)

Hi ZFSers, I''ve been working on merging the Joyent arcstat enhancements with some of my own and am now to the point where it is time to broaden the requirements gathering. The result is to be merged into the illumos tree. arcstat is a perl script to show the value of ARC kstats as they change over time. This is similar to the ideas behind mpstat, iostat, vmstat, and friends. The current

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

We started seeing odd behaviour with clients somehow hammering our ZFS-based NFS server. Nothing is obvious from mpstat/iostat/etc. I''ve seen mention before of NFSv3 client dtrace scripts, and I was wondering if there ever was one for the server end, displaying top talkers, writes/reads, or locations of such to nail down abusive clients short of using snoop/tcpdump to nail down via

Hello, We are doing digital recording over a 100 Mb/s switched network to a dedicated Samba NAS-Filer and need to optimize our workflow and present some performance data. I just want to be sure, to not overlook some important aspect in my experimental setup. Let me explain in short what is our infrastructure: The Swiss Library for the Blind has started producing Digital Talking Books (see

Hello Yes i have separate class for every user, every class have pfifp qdisc. User direction shaping: tc -s -d qdisc show dev eth2 | grep pfifo |wc -l 3959 Internet direction shaping: tc -s -d qdisc show dev vlan0891 | grep pfifo |wc -l 3959 Nat: iptables -L -n -v -t nat | grep SNAT | wc -l 3959 For shaping i use hfsc classifier. Date: Fri, 15 Jul 2005 14:16:33 +0200 From: Peter Surda

With kernel 2.6.13.4 linux bridge with traffic management for 4000users and 20.4 MB/s(tx)/22.4 MB/s(rx) data load of CPU is max 50% With kernel 2.6.15.1 the same linux bridge with the same traffic has 100% CPU load and in top I have ksoftirqd proccess. The machine is P4 3.2 GHz with 1GB of ram and 4 NetGear 620 cards The config is: /sbin/modprobe acenic link=0x0100,0x0100,0x0100,0x0100

Steve Frampton [mailto:frampton@j-com.co.jp] of your address change Content-Length: 7142 samba@samba.org David Barroso <h4371719@alumnes.eup.udl.es> Jeremy Allison <jeremy@valinux.com> "Tulipant Gergely" <tulipant-gergely@dbrt.hu> Edwards Philip M Contr AFRL/SNRR <Philip.Edwards@wpafb.af.mil> Drenning Bruce <bdrenni@catholicrelief.org> Glenn

Hi all, Is anyone using oprofile? I'm getting segfaults from opreport at the moment, and I'm not sure if it is opreport, or just me. In case it is something just plain daft I am doing, here is how it goes: opcontrol --reset opcontrol --setup --no-vmlinux opcontrol --start ... now I run my program, /tmp/myprog ... opcontrol --dump opcontrol --shutdown then I run, opreport -l

Nicholas Thierry-Mieg, Thank you for your reply on Saturday Apr 23,2011. Since then I have been trying to learn how to use oprofile 0.9.4 on Centos Linux 5.5. If I follow the following steps running as root, opcontrol --shutdown opcontrol --callgraph=7 opcontrol --image=/home/frankc/DQTTest5/MatchUpTest/lirh5g_deb/Mary48.exe opcontrol --start

hi i''m using htb + u32 filters, and i was wondering if there is something one can optimize at this stage. i have a lot of filters (~ 50.000 / interface, and there are two interfaces), and around 4500 classes / interface. the traffic going through this machine is something around 210-230mbit/s at 50kpps. as you can imagine, the load is pretty high. in fact (as it''s a dual xeon at

Hi folks. This message may be a bit verbose and not as techie as the ones I''ve seen in this list, but describing the scenario will save a lot of messages. Scenario: A building with 17 floors, each floor with 24 offices (totals 408 offices) connected to the backbone through a border switch (1 vlan for each office). The offices can lease bandwidth of 64k, 128k, 256k, 512k, 1M and 2Mbps,

Hello i have some problems on 2.6.14 kernel dummy and iproute :) i have server with 2 nics : eth0 <> inet eth1 <> lan dummy0 (i want to shape incoming traffic from lan machine on this interface) my config: tc qdisc del dev dummy0 root tc qdisc add dev dummy0 root handle 1: htb tc class add dev dummy0 parent 1: classid 1:1 htb rate 100kbit ceil 100kbit tc class add dev dummy0

_netdev The filesystem resides on a device that requires network access (used to prevent the system from attempting to mount these filesystems until the network has been enabled on the system). This device is not a network device (this a SAN not a NAS). To the OS it looks like a normal SCSI attached device, it's /dev/sdb. In the blade there is a HBA (Qlogic) card, and it's

I rebuild mesa with debug symbols, and now top functions using CPU looks like this: CPU: AMD64 family15h, speed 3800 MHz (estimated) Counted CPU_CLK_UNHALTED events (CPU Clocks not Halted) with a unit mask of 0x00 (No unit mask) count 100000 samples % image name symbol name ------------------------------------------------------------------------------- 222978 45.1489

Hello You must add first: vlan (tagged) to eth2 eth2 interface is not tagged by default and not know vlan-s . It is like a cisco if you have 24 ports in cisco by default all ports are in vlan1. if you want to do trunk (with vlans) you myst add (vlans) to this ports (tagged or untagged) So you can compare that all interfaces in linux by default are in one vlan(but not tagged). (only for

Is it possible to monitor Core Events and Uncore Events simultaneously? Currently, it is not working now in my machine. When I type the command line like this, opcontrol --start-daemon --event=LLC_MISSES:6000::0:1 --event=LLC_REFS:6000::0:1 \ --event=MEM_UNCORE_RETIRED:6000:0x10:0:1 --event=MEM_UNCORE_RETIRED:6000:0x20:0:1 \ --xen=/boot/xen-syms-4.0.1-rc3 --no-vmlinux

Is it possible to monitor Core Events and Uncore Events simultaneously? Currently, it is not working now in my machine. When I type the command line like this, opcontrol --start-daemon --event=LLC_MISSES:6000::0:1 --event=LLC_REFS:6000::0:1 \ --event=MEM_UNCORE_RETIRED:6000:0x10:0:1 --event=MEM_UNCORE_RETIRED:6000:0x20:0:1 \ --xen=/boot/xen-syms-4.0.1-rc3 --no-vmlinux

Hi I have an IBM blade with internal harddisks, in hardware RAID1. I've installed a CentOS 6 64bit on it, everything works just fine. After the installation, I've presented a vdisk to the blade from an external SAN (an HP EVA4000), connected through FiberChannel. I've partitioned the disk, formatted it and mounted it under /store, then added it to fstab. Everything was fine, until I

The DDX eating CPU isn't intrinsically bad. Did you check where perf says the CPU time is going? Could be doing copies/etc. On Mon, Aug 17, 2020 at 12:52 AM Andrew Randrianasulu <randrianasulu at gmail.com> wrote: > > I was testing Ilia's patches for ddx, and while they definitely helped for Xorg itself, > qemu still eats a lot of CPU if launched like this > >

I was testing Ilia's patches for ddx, and while they definitely helped for Xorg itself, qemu still eats a lot of CPU if launched like this qemu-system-x86_64 -cdrom ~/Downloads/ISO/slax-English-US-7.0.8-x86_64.iso -m 1G -display sdl,gl=on -enable-kvm and left for few hours. top - 07:38:01 up 18:05, 2 users, load average: 2,00, 1,89, 1,83 Tasks: 224 total, 3 running, 221 sleeping, 0