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01:37 < nicolas> hi
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10:20  * tessier wonders what isn't compiled into his xen kernel that he needs
10:20 < tessier> Sound doesn't work and my usb hd doesn't work
10:20 < tessier> oof...tons of modules are missing compared to last time. No wonder.
10:21 < tessier> ah...I didn't do make modules_install! Crap.
10:21 < tessier> hmm...xen seems to have done that for me.
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10:39 < tessier> Cpu(s):  0.0% us,  0.0% sy,  0.0% ni,  0.0% id, 100.0% wa,  0.0% hi,  0.0% si
10:40 < tessier> Anyone heard of any bugs with xen being very slow in IO on amd64?
10:40 < tessier> I am having some real performance problems. Backups can be blazing slow too. Might have something to do with interprocess IO or something.
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11:08 < tessier> How is iowait calculated by top and how does xen report it? One xen instance which is not doing anything as far as I can see is showing nearly 100% iowait. Domain0 shows iowait radically jumping around from 3 to 99% and another shows very little iowait
11:09 < tessier> Sometimes xen seems very slow in disk io
11:10 < tessier> And does iostat in domain0 report total system disk io or just disk io caused by domain0?
11:10 < tessier> I am seeing 400 tps in domain0 according to iostat
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11:21 < tessier> hmm...mem-set and mem-max still don't seem to work either
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11:22 < tessier> I have never been able to increase the memory of a running domain.
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11:31 < jonmason> tessier: are you problems in dom0 or domU?
11:31 < tessier> To which problem do you refer? :)
11:33 < jonmason> tessier: everything
11:33 < jonmason> I don't think USB works at all
11:33 < tessier> USB does work, it's great. At least, it did before I upgraded my xen.
11:33 < jonmason> harry might know, but I don't see him on
11:33 < tessier> I think I am missing some modules for some reason. They do not seem to be automatically loading.
11:34 < jonmason> tessier: are you usin a custom  .config or the default?
11:34 < tessier> The default except I had to enable nv_sata for my hard disk to work
11:37 < tessier> Being unable to change the amount of memory in a domain is changing memory from dom0 on a domU
11:40 < jonmason> hmm
11:40 < jonmason> Automatic kernel module loading  is enabled by default
11:41 < jonmason> for dom0
11:41 < jonmason> I haven't noticed any IO problems, but I'm not doign much comparison to base linux
11:41 < tessier> Well, I think my IO problems might have been with one of my domains swapping like mad.
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11:56 < jonmason> ah
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13:13 < tessier> Wow, the load average bug has been fixed. Cool.
13:18 < timster> there was a load average bug?
13:19 < timster> testing or unstable?
13:19 < tessier> Yeah...no-load load average was 1.0 before instead of 0
13:19 < tessier> unstable
13:19 < tessier> we... xen 3.0
13:20 < sdague> tessier: now it is just always 0
13:20 < sdague> instead of always 1
13:21 < sdague> at least that's how it looks to me
13:21 < tessier> It's not always 0 for me. It looks like it is behaving normally
13:24 < sdague> right.  I'm running some tight loop items
13:25 < sdague> while load average looks technically correct, it definitely means something different than bare iron
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13:28 < tessier> Right. I would expect it to only show the load average for the domain itself.
13:30 < tessier> Would be nice if xen had some way to show cpu and disk io loads for the whole machine
13:30 < sdague> right, but for instance if you run something in a tight loop, and run top, load average in a Xen domain ends up at 2
13:30 < sdague> instead of just past 1, which is how it works on bare iron
13:31 < sdague> while technically correct, it can easily be misinterpretted
13:34 < tessier> I see. Odd that it ends up at 2. Why is that technically correct?
13:36 < sdague> sorry, because of my specific test
13:36 < sdague> I have a perl command line running a system() in a tight loop 
13:37 < sdague> on a xen domU it sees both perl and sh in the R state on every poll, thus ~ 2 load
13:37 < sdague> on a bare iron it doesn't, thus ~1 load
13:37 < sdague> it may have to do with IO to /dev/null
13:38 < sdague> regardless, it is different enough that while technically it is correct (number of things in run q), what we've gotten used to those numbers meaning don't mean the same thing in a Xen env
13:42 < fith> Heh, it just highlights that load avg is a mostly useless statistic :)
13:47 < sdague> which is why I think it was a bit better when it just said 1 for xen DomUs, as that is really more like the truth :)
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18:27 < tessier> So the question now is...why is my new xen kernel barely loading any modules whereas the old one loaded a ton of modules automatically which made things such as my usb hd and my sound card work?
18:33 < tessier> oh crap!
18:33 < tessier> And it built a non-smp kernel!
18:36 < jonmason> lol
18:36 < jonmason> user error
18:36 < hollisb> heh
18:36 < tessier> Last time it built an SMP kernel with support for my sound card and usb by default.
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18:37 < tessier> Now I get to go through make menuconfig and guess and what drivers I need to enable
18:37 < jonmason> I'm building a new one now, I'll see how it goes
18:37 < jonmason> tessier: lspci is your friend
18:37 < knewt> people-- # suck
18:40 < tessier> ok, ac97 sound and usb mass storage...that should be what I need
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18:47 < velplin> I have a single Xeon P4 machine running Xen 3 and xenlinux 2.6.? running dreadfully slow through its on-boot module scan....  any clues out there? (cross-speaking from freenode).
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19:09 < tessier> Sweet. My sound and USB work again. And both cpu's are alive.
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19:39 < knewt> geez, one of my servers is a bit old. 2.6.9, built december 30th 2004
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19:53 < tessier> That's nothing. Until a few months ago I had a server running a 2.2 kernel!
19:59 < johnlev> anyone know if check_logging is intentionally never used?
20:11 < knewt> does it work to put the 3.0 binaries on a system that already has the 2.0 binaries?
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22:45 < knewt> bah. looking at the contents of dist/install against a 'find' on the existing xen2 system i'm looking at using, stuff clashes. so i'm going to have to tar up the existing xen stuff and then remove it all, to be safe :(
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23:32 < knewt> bah. i can boot into my nice new xen3/2.6.12 kernel, but it hangs while running udevstart :(
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--- Log closed Wed Nov 02 23:59:00 2005