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| Who | What | When |
|---|---|---|
| *** | Nahual has joined #arpnetworks | [05:42] |
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| nathani | ix33: can you ping6 anything? | [15:01] |
| .......... (idle for 45mn) | ||
| ix33 | nathani: garry got it
it was a setting on a new thunder instance VLAN now, if someone would just fix vioblk on openbsd... | [15:46] |
| ...... (idle for 25mn) | ||
| mercutio | ix33: openbsd's disk subsystem in general isn't great :(
it really needs an overhaul but i haven't seen anyone looking to spend a lot of time on it | [16:12] |
| ix33 | no kidding
untar of src.tar.gz on a physical 2-core box w/ssd in openbsd is ~100s | [16:13] |
| mercutio | it's kind of embarassing, like when openbsd had no smp :) | [16:14] |
| ix33 | which is awful | [16:14] |
| mercutio | with or without softdep? | [16:14] |
| ix33 | good question | [16:14] |
| mercutio | i think slow untar with openbsd is to do with poor write behind | [16:14] |
| ix33 | nosoftdep is default, so that | [16:15] |
| mercutio | i'd try comparing with sofdep then | [16:15] |
| ix33 | well that's a physical host
same default setup on a VPS instance is ~600s | [16:15] |
| mercutio | ssd's aren't instant for acknowledging writes normally
they're faster than hard-disk, but still.. if there are a lot of files it can add up so if openbsd can keep writing stuff without waiting then performance can e higher openbsd 6.0 src.tar.gz ? | [16:16] |
| ix33 | mercutio: yes | [16:18] |
| mercutio | i want to compare | [16:18] |
| ix33 | i know that's a ton of little, highly compressed files... | [16:18] |
| mercutio | yeah | [16:18] |
| ix33 | going to put freebsd on this thing just to compare & feel depressed about it
i mean, 100s on the host i'm referring to is absolutely abysmal | [16:19] |
| mercutio | i got 1 minute 2 seconds on a vps
with softdep though | [16:24] |
| ix33 | yeah rebooting to try that
(/) theo doesn't make fun of people for using softdep, does he? | [16:25] |
| mercutio | no idea
i remounted with softdep it seems you can do it live, at least it doesn't complain | [16:25] |
| ix33 | -o remount works? | [16:27] |
| mercutio | mount -u -o softdep /
1 minute 50 seconds withotu softdep on vps | [16:27] |
| ix33 | kvm/vioblk? | [16:27] |
| mercutio | yeah | [16:28] |
| ix33 | which version of openbsd? | [16:28] |
| mercutio | 6.0 | [16:28] |
| ix33 | something doesn't add up | [16:28] |
| mercutio | how so?
you weren't using softdep i got 1 minute 50 without softdep, 1 minute 02 with softdep | [16:28] |
| ix33 | <@mercutio> 1 minute 50 seconds withotu softdep on vps
wow 91s on the slow FS with softdep | [16:28] |
| mercutio | softdep slowed it down for you?
hmm, i have noatime too it seemms | [16:29] |
| ix33 | no softdep sped up
from 800s on that guy i think | [16:30] |
| mercutio | i thought you got a minute without softdep | [16:31] |
| ix33 | no that was the physical host
i'm kicking a VPS at the moment 90s on the VPS with softdep is <3 <3 <3 testing on metal too now | [16:31] |
| mercutio | what is sad is how much faster linux is :( | [16:33] |
| ix33 | no kidding
like 5s on a haswell w/ssd btrfs even :/ | [16:33] |
| mercutio | i got 5.2 seconds
dman you are faster than me | [16:33] |
| ix33 | lol | [16:33] |
| mercutio | hey it used more than 100% cpu
tar vxzf ../src.tar.gz 2.94s user 3.04s system 114% cpu 5.222 total | [16:34] |
| ix33 | 13s on a big zfs fbsd machine too | [16:34] |
| mercutio | oh this was zfs on linux | [16:34] |
| ix33 | ^^^^opterons | [16:34] |
| mercutio | i think it's haswell too actually
yeah i7-4770 | [16:34] |
| ix33 | haswell i5 here | [16:34] |
| mercutio | same diff basically
i have lz4 enabled too but i doubt it makes any significant diff | [16:35] |
| ix33 | you know i saw the damnedest thing, speaking of this opteron | [16:35] |
| mercutio | but yeah i wish openbsd's disk subsystem would be fixed up | [16:35] |
| ix33 | the default cipher on ssh/scp is 70% the speed on the opteron as on a haswel-era pentium d
both machines capable of gig-E wire speed (verified with ioperf) both freebsd 10.3 machines testing to the haswell linux box | [16:36] |
| mercutio | cypher can make a huge diff on some machines
i don't think pentium d's have aesni but on such capable machines that can make cpu utilisation of such vary a lot except openbsd doesn't trust it hah i think there's a new djb one now chacha20 | [16:37] |
| ix33 | yeah
i was about to tear that machine apart and test new NICs | [16:39] |
| anyway, thanks for the pointer mercutio | [16:46] | |
| mercutio | you're welcome | [16:46] |
| ix33 | the stuff i've been googling for has been virt* specific
i didn't look for more general tunings because i was OK with the base-case suckage | [16:46] |
| mercutio | yeah i don't think it's acutally a virtio issue | [16:46] |
| ix33 | garry would be happy to hear that | [16:46] |
| mercutio | openbsd is just quite far behind in disk performance | [16:46] |
| ix33 | since i opened a ticket on it | [16:47] |
| mercutio | there used to be a huge deficiency with smp too
that's getting better | [16:47] |
| ix33 | $ doas /usr/bin/time tar xzpf src.tar.gz 501.06 real 3.78 user 11.95 sys | [16:47] |
| mercutio | like the global lock was around basiclaly everything, where smp was only userland
it's getting a little finer now | [16:47] |
| ix33 | <3 openbsd
i'm ok with what it is but some times it's a head scratcher | [16:47] |
| mercutio | heh | [16:48] |
| ix33 | ^ so that was with a remount of /, which didn't appear to honor the -o softdep | [16:48] |
| mercutio | the time seems to work but mount doesn't seem to update | [16:48] |
| ix33 | ditto the physical box too | [16:49] |
| mercutio | you could edit /etc/fstab and reboot and check it's still good | [16:49] |
| ix33 | right
i shall can't reboot that physical box till after hours tho | [16:49] |
| mercutio | you have an arp vps right? | [16:49] |
| ix33 | yes
a few | [16:49] |
| mercutio | was it migrated/recent? | [16:50] |
| ix33 | this was me testing the new thunder setup
very recent | [16:50] |
| mercutio | ahh so that's on arp thunder | [16:50] |
| ix33 | yes
i'm ok with crap performance on onesy-twosy small VPSes i was actually considering freebsd on the thunder instance if i couldn't make it behave better :/ | [16:50] |
| mercutio | and 90 seconds on softdep? | [16:51] |
| ix33 | it's running now (after reboot)
6.0-current even | [16:52] |
| mercutio | cool
6.1 seems to be delayed. but i don't think it'll improve performance | [16:52] |
| ix33 | well i have just upgraded from 5.7 on everything, so i wasn't current on what's what
$ doas /usr/bin/time tar xzpf src.tar.gz 115.48 rel 2.74 user 5.91 sys daaaaaaang i'll take it if i'm untarring with -p, does it modify atime too? | [16:52] |
| mercutio | maybe
i didn't use p | [16:53] |
| ix33 | that's smoking fast considering where i came from
thanks! | [16:54] |
| mercutio | and i have noatime on
heh it's not too bad with cvs updates and the like tbh like openbsd's disk performance used to bug me a bit on synthetic things like that but for most things that matter like waiting for a cvs update it doesn't seem that bad also openbsd kernel compiles are much faster than linux kernel compiels :) | [16:54] |
| HAS_A_BANANA | I dunno, I compiled a Linux kernel (defconfig) on an SSD with -j12 in 19 seconds...
Hard to beat that. | [16:56] |
| mercutio | i think openbsd is less than 2 minutes for default with one core | [16:56] |
| ix33 | HAS_A_BANANA: holy cow, with what?
(CPU) i admit i had an amd thunderbird last time i compiled a kernel for fun... | [16:57] |
| HAS_A_BANANA | I don't really remember, it was a couple years ago... I think an i5-2400. | [16:58] |
| mercutio | are you sure it didn't fail | [16:58] |
| ix33 | lol | [16:58] |
| mercutio | with -j12 you might not see the failure so easily
i'm compiling openbsd kernel right now :) | [16:58] |
| HAS_A_BANANA | Yes I was sure, mercutio | [16:58] |
| ix33 | make defconf; make bzImage should pretty much always work assuming your env is sane, right? | [16:59] |
| mercutio | well you need as86 etc | [16:59] |
| ix33 | well i feel better now. it's champagne friday. thanks all! | [17:00] |
| mercutio | but yeah you'd think it'd be a tested option | [17:00] |
| ix33 | (even commented on my arpnetworks ticket to that effect) | [17:00] |
| mercutio | damn openbsd kernel compile is slower than it used to be
make 213.31s user 35.44s system 96% cpu 4:17.53 total trying with make -j 3 now actually i think gcc has been getting slower over time make -j3 211.87s user 39.95s system 186% cpu 2:15.26 total | [17:02] |
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| dne | openbsd uses quite old gcc though | [17:24] |
| mercutio | it's recent compared to 2.95? | [17:25] |
| dne | I guess :)
4.2.1 - only 10 years old | [17:25] |
| mercutio | oh wow time flies
how old is 2.95 then? :) 16 years wow | [17:27] |
| dne | 1999 | [17:27] |
| mercutio | oh hangon, july 31 1999 for first release
it looks like it was 10 years ago they abanonded gcc 2.95 looks like openbsd 5.5 was the first release to not include gcc 2.95.3 though may 1 2014 | [17:27] |
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| *** | Nahual has quit IRC (Ping timeout: 258 seconds) | [18:59] |
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