| |
| |
| |
|
Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Comments:
<0> CompHoppy, piss off already
<0> you're not fooling anyone
<1> I guess megaton doesn't hang out here anymore? :(
<2> CompHobby you in n3ws too? they have those and more feeds
<1> Is he in iraq?
<0> rip: nope, I'm not
<3> poorboy: not with rm-f down, again.
<1> blah
<3> ot mentioned shipping a new rm-f soon, ish, maybe.
<1> hmm.
<1> I could host it.
<1> On my box at work.
<3> well, you'd have to speak to him. i know almost nothing about rm-f beyond that.
<1> hehe I remember when rm-f got found in the ceiling at ot's work. :P
<0> I've been planning to host my site that way for a while
<0> I just need to find an outlet and an ethernet jack at school in an out of the way area
<0> preferably with piping or conduit on the ceiling to hide it on
<1> lol.
<1> I just bought a hard drive for my buddy's box at work.
<1> We're plugged into sterling's backend.
<1> Last month I did 20gb of bandwidth on my site.. and they didn't say anything.
<0> I don't even know how much bandwidth I use
<0> I know it would fit on a CD per year, or thereabouts
<1> My buddy paid the $50 for a decommissioned server.
<4> im too dumb to use a calculator to find out lol
<1> And they let us rack them and take one ip.
<0> CompHoppy, you're not fooling anyone.
<1> We can host whatever we want on them.
<1> As long as it's not like... warez and kiddy porn and ****. :P
<0> gee, THAT wasn't a surprise at all
<5> poorboy if CompHobby whines will you ban me?
<0> someone want to ban the troll?
<0> go ahead and ban me too if you think I'm involved, though I am not
<5> jeez you try to give someone optimization tips as requested. then they cant handle the brutal honesty given
<1> I really should alias bk to /bki.
<3> heh.
<0> heh
<0> ban, kick, ignore?
<3> typically, yes.
<1> Yeah
<6> http://people.freebsd.org/~csjp/sun4v.txt
<7> csjp: oooh
<7> 24 CPUs?
<7> dual 12-core?
<6> aedinius: it's actually 8 cores, 4 threads per core
<2> secksee
<7> Oh
<1> :)
<7> That would make sense.
<1> hardware hottness
<7> Ah, 8 cores, 1 FPU.
<6> aedinius: it's a pretty interesting architecture
<7> Yeah
<6> aedinius: Naturally, one problem we are running into is contention
<7> I know the marketing and sales side of it
<7> I had to take training on it at my last job when it released
<7> contention?
<6> aedinius: so there is some highly experimental changes in our sun4v branch which eliminates a lot of it
<8> poorboy : I've seen megaton around within the past monthish
<6> aedinius: mutex contention
<6> aedinius: there are some global mutexes in FreeBSD which have a lot of threads tripping over eachother for
<7> Ah
<1> Meleneth, next time he comes around will you tell him that I want to talk to him?
<1> Just tell him poorboy wants to talk to him.
<7> Beetlegeuse! Beetlegeuse! Beetlegeuse!
<1> He'll know.
<8> I'll try
<1> Thanks.
<1> If not, ohwell.
<8> whew, it might finally be cooled off enough to finish my javascript / C++ haxxing for the day
<6> aedinius: some of it was around scheduling decisions
<7> Ah.
<6> Ran into problems getting it booting when I first got it, Sun changed the Hypervisor so it could actually return EWOULDBLOCK for writes, which the original incarnation of the sun4v code didn't know about
<6> So, when we changed the code to support the latest hypervisor, things starting working a lot smoother
<6> It's been interesting, though.
<7> Yeah.
<0> there are global mutexes in the FBSD kernel? damn, I didn't know that, I thought they were eradicated a while ago
<0> I'll have to take a look at that..
<6> CompHobby: Unfortunately, yes,
<0> I can see how it would be tempting to add those back when everything was single-CPU however
<6> CompHobby: In some cases, they aren't easily avoidable, however, in other cases, you really want to avoid them. sched_lock is one of them
<6> So, sched_lock has been gunned, and a lot of interesting changes have been made, such as per core run queues
<6> and various other things
<0> yeah, I can see how locking the scheduler would slow things down if other CPUs finished their timeslices or voluntarily released the CPU
<6> CompHobby: we ran into some interesting problems when trying to transition threads from sleeping to running and vice versa, because it's kind of an in between state
<6> without the sched lock
<0> I know they're trying to get rid of the "big kernel lock" on linux right now, but meeting a lot of resistance - another thing that the BKL on linux covers is ioctl calls to drivers apparently
<6> Things seem stable though, for now
<0> (I have to work on linux drivers at work, so I've been reading up on it)
<6> CompHobby: Well, we have an equivalent, it's called Giant
<0> heh
<6> CompHobby: Giant is still around, but we have pushed it out of most high speed paths, like VFS, VM and the network stacks
<6> there are some edge cases where it's still around, but we are working to get rid of it.
<0> I think the calls on linux are kernel_lock() and kernel_unlock() but I'm not too sure, it's called before my code ever has to do anything
<0> yeah, it got removed from most of linux a long time ago but it's still in the crufty messy little-modified code off to the sides
<0> ... I really should get a book on writing FreeBSD drivers too at some point
<6> CompHobby: an interesting problem with getting rid of Giant, is that it tends to expose other problems, and in a lot of cases, it changes the timing just enough to make other, completely non related races much easier to hit. Which can be frustrating.
<0> heh
<0> so you kick it out of another routine, and suddenly everything unrelated breaks?
<6> CompHobby: At the risk of starting a flame war, I've often looked at how Linux does things, and generally I don't like what I see. But it works quite well. And is a decent kernel
<0> I get scared by the comments sometimes
<0> but it was what we used in my intro to operating systems cl*** (2.2 kernel), and I like to think I know my way around it at least moderately well
<0> don't have much kernel mode experience on FreeBSD yet, because I haven't had the time to mess with it, but I hope to
<6> CompHobby: In some cases, one example is this: http://people.freebsd.org/~csjp/sys.mpsafe.fileops.1145896495.diff
<7> csjp: Yeah, I've noticed FreeBSD is a little more elegant than Linux in some cases.
<6> for some reason it makes races in our TTY code easier to hit
<6> CompHobby: I've pretty much concluded it's not this patch that is the problem, so I will likely commit this soon. It results in a ~%6 speed up for MySQL benchmarks like "supersmack" for what it's worth
<0> even though it makes some races easier to hit?
<0> or does it fix that as well
<6> CompHobby: Well, the problem exists with or without this patch, but when you specifically go out of your way to hit the race, it can triggered easier with this patch
<6> CompHobby: my guess is timing
<0> oh, OK
<0> holy moly, 1:30AM... I should get to sleep shortly
<9> move to Sydney. only 3:30pm
<9> :)
<0> hehe
<0> sad part is that I've only been awake for 12 hours now
<6> aedinius: Yeah, it helps when you have folks who roam through the code fixing things up, simply to make things easier on the eye. :)
<6> Easy to read code is a good way for even the novice programmer to spot problems
<6> So it's something I hope continues on
<9> sounds like the last time you'll see good code
<6> hmm?
<6> Well, I am off for the night, later folks.
<2> g'night
<2> CompHobby sleep is one of those things i truly think isn't overrated
<7> calc sleep
<10> Sleep is over-rated (as poorboy pointed out). Sleep also wastes time, makes you go pee-pee when you have nightmares, and you sweat. Nuff said.
<9> you might dream that you bought a gun to shoot George bush , and missed!
<7> I don't want to shoot Bush.
<11> i once dreamt that hillary became the next president
<9> if you want another try there are a few in Australia no-one would miss
<9> strtok, might happen
<7> strtok: That would be ... weird.
<11> it'd be better than jeb
<7> Hm. Another Clinton in office.
<7> I wonder how the interns would work...
<9> or that actress that plays the president becoming one for real
<11> i'd rather have blowjobs than illegal wiretaps
<11> :P
<7> heh
<9> I think she goes for the girls too
<9> become president then you can have both
<11> nah
<11> blowjobs are easy to come by
<11> and i don't care for wiretapping!
<9> I don't mind wiretapping
<9> no phone :)
<9> I do have a mobile
Return to
#c
or
Go to some related
logs:
t-sql hierarchical self join
#beginner
boot record relocation beyond BpB is necessary
dlink 624
#beginner
ipod nano firewire mod
actionscript dynamic text rotation doesn't show
#heroin
original name for the pontiac car was the banshee for its mythicality
variant records delphi
|
|