> Follow @online_en on Twitter and send us a direct message with your email. Don't they have to follow YOU to be able to do that?
Yes. They won't be getting anybody sending them a direct message.
Just tweet them and they'll follow you.
Online Labs – ARM servers in the cloud
21–30 of 41 posts
Re: Online Labs – ARM servers in the cloud
#22Re: Online Labs – ARM servers in the cloud
#23Argh.. 15 minutes wasn't enough to download openjdk7 and run some tests :-(. Can anyone invite me?
Re: Online Labs – ARM servers in the cloud
#24Earlier quoted context omitted.
Not a scientific measure by ANY measure, but a similar core I googled appears to kick out about 200 bogomips whereas a virtual Xeon E5-2690 v2 core on one of my machines knocks out 5984 bogomips. I have 20 of those Xeon cores and 128Gb of RAM in a 2U. Comparing the ratio of bogomips you'd have to get 598 of those ARM machines in a 2U to get the same bogomips. Like I said this isn't even slightly scientific but is at…
I found other source where they said it's around 1200 bogomips for a single core. That would means that you only need 5 times more core which is far from being an issue, 100 cores, which means only 25 processors.
Interesting!
However if you want one fast core, you're screwed :)
Re: Online Labs – ARM servers in the cloud
#25Their next generation should include a SoC with a GPU. GPUs make these little processors even more interesting.
Re: Online Labs – ARM servers in the cloud
#26Nice option, how much compute power does these ARM servers offer though?
Not a scientific measure by ANY measure, but a similar core I googled appears to kick out about 200 bogomips whereas a virtual Xeon E5-2690 v2 core on one of my machines knocks out 5984 bogomips. I have 20 of those Xeon cores and 128Gb of RAM in a 2U. Comparing the ratio of bogomips you'd have to get 598 of those ARM machines in a 2U to get the same bogomips. Like I said this isn't even slightly scientific but is at…
ARMv7 means they are probably using 32-bit Cortex A9 processors. Those are quite old, and probably on a 40nm process. The state of the art right now are these from Applied Micro:
http://www8.hp.com/us/en/products/proliant-servers/product-d...
AMD will enter the market soon, too, but I think Applied Micro will hold its first mover advantage with its 3rd gen chips coming next year.
Re: Online Labs – ARM servers in the cloud
#27Earlier quoted context omitted.
Just tweet them and they'll follow you.
Thanks, used IRC, preferred that anyway, was just curious if I missed something regarding twitter.
For a while you could configure your account to allow DMs from people you don't follow. That was removed, but I suspect it may still exist for big companies/verified accounts.
Re: Online Labs – ARM servers in the cloud
#28Nice option, how much compute power does these ARM servers offer though?
Really silly test 10$/mo droplet $ sysbench --test=cpu --cpu-max-prime=2000 run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 1 Doing CPU performance benchmark Threads started! Done. Maximum prime number checked in CPU test: 2000 Test execution summary: total time: 1.5297s total number of events: 10000 total time taken by event execution: 1.521…
For comparison, Cortex-A15-based (32-bit Tegra K1) Acer Chromebook 13:
sysbench 0.4.12: multi-threaded system evaluation benchmark
Running the test with following options:
Number of threads: 1
Doing CPU performance benchmark
Threads started!
Done.
Maximum prime number checked in CPU test: 2000
Test execution summary:
total time: 8.8170s
total number of events: 10000
total time taken by event execution: 8.8083
per-request statistics:
min: 0.83ms
avg: 0.88ms
max: 21.43ms
approx. 95 percentile: 0.95ms
Threads fairness:
events (avg/stddev): 10000.0000/0.00
execution time (avg/stddev): 8.8083/0.00
Re: Online Labs – ARM servers in the cloud
#29Earlier quoted context omitted.
I found other source where they said it's around 1200 bogomips for a single core. That would means that you only need 5 times more core which is far from being an issue, 100 cores, which means only 25 processors.
Interesting! However if you want one fast core, you're screwed :)
Yes, but considering that newer CPUs do not have increasing frequencies, I guess you are more or less doomed to scale horizontally, and not vertically anymore.
Re: Online Labs – ARM servers in the cloud
#30I think the big use case for ARM in datacenters, over the next few years, is for servers whose CPU usage is very low today--they're consistently network-bound or they just act as a relatively dumb interface to RAM or disk (memcached, some distributed DBs, some dumb proxies). Baidu uses ARM for cloud storage, Facebook used AMD servers for memcached despite their lagging Intel on speed. Basically, you look elsewhere when a Xeon is too much.
Someday comes a point where apps that actually are compute-bound might want to use more, slower cores for power/density/cost/etc.--I just don't think that cutover is tomorrow for the kind of apps (most of) you or I work on.
Further out: This is a Marvell-designed core that looks slower than the Cortex-A15-based Tegra K1 in a Chromebook (posted results elsewhere in the comments; it could be a clock-speed issue, not anything inherent to the core designs). Further out, there're some 64-bit ARM cores (Cortex-A57, X-Gene, Project Denver though that may not wind up in servers) and at process bumps (like TSMC 20nm). Related, check out http://www.anandtech.com/show/8580/hp-appliedmicro-and-ti-br... if you haven't. Of course, Intel isn't sleeping, and low-power x86 chips will improve, too; there will be 14nm versions of the Atom-based Xeons someday. As ever, fun times.