3 ms·

Nice option, how much compute power does these ARM servers offer though?

tuxone 12y ago
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: 1.5219 per-request statistics: min: 0.14ms avg: 0.15ms max: 4.68ms approx. 95 percentile: 0.16ms Threads fairness: events (avg/stddev): 10000.0000/0.00 execution time (avg/stddev): 1.5219/0.00 C1 $ 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: 27.0053s total number of events: 10000 total time taken by event execution: 26.9926 per-request statistics: min: 2.69ms avg: 2.70ms max: 2.84ms approx. 95 percentile: 2.72ms Threads fairness: events (avg/stddev): 10000.0000/0.00 execution time (avg/stddev): 26.9926/0.00
- zeograd 12y ago
  Not that it'd cover for the difference but note that you're only using one of the 4 threads of the C1. If I'm not mistaken you only have 1 CPU for a droplet at this price.
  - dwild 12y ago
    The Arm cores are also dedicated while the one on digital ocean is shared.
  - werkshy 12y ago
    ubuntu@c1-10-1-18-157:~$ sysbench --test=cpu --cpu-max-prime=2000 --num-threads=4 run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 4 Doing CPU performance benchmark Threads started! Done. Maximum prime number checked in CPU test: 2000 Test execution summary: total time: 6.7674s total number of events: 10000 total time taken by event execution: 27.0485 per-request statistics: min: 2.69ms avg: 2.70ms max: 7.00ms approx. 95 percentile: 2.70ms Threads fairness: events (avg/stddev): 2500.0000/17.36 execution time (avg/stddev): 6.7621/0.00
- twotwotwo 12y ago
  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 Total time is 2.4926s with --num-threads=4.
monstermonster 12y ago
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 least interesting trivia.
- rakoo 12y ago
  Thanks for the trivia. Just to continue on this path, how many virtualized instances can you put on your machine ?
  - monstermonster 12y ago
    Not tried to push it but it has 20 Windows Server 2012 R2 instances running on it at the moment all with 8Gb of memory (this is overcommitted dynamic memory). Disk is on a SAN larger than my kitchen. I span up a Linux VM quickly to do a bogomips on :) I can probably push 40 of those onto it without it bending too terribly. If I knock the RAM down to 2Gb an instance I could probably quite happily get 64-100 on it in theory. I think memory bandwidth might kill it before CPU does. We have two almost full (18 each) 42U racks of those machines (bar switches) so across the 720 E5 cores with 4.6TiB of RAM there is about 4.3 million bogomips. Fun :) (most of this is corporate fileservers, exchange, AD, various crappy apps, network appliances, web servers, SQL servers and idles at around 20% in use). If it all went off you'd need earplugs and fireman's equipment.
- dwild 12y ago
  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.
  - monstermonster 12y ago
    Interesting! However if you want one fast core, you're screwed :)

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: 1.5219 per-request statistics: min: 0.14ms avg: 0.15ms max: 4.68ms approx. 95 percentile: 0.16ms Threads fairness: events (avg/stddev): 10000.0000/0.00 execution time (avg/stddev): 1.5219/0.00 C1 $ 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: 27.0053s total number of events: 10000 total time taken by event execution: 26.9926 per-request statistics: min: 2.69ms avg: 2.70ms max: 2.84ms approx. 95 percentile: 2.72ms Threads fairness: events (avg/stddev): 10000.0000/0.00 execution time (avg/stddev): 26.9926/0.00

zeograd 12y ago
Not that it'd cover for the difference but note that you're only using one of the 4 threads of the C1. If I'm not mistaken you only have 1 CPU for a droplet at this price.
- dwild 12y ago
  The Arm cores are also dedicated while the one on digital ocean is shared.
- werkshy 12y ago
  ubuntu@c1-10-1-18-157:~$ sysbench --test=cpu --cpu-max-prime=2000 --num-threads=4 run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 4 Doing CPU performance benchmark Threads started! Done. Maximum prime number checked in CPU test: 2000 Test execution summary: total time: 6.7674s total number of events: 10000 total time taken by event execution: 27.0485 per-request statistics: min: 2.69ms avg: 2.70ms max: 7.00ms approx. 95 percentile: 2.70ms Threads fairness: events (avg/stddev): 2500.0000/17.36 execution time (avg/stddev): 6.7621/0.00
twotwotwo 12y ago
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 Total time is 2.4926s with --num-threads=4.

monstermonster 12y ago

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 least interesting trivia.

rakoo 12y ago
Thanks for the trivia. Just to continue on this path, how many virtualized instances can you put on your machine ?
- monstermonster 12y ago
  Not tried to push it but it has 20 Windows Server 2012 R2 instances running on it at the moment all with 8Gb of memory (this is overcommitted dynamic memory). Disk is on a SAN larger than my kitchen. I span up a Linux VM quickly to do a bogomips on :) I can probably push 40 of those onto it without it bending too terribly. If I knock the RAM down to 2Gb an instance I could probably quite happily get 64-100 on it in theory. I think memory bandwidth might kill it before CPU does. We have two almost full (18 each) 42U racks of those machines (bar switches) so across the 720 E5 cores with 4.6TiB of RAM there is about 4.3 million bogomips. Fun :) (most of this is corporate fileservers, exchange, AD, various crappy apps, network appliances, web servers, SQL servers and idles at around 20% in use). If it all went off you'd need earplugs and fireman's equipment.
dwild 12y ago
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.
- monstermonster 12y ago
  Interesting! However if you want one fast core, you're screwed :)