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Timing Results Assignment 7: Reduction Operation

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lucasjacobson

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Unread post Thu Nov 05, 2015 1:06 am

Re: Timing Results Assignment 7: Reduction Operation

Test PASSED
N: 50000000
M: 5
GPU result: -4456.61950439989778
CPU result: -4456.61950439955581
GPU exclusive: 2.535328
GPU inclusive: 68.872963
CPU: 65.636894

I had a GPU inclusive of 68.574692 at one point but whatever code that produced that doesn't exist anymore. I also had a GPU exclusive of 2.495680 but optimizing for that resulted in a worse inclusive time.
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baoyunge

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Unread post Thu Nov 05, 2015 1:30 am

Re: Timing Results Assignment 7: Reduction Operation

This is impressive! For me, the memory transaction itself takes about 66ms (pinned). I am wondering is there any trick to reduce this memory transaction time?

sharmilashridhar wrote:N = 50000000
Event:Time for CPU to complete execution: 63.851456 ms
Event:Time to complete execution, GPU Inclusive: 42.520126 ms
Test PASSED
device: -4909.000000 host: -4909.000000
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zhenyuanshen

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Unread post Thu Nov 05, 2015 3:05 am

Re: Timing Results Assignment 7: Reduction Operation

./vector_reduction 50000000 5
Test PASSED
device: 3275.739030 host: 3275.739030
N = 50000000
CPU time: 67.8961
GPU inclusive time: 69.4857
GPU exclusive ime: 2.79379
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lucasjacobson

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Unread post Thu Nov 05, 2015 10:55 am

Re: Timing Results Assignment 7: Reduction Operation

baoyunge wrote:This is impressive! For me, the memory transaction itself takes about 66ms (pinned). I am wondering is there any trick to reduce this memory transaction time?


This was my experience too. I'm not really sure how anybody got better than 66-67 ms.
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chandanahosamanekabbali

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Unread post Wed Nov 25, 2015 10:37 am

Re: Timing Results Assignment 7: Reduction Operation

chosaman@euler01 bin]$ ./hw07_p02 50000000 5
Cpu time = 208.340927
Gpu time = 82.433571
Test PASSED
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xiudongwu

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Unread post Sat Dec 12, 2015 11:29 am

Re: Timing Results Assignment 7: Reduction Operation

CPU time in ms 216
Host sum = 3282.74
Device sum = 3282.84
PASSED
inclusive timing 128.354 ms
Exclusive timing 35.1467 ms
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