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Forum: Msieve 2021-10-22, 13:34
Replies: 117
Views: 19,607
Posted By ryanp
In general, given a GPU with X GB RAM, and an N x...

In general, given a GPU with X GB RAM, and an N x N matrix, is there a way to determine (reasonably) optimal VBITS and block_nnz values?
Forum: Msieve 2021-08-07, 16:20
Replies: 117
Views: 19,607
Posted By ryanp
That's quite impressive. I dug this up which I...

That's quite impressive. I dug this up which I believe was your MPI run of a 109.4M matrix from a few months back?

linear algebra completed 20216008 of 109441779 dimensions (18.5%, ETA 854h19m)
Forum: Msieve 2021-08-06, 21:20
Replies: 117
Views: 19,607
Posted By ryanp
On that note, though, are there any plans to...

On that note, though, are there any plans to support multiple GPUs? If a single A100 is this fast, 16x A100's (https://cloud.google.com/blog/products/compute/a2-vms-with-nvidia-a100-gpus-are-ga) with...
Forum: Msieve 2021-08-06, 20:02
Replies: 117
Views: 19,607
Posted By ryanp
Indeed! No, sadly, "just" A100 and...

Indeed!



No, sadly, "just" A100 and V100's.
Forum: Msieve 2021-08-06, 18:03
Replies: 117
Views: 19,607
Posted By ryanp
Looks like it's working now with VBITS=128, and a...

Looks like it's working now with VBITS=128, and a pretty decent runtime:

./msieve -v -g 0 -i ./f/input.ini -l ./f/input.log -s ./f/input.dat -nf ./f/input.fb -nc2 block_nnz=1000000000
...
matrix...
Forum: Msieve 2021-08-06, 16:39
Replies: 117
Views: 19,607
Posted By ryanp
Tried a bunch of settings: * all of 100M,...

Tried a bunch of settings:

* all of 100M, 500M, 1000M, 1750M with VBITS=256 all ran out of memory
* managed to get the matrix down to 27M with more sieving. VBITS=256, 1750M still runs out of...
Forum: Msieve 2021-08-06, 14:05
Replies: 117
Views: 19,607
Posted By ryanp
Trying this out on an NVIDIA A100. Compiled and...

Trying this out on an NVIDIA A100. Compiled and starts to run. I'm invoking with:

./msieve -v -g 0 -i ./f/input.ini -l ./f/input.log -s ./f/input.dat -nf ./f/input.fb -nc2

Fri Aug 6 12:43:59...
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