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Tpetra: Fix #4542 (add computeRowOneNorms) #4555
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@trilinos/tpetra Add Tpetra:::computeRowOneNorms function, thus fixing trilinos#4542.
I turned off automerge so that I can get @vbrunini 's feedback before merging. |
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@trilinos/framework uh oh :( |
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Victor likes it; I'm bestowing an autoblessing. |
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@trilinos/tpetra @trilinos/muelu y'all might want this. |
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This looks good to me.
I am guessing that this is out of the scope of this PR but ComputeLocalRowOneNorms
could probably benefit from a second level of parallelism to compute rowNorm
using a parallel_reduce
.
Thanks @lucbv ! :-D I would prefer to optimize the "scale both rows and columns" algorithm first, since it's more generally useful. Also, a good multilevel parallelization should imitate Christian's sparse matrix-vector multiply, by grouping up rows into chunks and doing dynamic load balancing. |
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@trilinos/tpetra
Per request by @vbrunini, add
Tpetra:::computeRowOneNorms
function. @vbrunini wants to use it just for left-side scaling of a matrix. @ikalash may appreciate this, as it closes #240 more directly than the currentTpetra::computeRowAndColumnOneNorms
function, without additional computation or communication (if you only want to scale on the left).Related Issues