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| 12:24:28 | Araq | yglukhov: well the new way is conceptually easier and works without special casing within templates |
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| 12:48:03 | Salewski | Araq, thanks for fixing nimsuggest bugs 40 and 41. Unfortunately https://github.com/nim-lang/nimsuggest/issues/43 generates crashes in valid code, which is a big problem. |
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| 12:51:55 | Araq | looking into it |
| 12:52:20 | Salewski | Would be great, thanks. |
| 12:52:40 | Salewski | Bye... |
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| 14:03:42 | Salewski | Araq, you are really fast! Thanks. (fixed #43) |
| 14:04:11 | Salewski | Bye... |
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| 19:49:26 | perturbation | Anyone seen unicredit? I'm using his linear algebra library and was parallelizing my application, when I ran into some issues sharing memory correctly (my own mistakes about how the refc GC worked). |
| 19:51:15 | perturbation | but the way that the DMatrix64 type (ref to object with seq[float] for data) means that you have to create a manually-memory-managed 'container' that can be used and I wanted to see how easily a manually-memory managed DMatrix64 / Matrix64 would be to add |
| 19:51:18 | perturbation | https://gist.github.com/singularperturbation/6456395e84718bade7edd98e62ba148f |
| 19:51:59 | federico3 | perturbation: unicredit is a bank btw :) |
| 19:52:06 | perturbation | oh :) |
| 19:54:32 | perturbation | The gist is an example of the 'container' workaround (also can use Boehm GC)... the resultMatrix was originally a (ptr DMatrix64) and then I saw it was being GC'd sometimes, so I found a workaround. |
| 19:59:14 | perturbation | I might try to add manually-managed GlobalMatrix / GlobalVector types in a PR... it would make using them efficiently (fewer pointer derefs) across threads a lot easier. I guess andreaferreti would be the person to ask |
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| 21:41:59 | Araq | perturbation: that's more complex than required |
| 21:42:56 | Araq | there is no need for the createShared that only holds a 'ref', protect/dispose the 'ref' and you're good |
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| 21:59:11 | perturbation | Araq: I'm not sure how to use protect / dispose with this - I still need it to be shared since I want all threads to be able to have (at least read) access. |
| 21:59:40 | perturbation | Could I have var a: ptr DMatrix64 -> protect(a[]) rather than having a container type? |
| 22:00:06 | Araq | no, protect the DMatrix64 |
| 22:00:21 | Araq | that's a ref, right? |
| 22:00:36 | perturbation | yeah |
| 22:00:43 | Araq | protect's return type guides you into what you need |
| 22:00:56 | Araq | and yes, this allows shared read access |
| 22:04:22 | perturbation | protect returns a 'ForeignCell' type - I just store protect(fooMatrix) somewhere and then call dispose on the ForeignCell returned by protect when it's done ? |
| 22:04:43 | Araq | yup |
| 22:04:58 | perturbation | awesome - thanks Araq! I'll play around with this a bit and make a PR for documentation on protect/dispose - I wish I had known about that earlier :) |
| 22:05:13 | Araq | you're welcome as are your PRs |
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