| --- Log opened Tue Feb 18 00:00:22 2014 |
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| 14:31 | <@celticminstrel> | I can't see a way to explicitly tell git to push matching branches if push.default is set to something else; --all seems close but not quite. Am I missing something? |
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| 21:47 | | * Derakon mutters at one of the microscope cameras. |
| 21:47 | <&Derakon> | This one has the ability to take images that are upwards of ~2500x2000 pixels in size, at 100FPS. |
| 21:47 | <&Derakon> | Except when we try to do that, the rate at which we can offload images from the camera computer drops precipitously. |
| 21:48 | <&Derakon> | The data sequence is camera -> camera computer's fixed-size RAM buffer (administrated by vendor API) -> our C code's arbitrarily-growing queue -> Python code that sends the image over the network -> Python code that receives the data. |
| 21:49 | <&Derakon> | I've verified that the network is not the issue; we can replace the Python segment with "Python code that throws the image away and sends a 512x512 static image over the network" and we get the same slowdown. |
| 21:49 | <&Derakon> | So we can do 200FPS at 512x512, or ~30FPS at 1392x1040, or...10FPS at 2560x2054 or whatever it is. |
| 21:50 | <&Derakon> | At that latter size, the camera is sending us images at 100FPS; they're piling up in the C code queue. |
| 21:50 | <&Derakon> | But we can't offload from the queue fast enough, so the camera computer's RAM requirements blow up. |
| 21:50 | <&Derakon> | Those of you familiar with low-level coding stuff, any ideas? Am I hitting L2 cache limits or something? |
| 21:50 | <&Derakon> | I mean, at full size each image is ~10MB in size. |
| 21:51 | <&Derakon> | (5 megapixels, 2 bytes/pixel) |
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| --- Log closed Wed Feb 19 00:00:05 2014 |