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[Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs w
From: |
Brett Merrick |
Subject: |
[Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2() |
Date: |
Sun, 20 Mar 2016 20:47:20 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:25.7) Gecko/20151013 Firefox/31.9 PaleMoon/25.7.3 |
Follow-up Comment #2, bug #47478 (project octave):
Thanks for taking the time to test it on your machine.
Like you, I also wondered whether the fft* functions are already
multi-threaded. They do not appear to be. This I say based on visual
inspection of the CPU core loads, using the System Monitor in Mint 17, while
calling fft2 on a large matrix. If I use a matrix large enough, a single call
to fft2 can take about 15 seconds, in which only one CPU core seems to be
doing all the work.
In fact, that observation was the main reason I tried parcellfun on fft2. The
2D FFT is *the* bottleneck in my computations, and fft2 does not seem to make
good use of the available CPU cores. So I figured I'd pass different matrices
to different processes.
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- [Octave-bug-tracker] [bug #47478] parcellfun() hangs when used with @fft2(), b vanmarwijk, 2016/03/20
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Mike Miller, 2016/03/20
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(),
Brett Merrick <=
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Olaf Till, 2016/03/20
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Lachlan Andrew, 2016/03/20
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Olaf Till, 2016/03/21
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Mike Miller, 2016/03/21
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Brett Merrick, 2016/03/21
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Olaf Till, 2016/03/21
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Mike Miller, 2016/03/21
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Olaf Till, 2016/03/22
- [Octave-bug-tracker] [bug #47478] parallel package: parcellfun() hangs when used with @fft2(), Mike Miller, 2016/03/22