Why do graphics cards only monitor the speed of one fan? If the other one fails, it won't know!
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey" <CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey" <CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
On 7/14/2020 11:36 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey"
<CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other
one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
Graphics cards have thousands of compute cores. Most operations on 3D
mesh vertices and pixel "shading" are trivially parallelize-able; the operation pipeline is programmed for a given task and then each core
runs its algorithm on a given vertex or pixel of the scene without
needing any information from the others.
On 2020-07-14 11:36, jlarkin@highlandsniptechnology.com wrote:
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey"
<CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other
one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
GPUs are limited to single-precision floating point IIRC.
Cheers
Phil Hobbs
On 2020-07-14 11:36, jlarkin@highlandsniptechnology.com wrote:
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey"
<CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other
one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
GPUs are limited to single-precision floating point IIRC.
Cheers
Phil Hobbs
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete.-a :-(
Cheers, Gerhard
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete.-a :-(
Cheers, Gerhard
On 7/14/2020 12:14 PM, Gerhard Hoffmann wrote:
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete.-a :-(
Cheers, Gerhard
Another problem of practical value that's NP-complete is the pen-plotter problem or the "postal-route inspection" problem; how do you connect vertices of a vector image with lines such that the total Manhattan
distance the plotter head covers in the process is minimal.
as opposed to the shortest path problem on directed and directed graphs, exact solution to that one is np-complete. There are heuristics that do pretty good
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete. :-(
Cheers, Gerhard
On Tue, 14 Jul 2020 18:14:04 +0200, Gerhard Hoffmann <dk4xp@arcor.de>
wrote:
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete. :-(
Cheers, Gerhard
LT Spice can already use multiple cores, so something is
parallel-izable. The petaflop computers, used for weather and physics simulation, have thousands of CPUs.
Spice is usually fine, but once in a while I want 1000x or so more
speed.
On Tue, 14 Jul 2020 18:14:04 +0200, Gerhard Hoffmann <dk4xp@arcor.de>
wrote:
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete. :-(
Cheers, Gerhard
LT Spice can already use multiple cores, so something is
parallel-izable. The petaflop computers, used for weather and physics simulation, have thousands of CPUs.
Spice is usually fine, but once in a while I want 1000x or so more
speed.
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete.-a :-(
Cheers, Gerhard
On 7/14/2020 11:53 AM, Phil Hobbs wrote:
On 2020-07-14 11:36, jlarkin@highlandsniptechnology.com wrote:
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey"
<CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other
one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
GPUs are limited to single-precision floating point IIRC.
Cheers
Phil Hobbs
That is to say they can do double but they're in general not optimized
for it.
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey" <CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
On Tue, 14 Jul 2020 17:07:31 +0100, bitrex <user@example.net> wrote:
On 7/14/2020 11:53 AM, Phil Hobbs wrote:
On 2020-07-14 11:36, jlarkin@highlandsniptechnology.com wrote:
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey"
<CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other >>>>> one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
GPUs are limited to single-precision floating point IIRC.
Cheers
Phil Hobbs
That is to say they can do double but they're in general not optimized
for it.
Some are.a I always buy the ones that are, since Milkyway at home loves them.
On 7/14/2020 3:31 PM, Commander Kinsey wrote:
On Tue, 14 Jul 2020 17:07:31 +0100, bitrex <user@example.net> wrote:
On 7/14/2020 11:53 AM, Phil Hobbs wrote:
On 2020-07-14 11:36, jlarkin@highlandsniptechnology.com wrote:
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey"
<CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other >>>>>> one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on >>>>> Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
GPUs are limited to single-precision floating point IIRC.
Cheers
Phil Hobbs
That is to say they can do double but they're in general not optimized
for it.
Some are. I always buy the ones that are, since Milkyway at home loves
them.
I suppose one has to buy the "Pro" variant rather than the
gamer/consumer variant.
Moychendizing, moychendizing
On 2020-07-14 12:14, Gerhard Hoffmann wrote:
Am 14.07.20 um 17:50 schrieb bitrex:
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
No. Inverting the conductivity matrix is hard because you
cannot do the pivoting in advance. The necessity shows
up during work.
For transient analysis, every time step builds on the previous one(s)
and you cannot parallelize a lot of them because you don't know
the starting condition of the future ones.
It has been tried often, a working solution would have been worth gold.
I remember the Weitek array coprocessor back in 80386 times and
a try with the NS16032. They never got a factor of more than 2 or 3.
Everything really interesting is np-complete.-a :-(
Cheers, Gerhard
It probably could be, if you changed the scheme so as to impose a speed-of-light propagation limit.-a That way you could divide the
schematic up into chunks, do time steps locally, and then propagate the changes to adjacent chunks.
That gets rid of every node having to know about every other node on
every time step, and makes FDTD codes such as my POEMS facility
parallelize well.-a (It works that way.)
Linear algebra also can be made to vectorize well on the right hardware.
Cheers
On 7/14/2020 11:36 AM, jlarkin@highlandsniptechnology.com wrote:
On Tue, 14 Jul 2020 16:10:17 +0100, "Commander Kinsey"
<CFKinsey@military.org.jp> wrote:
Why do graphics cards only monitor the speed of one fan? If the other one fails, it won't know!
Are graphic cards used mostly for games? And maybe bitcoin mining?
It's weird that one PC can contain more compute power than existed on
Earth in 1970, and be used for games.
I suggested to Mike E that LT Spice should use a graphic card for
computation, but I guess that's not going to happen now.
A modest Windows PC can spin Solidworks 3D images around just fine.
Is SPICE trivially parallelize-able in that way?
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