l*9
2 楼
Hi,
I am trying to do parallelization for a computing intensive problem.
I am working on a Linux cluster where each node is a multicore processor.
e.g. 2 or 4 quad-core processor per node.
I want to reduce latency and improve performance as much as possible.
I plan to use multiprocessing and multithreading at the same.
Each process run on a distinct node and each process spawn many threads
on each node. This is a 2 level parallelism.
For multiprocessing, I would like to choose MPI.
For multithreading, I have two choices: openMP or boost::thread (pthread).
Which one has lower latency and higher performance ?
It seems that openMP coding is easier (without touching low level thread
managing manually).
But, it seems that openMP has higher overhead than boost::thread (pthread).
Any help is really appreciated.
thanks
I am trying to do parallelization for a computing intensive problem.
I am working on a Linux cluster where each node is a multicore processor.
e.g. 2 or 4 quad-core processor per node.
I want to reduce latency and improve performance as much as possible.
I plan to use multiprocessing and multithreading at the same.
Each process run on a distinct node and each process spawn many threads
on each node. This is a 2 level parallelism.
For multiprocessing, I would like to choose MPI.
For multithreading, I have two choices: openMP or boost::thread (pthread).
Which one has lower latency and higher performance ?
It seems that openMP coding is easier (without touching low level thread
managing manually).
But, it seems that openMP has higher overhead than boost::thread (pthread).
Any help is really appreciated.
thanks
E*C
3 楼
老板推荐?自荐?
x*z
5 楼
这个啊,可能你全用MPI performance还强点。
【在 l******9 的大作中提到】
: Hi,
: I am trying to do parallelization for a computing intensive problem.
: I am working on a Linux cluster where each node is a multicore processor.
: e.g. 2 or 4 quad-core processor per node.
: I want to reduce latency and improve performance as much as possible.
: I plan to use multiprocessing and multithreading at the same.
: Each process run on a distinct node and each process spawn many threads
: on each node. This is a 2 level parallelism.
: For multiprocessing, I would like to choose MPI.
: For multithreading, I have two choices: openMP or boost::thread (pthread).
【在 l******9 的大作中提到】
: Hi,
: I am trying to do parallelization for a computing intensive problem.
: I am working on a Linux cluster where each node is a multicore processor.
: e.g. 2 or 4 quad-core processor per node.
: I want to reduce latency and improve performance as much as possible.
: I plan to use multiprocessing and multithreading at the same.
: Each process run on a distinct node and each process spawn many threads
: on each node. This is a 2 level parallelism.
: For multiprocessing, I would like to choose MPI.
: For multithreading, I have two choices: openMP or boost::thread (pthread).
j*n
8 楼
这贴留着给所有看看有些金牛男除了满脑子满嘴都是“打炮”之外,还有多么阴险毒辣
,报复心理多么强,不愧是天蝎对宫。
,报复心理多么强,不愧是天蝎对宫。
x*z
9 楼
l*9
11 楼
In MPI libraries with shared memory implemented, we have inter-process
communication or inter-thread communication ?
If it is former, why process has less overhead than thread ?
If it is later, why it has less overhead than openMP and threading?
Does MPI has some built-in advantages over them ?
Any help is really appreciated.
Thanks
【在 x*z 的大作中提到】
: Most MPI libraries have shared memory implemented, which actually has
: less overhead than OpenMP or threading.
communication or inter-thread communication ?
If it is former, why process has less overhead than thread ?
If it is later, why it has less overhead than openMP and threading?
Does MPI has some built-in advantages over them ?
Any help is really appreciated.
Thanks
【在 x*z 的大作中提到】
: Most MPI libraries have shared memory implemented, which actually has
: less overhead than OpenMP or threading.
p*s
22 楼
容贫僧贸然代版大回答。
天象上有海木刑于双鱼双子,交流上很容易出现误解犯迷糊,说越多越错。凶星海王星
在双鱼座又得到木星的加成,接下来的满月又会冲击海王星,所以海王力量很大,所以
隐藏的负面情绪容易爆发,人会焦虑不安,态度会不好,office politics更严重,再
加上旷日持久的天冥刑,犯罪率增加。
八字上说,这是癸巳年,甲寅月,寅巳刑人情绪不好,易有冲突,对八字地支有寅,巳
,申;或天干有金木交战;或天干丙丁为凶神庚辛为食神的尤验。还容易健康出状况,
主要应肺喉咙呼吸系统。
【在 l******k 的大作中提到】
: LOL
: 怎么这么多的抱怨,还要单独开楼说呀
: 小八,最近什么星星不对吗,金牛好像很难控制情绪?
天象上有海木刑于双鱼双子,交流上很容易出现误解犯迷糊,说越多越错。凶星海王星
在双鱼座又得到木星的加成,接下来的满月又会冲击海王星,所以海王力量很大,所以
隐藏的负面情绪容易爆发,人会焦虑不安,态度会不好,office politics更严重,再
加上旷日持久的天冥刑,犯罪率增加。
八字上说,这是癸巳年,甲寅月,寅巳刑人情绪不好,易有冲突,对八字地支有寅,巳
,申;或天干有金木交战;或天干丙丁为凶神庚辛为食神的尤验。还容易健康出状况,
主要应肺喉咙呼吸系统。
【在 l******k 的大作中提到】
: LOL
: 怎么这么多的抱怨,还要单独开楼说呀
: 小八,最近什么星星不对吗,金牛好像很难控制情绪?
z*x
23 楼
很多事原来在天象上也有解释。 请问那些人的犯罪也是他们命中一早就注定了的吗?
【在 p*********s 的大作中提到】
: 容贫僧贸然代版大回答。
: 天象上有海木刑于双鱼双子,交流上很容易出现误解犯迷糊,说越多越错。凶星海王星
: 在双鱼座又得到木星的加成,接下来的满月又会冲击海王星,所以海王力量很大,所以
: 隐藏的负面情绪容易爆发,人会焦虑不安,态度会不好,office politics更严重,再
: 加上旷日持久的天冥刑,犯罪率增加。
: 八字上说,这是癸巳年,甲寅月,寅巳刑人情绪不好,易有冲突,对八字地支有寅,巳
: ,申;或天干有金木交战;或天干丙丁为凶神庚辛为食神的尤验。还容易健康出状况,
: 主要应肺喉咙呼吸系统。
【在 p*********s 的大作中提到】
: 容贫僧贸然代版大回答。
: 天象上有海木刑于双鱼双子,交流上很容易出现误解犯迷糊,说越多越错。凶星海王星
: 在双鱼座又得到木星的加成,接下来的满月又会冲击海王星,所以海王力量很大,所以
: 隐藏的负面情绪容易爆发,人会焦虑不安,态度会不好,office politics更严重,再
: 加上旷日持久的天冥刑,犯罪率增加。
: 八字上说,这是癸巳年,甲寅月,寅巳刑人情绪不好,易有冲突,对八字地支有寅,巳
: ,申;或天干有金木交战;或天干丙丁为凶神庚辛为食神的尤验。还容易健康出状况,
: 主要应肺喉咙呼吸系统。
l*k
24 楼
谢谢高僧解惑
我问这个问题,不是针对小八,是因为我自己最近屡遇小人,情绪不安。。。
请问有何解法吗?对金牛影响最大还是泛泛而指?
【在 p*********s 的大作中提到】
: 容贫僧贸然代版大回答。
: 天象上有海木刑于双鱼双子,交流上很容易出现误解犯迷糊,说越多越错。凶星海王星
: 在双鱼座又得到木星的加成,接下来的满月又会冲击海王星,所以海王力量很大,所以
: 隐藏的负面情绪容易爆发,人会焦虑不安,态度会不好,office politics更严重,再
: 加上旷日持久的天冥刑,犯罪率增加。
: 八字上说,这是癸巳年,甲寅月,寅巳刑人情绪不好,易有冲突,对八字地支有寅,巳
: ,申;或天干有金木交战;或天干丙丁为凶神庚辛为食神的尤验。还容易健康出状况,
: 主要应肺喉咙呼吸系统。
我问这个问题,不是针对小八,是因为我自己最近屡遇小人,情绪不安。。。
请问有何解法吗?对金牛影响最大还是泛泛而指?
【在 p*********s 的大作中提到】
: 容贫僧贸然代版大回答。
: 天象上有海木刑于双鱼双子,交流上很容易出现误解犯迷糊,说越多越错。凶星海王星
: 在双鱼座又得到木星的加成,接下来的满月又会冲击海王星,所以海王力量很大,所以
: 隐藏的负面情绪容易爆发,人会焦虑不安,态度会不好,office politics更严重,再
: 加上旷日持久的天冥刑,犯罪率增加。
: 八字上说,这是癸巳年,甲寅月,寅巳刑人情绪不好,易有冲突,对八字地支有寅,巳
: ,申;或天干有金木交战;或天干丙丁为凶神庚辛为食神的尤验。还容易健康出状况,
: 主要应肺喉咙呼吸系统。
a*d
27 楼
d*s
34 楼
不都是土相么为什么互相讨厌
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