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An MPI messaging layer for network processors Wijeyeratnam, Ashley
Abstract
We describe the design and implementation of MPI-NP, a Myrinet communication system tailored to support LAM, a public domain version of MPI. The goals of MPI-NP are to reduce the time spent on the host for message processing, and to promote the overlap of computation and communication. MPI-NP achieves these goals by off-loading as much of the computation as possible to the network processor. MPI-NP relieves the host of several tasks, making more CPU cycles available to the application, but pays a price for heavy utilization of the slower network processor, by adding a significant overhead to message latency. Although part of the overhead can be attributed to the hardware of our testbed, the philosophy of MPI-NP characteristically does not provide the best latency possible because of performance disparities between host and network processors. Users are left with the choice of deciding on the trade-off of latency versus host overhead. Applications which are not latency bound can expect to perform well on MPI-NP.
Item Metadata
| Title |
An MPI messaging layer for network processors
|
| Creator | |
| Publisher |
University of British Columbia
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| Date Issued |
1999
|
| Description |
We describe the design and implementation of MPI-NP, a Myrinet communication system tailored
to support LAM, a public domain version of MPI. The goals of MPI-NP are to reduce the time spent
on the host for message processing, and to promote the overlap of computation and communication.
MPI-NP achieves these goals by off-loading as much of the computation as possible to the network
processor. MPI-NP relieves the host of several tasks, making more CPU cycles available to the
application, but pays a price for heavy utilization of the slower network processor, by adding a
significant overhead to message latency. Although part of the overhead can be attributed to the
hardware of our testbed, the philosophy of MPI-NP characteristically does not provide the best
latency possible because of performance disparities between host and network processors. Users
are left with the choice of deciding on the trade-off of latency versus host overhead. Applications
which are not latency bound can expect to perform well on MPI-NP.
|
| Extent |
2932776 bytes
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| Genre | |
| Type | |
| File Format |
application/pdf
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| Language |
eng
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| Date Available |
2009-06-29
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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| DOI |
10.14288/1.0051683
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| URI | |
| Degree | |
| Program | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
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| Graduation Date |
1999-11
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| Campus | |
| Scholarly Level |
Graduate
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| Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.