Cluster:llk-siam-pp06-abstract - Revision history

Skylar at 01:18, 1 October 2005

2005-10-01T01:18:16Z

← Older revision		Revision as of 01:18, 1 October 2005
Line 1:		Line 1:
			== Measuring and Reducing Network Latency in the 2.6 Linux Kernel (v0.6) ==

			Network latency continues to be a bottleneck for many computational science applications on Beowulf clusters. Using open source tools, we develop technology for making nanosecond precision measurements between timing points within the 2.6 Linux kernel. Using this technology, in conjunction with low-level and application benchmarks, we establish that there is significant network latency in the kernel and identify its origin. Lastly, we survey software-based latency reduction technologies and make recommendations based on our measurements.

	== Measuring and Reducing Network Latency in the 2.6 Linux Kernel (v0.5) ==		== Measuring and Reducing Network Latency in the 2.6 Linux Kernel (v0.5) ==

Skylar at 00:48, 1 October 2005

2005-10-01T00:48:19Z

← Older revision		Revision as of 00:48, 1 October 2005
Line 1:		Line 1:
			== Measuring and Reducing Network Latency in the 2.6 Linux Kernel (v0.5) ==

			Network latency continues to be a bottleneck for many computational science applications on Beowulf clusters. Using open source tools, we develop technology for making nanosecond precision measurements between timing points within the 2.6 Linux kernel. Using this technology, in conjunction with low-level and application benchmarks, we establish that there is significant network latency in the kernel and identify its origin. Lastly, we survey available software-based latency reduction technologies and make recommendations based on our measurements.

	== Measuring and Reducing Network Latency in the 2.6 Linux Kernel (v0.4) ==		== Measuring and Reducing Network Latency in the 2.6 Linux Kernel (v0.4) ==

Tmcnulty: abstract v0.4

2005-09-30T21:15:29Z

abstract v0.4

← Older revision		Revision as of 21:15, 30 September 2005
Line 1:		Line 1:
			== Measuring and Reducing Network Latency in the 2.6 Linux Kernel (v0.4) ==

			Network latency continues to be a bottleneck for many computational science applications on Beowulf clusters. Using open source tools, we develop technology for making nanosecond precision measurements between timing points within the 2.6 Linux kernel. Using this technology, in conjunction with low-level and application benchmarks, we establish that there is significant network latency in the kernel and identify its origin. Lastly, we survey available latency reduction technologies and make recommendations based on our measurements.

	== Measuring and Lowering Network Latency in the 2.6 Linux Kernel (v0.3) ==		== Measuring and Lowering Network Latency in the 2.6 Linux Kernel (v0.3) ==

Charliep at 20:45, 30 September 2005

2005-09-30T20:45:37Z

@@ Line 1: / Line 1: @@
-== Lowering Network Latency in the 2.6 Linux Kernel (v0.1) ==
+== Measuring and Lowering Network Latency in the 2.6 Linux Kernel (v0.3) ==
-----
+Network latency continues to be a bottleneck for many computational science applications running on Beowulf clusters.  First, using open source building blocks, we develop technology for accurately making nanosecond measurements between timing points within the Linux 2.6 kernel.  Using this technology, in conjunction with low-level and application benchmarks, we establish that there
 == Lowering Network Latency in the 2.6 Linux Kernel (v0.2) ==
@@ Line 21: / Line 16: @@
 (STP) and zero copy packet transfer. Finally, we develop and benchmark a method
 to reducing network latency in the Linux kernel.

Skylar at 18:53, 30 September 2005

2005-09-30T18:53:56Z

← Older revision		Revision as of 18:53, 30 September 2005
Line 12:		Line 12:

	Network latency continues to be a bottleneck for computational science		Network latency continues to be a bottleneck for computational science
	applications running on Beowulf clusters, First, we develop technology for		applications running on Beowulf clusters. First, we develop technology for
	making nanosecond measurements		making nanosecond measurements
	between timing points within the Linux kernel. Using this technology, in		between timing points within the Linux kernel. Using this technology, in

Skylar at 18:53, 30 September 2005

2005-09-30T18:53:20Z

@@ Line 1: / Line 1: @@
-== Lowering Network Latency in the 2.6 Linux Kernel ==
+== Lowering Network Latency in the 2.6 Linux Kernel (v0.1) ==
 Network latency continues to be a bottleneck for many computational science applications running on Beowulf clusters, that is clusters built out of commodity hardware and open source software.  First, using open source building blocks, we develop technology for accurately making nanosecond measurements between timing points within the Linux 2.6 kernel.  Using this technology, in conjunction with low-level and application benchmarks, we establish that there is measurable network latency in the kernel.  With this benchmarking framework in place we examine and evaluate a range of existing software based approaches to reducing network latency in the kernel e.g. the scheduled transfer protocol (STP) and zero copy packet transfer.  Finally, we develop and benchmark a really nifty, non-obvious, and groundbreaking approach to reducing network latency in the 2.6 Linux kernel.
@@ Line 6: / Line 6: @@
 * Way too long right now (129 words)
 * Note that there was no obvious way to get nanosecond kernel timing events without engineering it ourselves.  "In order to accurately measure where the time was being spent it was necessary to design and develop, using open source building blocks, a timing harness with nanosecond accuracy for the 2.6 Linux kernel."  Or something like that.

Charliep at 17:07, 25 September 2005

2005-09-25T17:07:57Z

New page

== Lowering Network Latency in the 2.6 Linux Kernel ==

Network latency continues to be a bottleneck for many computational science applications running on Beowulf clusters, that is clusters built out of commodity hardware and open source software. First, using open source building blocks, we develop technology for accurately making nanosecond measurements between timing points within the Linux 2.6 kernel. Using this technology, in conjunction with low-level and application benchmarks, we establish that there is measurable network latency in the kernel. With this benchmarking framework in place we examine and evaluate a range of existing software based approaches to reducing network latency in the kernel e.g. the scheduled transfer protocol (STP) and zero copy packet transfer. Finally, we develop and benchmark a really nifty, non-obvious, and groundbreaking approach to reducing network latency in the 2.6 Linux kernel.

Notes
* Way too long right now (129 words)
* Note that there was no obvious way to get nanosecond kernel timing events without engineering it ourselves. "In order to accurately measure where the time was being spent it was necessary to design and develop, using open source building blocks, a timing harness with nanosecond accuracy for the 2.6 Linux kernel." Or something like that.