skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: TCP Throughput Profiles Using Measurements over Dedicated Connections

Abstract

Wide-area data transfers in high-performance computing infrastructures are increasingly being carried over dynamically provisioned dedicated network connections that provide high capacities with no competing traffic. We present extensive TCP throughput measurements and time traces over a suite of physical and emulated 10 Gbps connections with 0-366 ms round-trip times (RTTs). Contrary to the general expectation, they show significant statistical and temporal variations, in addition to the overall dependencies on the congestion control mechanism, buffer size, and the number of parallel streams. We analyze several throughput profiles that have highly desirable concave regions wherein the throughput decreases slowly with RTTs, in stark contrast to the convex profiles predicted by various TCP analytical models. We present a generic throughput model that abstracts the ramp-up and sustainment phases of TCP flows, which provides insights into qualitative trends observed in measurements across TCP variants: (i) slow-start followed by well-sustained throughput leads to concave regions; (ii) large buffers and multiple parallel streams expand the concave regions in addition to improving the throughput; and (iii) stable throughput dynamics, indicated by a smoother Poincare map and smaller Lyapunov exponents, lead to wider concave regions. These measurements and analytical results together enable us to select a TCP variantmore » and its parameters for a given connection to achieve high throughput with statistical guarantees.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2];  [2];  [3];  [4]
  1. ORNL
  2. University of Massachusetts, Amherst
  3. Argonne National Laboratory (ANL)
  4. University of Chicago
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
1399535
DOE Contract Number:
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 26th International Symposium on High-Performance Parallel and Distributed Computing - Washington, District of Columbia, United States of America - 6/26/2017 4:00:00 AM-6/30/2017 4:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Rao, Nageswara S., Liu, Qiang, Sen, Satyabrata, Towsley, Don, Vardoyan, Gayane, Kettimuthu, R., and Foster, Ian. TCP Throughput Profiles Using Measurements over Dedicated Connections. United States: N. p., 2017. Web. doi:10.1145/3078597.3078615.
Rao, Nageswara S., Liu, Qiang, Sen, Satyabrata, Towsley, Don, Vardoyan, Gayane, Kettimuthu, R., & Foster, Ian. TCP Throughput Profiles Using Measurements over Dedicated Connections. United States. doi:10.1145/3078597.3078615.
Rao, Nageswara S., Liu, Qiang, Sen, Satyabrata, Towsley, Don, Vardoyan, Gayane, Kettimuthu, R., and Foster, Ian. Thu . "TCP Throughput Profiles Using Measurements over Dedicated Connections". United States. doi:10.1145/3078597.3078615. https://www.osti.gov/servlets/purl/1399535.
@article{osti_1399535,
title = {TCP Throughput Profiles Using Measurements over Dedicated Connections},
author = {Rao, Nageswara S. and Liu, Qiang and Sen, Satyabrata and Towsley, Don and Vardoyan, Gayane and Kettimuthu, R. and Foster, Ian},
abstractNote = {Wide-area data transfers in high-performance computing infrastructures are increasingly being carried over dynamically provisioned dedicated network connections that provide high capacities with no competing traffic. We present extensive TCP throughput measurements and time traces over a suite of physical and emulated 10 Gbps connections with 0-366 ms round-trip times (RTTs). Contrary to the general expectation, they show significant statistical and temporal variations, in addition to the overall dependencies on the congestion control mechanism, buffer size, and the number of parallel streams. We analyze several throughput profiles that have highly desirable concave regions wherein the throughput decreases slowly with RTTs, in stark contrast to the convex profiles predicted by various TCP analytical models. We present a generic throughput model that abstracts the ramp-up and sustainment phases of TCP flows, which provides insights into qualitative trends observed in measurements across TCP variants: (i) slow-start followed by well-sustained throughput leads to concave regions; (ii) large buffers and multiple parallel streams expand the concave regions in addition to improving the throughput; and (iii) stable throughput dynamics, indicated by a smoother Poincare map and smaller Lyapunov exponents, lead to wider concave regions. These measurements and analytical results together enable us to select a TCP variant and its parameters for a given connection to achieve high throughput with statistical guarantees.},
doi = {10.1145/3078597.3078615},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: