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The DDS Benchmarking Environment. James Edmondson [email protected]. Vanderbilt University Nashville, TN. Topics. What is the DBE? What technologies does the DBE use? How does the DBE setup the environment? What problems had to be dealt with? What features will be added? - PowerPoint PPT Presentation
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Topics• What is the DBE?• What technologies does the DBE use?• How does the DBE setup the environment? • What problems had to be dealt with? • What features will be added? • Demonstration• Conclusion and Wrap Up
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What is the DBE?• DDS Benchmarking Environment• Sets up the testing environment and framework• Configures and launches implementation specific services• Launches Publishers and Subscribers• Coordinates interaction, logging info, and stats collection• Allows for easily scaling the number of participants• Sets up the statistics for collection by Bagatel
Throu
ghpu
tPub
lishers
NetworkingSubscribers
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What is the DBE?• May be used to test other middleware or technologies• Focus is on documented, reusable resources
Throu
ghpu
tPub
lishers
NetworkingSubscribers
Versatility Dependability
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
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Node 0
DBE
Node 1 Node 2 Node N
What does the DBE do?
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Node 0
DBE
Node 1 Node 2 Node N
Setup TestEnvironment
What does the DBE do?
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Node 0
DBE
Node 1 Node 2 Node N
Setup TestEnvironment
What does the DBE do?
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Setup TestEnvironment
ConfigureImplementation
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Setup TestEnvironment
ConfigureImplementation
Start theSubscribers
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Setup TestEnvironment
ConfigureImplementation
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Setup TestEnvironment
ConfigureImplementation
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Setup TestEnvironment
ConfigureImplementation
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Subscriber Subscriber Subscriber
Setup TestEnvironment
ConfigureImplementation
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Subscriber Subscriber Subscriber
Setup TestEnvironment
ConfigureImplementation
Start thePublisher
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Subscriber Subscriber Subscriber
Setup TestEnvironment
ConfigureImplementation
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What does the DBE do?
Node 0
DBE
Node 1 Node 2 Node N
Publisher Subscriber Subscriber Subscriber
Setup TestEnvironment
ConfigureImplementation
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What technologies does the DBE use?
• Scripts are written in Perl and use PerlAce module• Remote execution is accomplished via SSH• Logs, stats and test info are stored on a NFS partition• All tests are currently ran on Fedora Core Linux machines• Configured to test NDDS, TAO DDS, and Splice• Synchronization between tests is maintained by using
lockfilesDBE
Linux SSH NFS Perl lockfiles
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How does the DBE setup the environment?
• Most path information is updated using the ~/.ssh/environment file
• Some custom environment variables are set by DBE scripts on individual clients
• Individual Test IDs are assigned to each test• Directories are created on the NFS partition for stats and logs
DBE
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How does the DBE setup the environment?
• Most path information is updated using the ~/.ssh/environment file
• Some custom environment variables are set by DBE scripts on individual clients
• Individual Test IDs are assigned to each test• Directories are created on the NFS partition for stats and logs
DBE
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How does the DBE setup the environment?
• Most path information is updated using the ~/.ssh/environment file
• Some custom environment variables are set by DBE scripts on individual clients
• Individual Test IDs are assigned to each test• Directories are created on the NFS partition for stats and logs
DBE
Change $ENV
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How does the DBE setup the environment?
• Most path information is updated using the ~/.ssh/environment file
• Some custom environment variables are set by DBE scripts on individual clients
• Individual Test IDs are assigned to each test• Directories are created on the NFS partition for stats and logs
DBE
Change $ENV
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How does the DBE setup the environment?
• Most path information is updated using the ~/.ssh/environment file
• Some custom environment variables are set by DBE scripts on individual clients
• Individual Test IDs are assigned to each test• Directories are created on the NFS partition for stats and logs
DBE
Change $ENV Generate ID
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How does the DBE setup the environment?
• Most path information is updated using the ~/.ssh/environment file
• Some custom environment variables are set by DBE scripts on individual clients
• Individual Test IDs are assigned to each test• Directories are created on the NFS partition for stats and logs
DBE
Change $ENV Generate ID
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How does the DBE setup the environment?
• Most path information is updated using the ~/.ssh/environment file
• Some custom environment variables are set by DBE scripts on individual clients
• Individual Test IDs are assigned to each test• Directories are created on the NFS partition for stats and logs
DBE
Change $ENV Generate ID Create Directories
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How does the DBE setup the environment?
• Publishers and subscribers are notified of test settings– Result file locations– QoS settings on a per subscriber basis– Network settings– Test specific settings (number of messages to send, etc.)
DBE
Repos Publishers Subscribers
Pass Test Info
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What problems had to be dealt with?
• Lack of a terminal with remote command execution with SSH• TCP and UDP buffer sizes were too small
• Synchronization amongst publishers and subscribers
Subscriber
Subscriber
PublisherW
ait
PublisherBuffer
PublisherBuffer
Next Test
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What problems had to be dealt with?
• Flock() doesn’t work as expected with stateless NFS
• Shared libraries are referenced locally• Block buffering of stdout
flock(“myfile”) touch(“myfile.lock”)
stdout
stderr
file
fileimmediate
block buffering
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What problems had to be dealt with?
• More problems on request ;)
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Create Publisher
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Create Publisher
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher
Create Publisher
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher
Create Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher
Create Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber
Create Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber
Create Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber
Create Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber Subscriber
Create Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber Subscriber
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber Subscriber
KillSubscriber 1
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber Subscriber
KillSubscriber 1
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber
KillSubscriber 1
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber
KillSubscriber 1
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What features will be added?
• New tests will require new features• One such feature is per node scripting of subscribers and
publishers• Feature will allow dynamic starting and stopping of
participantsDBE
Publisher Subscriber
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What other additions are planned?
• The ability to launch logging services– Memory and CPU usage will need to be recorded
• The ability to test other middleware and applications
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Demonstration
Primer messages = 100Stats messages = 1000Test type = throughputImplementation = NDDS
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Conclusion and Wrap Up
• The DBE is an excellent suite of tools for automating DDS testing on a networked environment
• New test types will be added to gain further insight into the DDS implementations
• Many new features will also be added to better reveal problems and benefits of the various DDS products
• We would like to thank our AFRL and Vanderbilt Sponsors for their continued support
