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A Declarative Approach for Performance Tests Execution in Continuous Software Development Environments

The document discusses a declarative approach to performance testing in continuous software development environments, emphasizing the need for clear test goals and automation. It introduces the BenchFlow framework, enabling declarative performance testing through a model-driven approach for defining test metrics, configurations, and execution lifecycles. Future work aims to apply the method in real-world scenarios and enhance integration with other frameworks.

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Università della Svizzera italiana A Declarative Approach for Performance Tests Execution in Continuous Software Development Environments Vincenzo Ferme Software Institute Faculty of Informatics USI Lugano, Switzerland Cesare Pautasso
2 Repo Continuous Software Development Environments Developers, Testers, Architects
2 CI ServerRepo Continuous Software Development Environments Developers, Testers, Architects
2 CI ServerRepo Continuous Software Development Environments Developers, Testers, Architects
2 CI ServerRepo Continuous Software Development Environments Developers, Testers, Architects Continuous Changes
2 CI ServerRepo Continuous Software Development Environments Developers, Testers, Architects Continuous Changes Continuous Test Execution
3 CI ServerRepo Continuous Software Development Environments Developers, Testers, Architects Continuous Changes Continuous Test Execution Load Test, Spike Test
3 CI ServerRepo Continuous Software Development Environments Developers, Testers, Architects Continuous Changes Continuous Test Execution Capacity Test Configuration Test Load Test, Spike Test
State of Practice 4 Script/UI Based End-to-end Tests against REST APIs
State of Practice 4 Script/UI Based Integrated in CI Pipelines End-to-end Tests against REST APIs
State of Practice 4 Script/UI Based Integrated in CI Pipelines Performance Tests Execution Automation Google Vizier AutoPerf DataMill CloudPerf End-to-end Tests against REST APIs
Define a Configuration Test 5 Test Definition
Define a Configuration Test 5 Test Definition Configuration Parameters Change Simulated Users
Define a Configuration Test 5 Test Definition Configuration Parameters Change Simulated Users System Under Test 3rd-party tools
Define a Configuration Test 5 Test Definition Configuration Parameters Change Simulated Users System Under Test 3rd-party tools Test Execution, Data Collection, Metrics Computation
Define a Configuration Test 5 Test Definition Configuration Parameters Change Simulated Users System Under Test 3rd-party tools Test Execution, Data Collection, Metrics Computation Test Goals are not Explicit in the Definition
Define a Configuration Test 5 Test Definition Configuration Parameters Change Simulated Users System Under Test 3rd-party tools Test Execution, Data Collection, Metrics Computation N o Sem antic V alidation (Runtim e Errors) Test Goals are not Explicit in the Definition
Define a Configuration Test 5 Test Definition Configuration Parameters Change Simulated Users System Under Test 3rd-party tools Test Execution, Data Collection, Metrics Computation N o Sem antic V alidation (Runtim e Errors) Scarce Visibility and Control on the Test Execution Lifecycle Test Goals are not Explicit in the Definition
Declarative Performance Engineering (DPE) 6 “Enabling the performance analyst to declaratively specify what performance-relevant questions need to be answered without being concerned about how they should be answered. ” [Walter et al.] Jürgen Walter, André van Hoorn, Heiko Koziolek, Dusan Okanovic, and Samuel Kounev. Asking ”What”?, Automating the ”How”? -TheVision of Declarative Performance Engineering. In Proc. of ICPE 2016. 91–94. [Walter et al.]
Declarative Performance Engineering (DPE) 6 “Enabling the performance analyst to declaratively specify what performance-relevant questions need to be answered without being concerned about how they should be answered. ” [Walter et al.] Jürgen Walter, André van Hoorn, Heiko Koziolek, Dusan Okanovic, and Samuel Kounev. Asking ”What”?, Automating the ”How”? -TheVision of Declarative Performance Engineering. In Proc. of ICPE 2016. 91–94. [Walter et al.] Developers, Testers, Architects, Performance Analyst …
DPE: Approaches for Performance Testing 7 [Omar et al.] Towards an automated approach to use expert systems in the performance testing of distributed systems. [Westermann] [Scheuner et al.][Omar et al.] “Enabling the performance analyst to declaratively specify what performance-relevant questions need to be answered without being concerned about how they should be answered. ”[Walter et al.] [Westermann] Deriving Goal-oriented Performance Models by Systematic Experimentation [Scheuner et al.] Cloud Work Bench - Infrastructure-as-Code Based Cloud Benchmarking.
Our Proposal: BenchFlow 8 Declarative 
 Performance Testing DSL
Our Proposal: BenchFlow 8 Declarative 
 Performance Testing DSL Model-driven Framework
Our Proposal: BenchFlow 8 Declarative 
 Performance Testing DSL Model-driven Framework https://github.com/benchflow
BenchFlow: Elements of a Test 9 Test Definition
BenchFlow: Elements of a Test 9 Test Definition SUT Configuration and Deployment
Declarative Test Definition 10 configuration: goal: load_function: quality_gates: termination_criteria: data_collection: workload: sut:
11 configuration: goal: type: configuration observe: exploration: … Goal Definition (Configuration Test)
Observed Metrics 12 service_A service_B API_1 … goal: type: configuration observe: workload: API_1: - 90thp_response_time services: service_A: - cpu_avg service_B: - ram_avg …
Exploration Space 13 service_A service_B API_1 … goal: type: configuration exploration: exploration_space: service_A: resources: - memory: range: 1GB... 5GB step: +1GB - cpus: range: 0.1…0.5 - replicas: 1…4 environment: - SIZE_OF_THREADPOOL: range: 5...100 step: +5 …
14 Load Function … goal: load_function: users: 1000 ramp_up: 30s steady_state: 10m ramp_down: 30s … Faban
15 Quality Gates service_A service_B API_1 … goal: quality_gates: workload: API_1: 90thp_response_time: <= 250ms services: service_A: cpu_avg: <= 70% …
16 Termination Criteria … goal: termination_criteria: test: max_time: 3h failed_experiments: 30% …
17 Data Collection … data_collection: client_side: faban: interval: 1s server_side: service_A: resource mysql: environment: SETTING_A : example_setting service_B: - logs - resource … service_A service_B API_1
18 Workload service_A service_B API_1 … workload: <name_of_the_workload>: driver_type: "http" popularity: 100%
 inter_operation_timings: "uniform"
 operations: - … mix: - … … Faban
19 System Under Test Deployment service_A service_B API_1 … sut: configuration: target_service: name: service_A endpoint: / sut_ready_log_check: "Started in (.*)" deployment: service_A: server_1 service_B: server_2 …
19 System Under Test Deployment service_A service_B API_1 … sut: configuration: target_service: name: service_A endpoint: / sut_ready_log_check: "Started in (.*)" deployment: service_A: server_1 service_B: server_2 … https://bit.ly/2EBNrDu
BenchFlow Model-driven Framework 20 CI ServerRepo BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow
BenchFlow Model-driven Framework 20 CI ServerRepo BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow
BenchFlow Model-driven Framework 20 CI ServerRepo BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow
Model-driven Framework Experiment Execution ExplorationExecutionAnalysis Test YAML + SUT Deployment Metrics Failures Result Analysis Goal Exploration Experiment Generation Experiment YAML + SUT Deployment Success Execution 21
Model-driven Framework Experiment Execution ExplorationExecutionAnalysis Test YAML + SUT Deployment Metrics Failures Result Analysis Goal Exploration Experiment Generation Experiment YAML + SUT Deployment Success Execution 21
Test Execution Lifecycle 22 Terminated Running Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle [can reach goal] [cannot reach goal] user terminated OR [max_time] Goal Reached Completed with Failure experiment results available [experiments remaining] [all experiments executed] Partially Complete [number_of_experiments] Validate Termination Criteria Terminating Check Quality Gates [quality gates pass] [failed quality gates]
23 Running Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle experiment results available [experiments remaining] [all experiment Terminating [quality gates pass] [failed qu Test Execution Lifecycle
23 Running Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle experiment results available [experiments remaining] [all experiment Validate Termination Criteria Terminating Check Quality Gates [quality gates pass] [failed qu Test Execution Lifecycle
23 Handle Experiment Result Determine and Execute Experiments: Experiment Life Cycle [can reach goal] [cannot reach goal experiment results available [all experiment [number_of_experimen Validate Termination Criteria Check Quality Gates [quality gates pass] [failed qu Test Execution Lifecycle
23 Termi iment Result d Execute Experiment ycle [can reach goal] [cannot reach goal] Goal Re Completed w experiment results available remaining] [all experiments executed] Partially [number_of_experiments] ate ation ria Check Quality Gates [quality gates pass] [failed quality gates] Test Execution Lifecycle
23 Terminated [cannot reach goal] Goal Reached Completed with Failure [all experiments executed] Partially Complete umber_of_experiments] ality Gates [failed quality gates] Test Execution Lifecycle
23 Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle [can reach goal] OR [max_ experiment results available [experiments remaining] [all experiments execut Validate Termination Criteria Terminating Check Quality Gates [quality gates pass] [failed quality ga Test Execution Lifecycle
23 Terminated ] Goal Reached Completed with Failure ents g] [all experiments executed] Partially Complete [number_of_experiments] Terminating Quality Gates s] [failed quality gates] Test Execution Lifecycle
configuration: goal: type: configuration observe: exploration: … Extending the Proposed Approach 24
configuration: goal: type: stability_boundary observe: exploration: … Extending the Proposed Approach 24 LOAD
 CONFIGURATION
 STABILITY_BOUNDARY Available Goals:
Extending the Proposed Approach 25 Declarative 
 Performance Testing DSL
Terminated Running Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle [can reach goal] [cannot reach goal] user terminated OR [max_time] Goal Reached Completed with Failure experiment results available [experiments remaining] [all experiments executed] Partially Complete [number_of_experiments] Validate Termination Criteria Terminating Check Quality Gates [quality gates pass] [failed quality gates] Extending the Proposed Approach 25 Declarative 
 Performance Testing DSL
Approach: Summary 26 Explicit Test Goals in the Definition
Approach: Summary 26 Explicit Test Goals in the Definition Control on the Test Execution Lifecycle
Approach: Summary 26 Explicit Test Goals in the Definition Control on the Test Execution Lifecycle Terminated Running Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle [can reach goal] [cannot reach goal] user terminated OR [max_time] Goal Reached Completed with Failure experiment results available [experiments remaining] [all experiments executed] Partially Complete [number_of_experiments] Validate Termination Criteria Terminating Check Quality Gates [quality gates pass] [failed quality gates] Visibility on the Test Execution Lifecycle
Approach: Summary 26 Static Syntactic and Semantic Validation Explicit Test Goals in the Definition Control on the Test Execution Lifecycle Terminated Running Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle [can reach goal] [cannot reach goal] user terminated OR [max_time] Goal Reached Completed with Failure experiment results available [experiments remaining] [all experiments executed] Partially Complete [number_of_experiments] Validate Termination Criteria Terminating Check Quality Gates [quality gates pass] [failed quality gates] Visibility on the Test Execution Lifecycle
Approach: Summary 26 Extensible for different Test Goals Static Syntactic and Semantic Validation Explicit Test Goals in the Definition Control on the Test Execution Lifecycle Terminated Running Handle Experiment Result Determine Exploration Strategy Determine and Execute Experiments: Experiment Life Cycle [can reach goal] [cannot reach goal] user terminated OR [max_time] Goal Reached Completed with Failure experiment results available [experiments remaining] [all experiments executed] Partially Complete [number_of_experiments] Validate Termination Criteria Terminating Check Quality Gates [quality gates pass] [failed quality gates] Visibility on the Test Execution Lifecycle
Future Work 27 Apply to real-world use cases:
 - Apply the approach in real-world contexts

Future Work 27 Apply to real-world use cases:
 - Apply the approach in real-world contexts
 Add more goals:
 - Regression
 - Assess different micro services deployment alternatives

Future Work 27 Apply to real-world use cases:
 - Apply the approach in real-world contexts
 Add more goals:
 - Regression
 - Assess different micro services deployment alternatives
 Leverage performance test execution data:
 - Prioritise performance test execution
 - Skip execution of tests

Future Work 27 Apply to real-world use cases:
 - Apply the approach in real-world contexts
 Add more goals:
 - Regression
 - Assess different micro services deployment alternatives
 Leverage performance test execution data:
 - Prioritise performance test execution
 - Skip execution of tests
 Integrate with other frameworks:
 - ContinuITy framework, to leverage production data
State of Practice 4 Script/UI Based Integrated in CI Pipelines Performance Tests Execution Automation Google Vizier AutoPerf DataMill CloudPerf End-to-end Tests against REST APIs State of Practice Highlights 28 Declarative DSL Declarative Test Definition 10 configuration: goal: load_function: quality_gates: termination_criteria: data_collection: workload: sut: Model-driven Framework BenchFlow Model-driven Framework 20 CI ServerRepo BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow BenchFlow Extending the Approach configuration: goal: type: configuration observe: exploration: … configuration: goal: type: stability_boundary observe: exploration: … Extending the Proposed Approach 24 LOAD
 CONFIGURATION
 STABILITY_BOUNDARY Available Goals:

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A Declarative Approach for Performance Tests Execution in Continuous Software Development Environments