test: add a default benchmark for measuring baselines. by arpan14 · Pull Request #2739 · googleapis/java-spanner

arpan14 · 2023-11-23T05:31:29Z

Adding a benchmark (along with usual considerations) for measuring the latencies of some Java Client APIs. For any new feature, we usually first define the baseline by running benchmarks (without the feature).
Adding few utility methods to measure the p99/p95/p50 latencies.
Added benchmarking best-practices to avoid hotspot (by randomising keys), avoid cold start, etc.

…od while retrying exceptions in unit tests. * For details on issue see - googleapis#2206

fix: prevent illegal negative timeout values into thread sleep() method while retrying exceptions in unit tests.

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google-cloud-spanner/src/test/java/com/google/cloud/spanner/BenchmarkingDataLoaderUtility.java

google-cloud-spanner/src/test/java/com/google/cloud/spanner/DefaultBenchmark.java

google-cloud-spanner/src/test/java/com/google/cloud/spanner/BenchmarkingUtilityTest.java

olavloite · 2024-02-29T11:25:21Z

google-cloud-spanner/src/test/java/com/google/cloud/spanner/BenchmarkingUtilityTest.java

+public class BenchmarkingUtilityTest {
+
+  @ClassRule
+  public static IntegrationTestEnv env = new IntegrationTestEnv();


Is this used anywhere?

olavloite · 2024-02-29T11:30:35Z

google-cloud-spanner/src/test/java/com/google/cloud/spanner/DefaultBenchmark.java

+   * <p>Some read requests will be long-running and will cause session leaks. Such sessions will be
+   * removed by the session maintenance background task if SessionPool Option
+   * ActionOnInactiveTransaction is set as WARN_AND_CLOSE.
+   *
+   * <p>Some write requests will be long-running. The test asserts that no sessions are removed by
+   * the session maintenance background task with SessionPool Option ActionOnInactiveTransaction set
+   * as WARN_AND_CLOSE. This is because PDML writes are expected to be long-running.


copy-paste error?

Yes, removed.

olavloite · 2024-02-29T11:32:17Z

google-cloud-spanner/src/test/java/com/google/cloud/spanner/DefaultBenchmark.java

+      final BenchmarkState server, int numberOfOperations) {
+    List<Duration> results = new ArrayList<>(numberOfOperations);
+    // Execute one update to make sure everything has been warmed up.
+    executeUpdate(server);


Shouldn't this also call executeWarmup, so the number of warmup queries is respected for updates as well?

Yes, added this.

olavloite · 2024-02-29T11:34:40Z

google-cloud-spanner/src/test/java/com/google/cloud/spanner/BenchmarkingUtilityTest.java

+   * <p>Table schema used here: CREATE TABLE FOO ( id INT64 NOT NULL, BAZ INT64, BAR INT64, )
+   * PRIMARY KEY(id);
+   */
+  @Test


Do we want this as an actual test that is executed during (nightly?) builds? If so, it should verify that the test actually succeeds by adding at least one assertion.

Or would it make more sense to move this method to the actual benchmark class, so it can more easily be executed together with a benchmark?

I had annotated BenchmarkingUtilityTest with @Category(SlowTest.class). This will make sure its excluded from our pre-submits and nightly tests. Note that the data loading utility is a one time activity and does not need to be executed repeatedly along with the benchmarks. Hence, I think it will be better to leave this as separate standalone class.

I have now moved the latency reporting utility methods (printResults, percentile, etc.) to a new class AbstractLatencyBenchmark. Any benchmark that aims to report latencies can extend AbstractLatencyBenchmark and get this methods.

I am renaming this class to BenchmarkingUtilityScripts and it now only has the data loading functionality. Avoiding Test in the class name will ensure it does not qualify for any continuous tests.

…nchmarkingUtilityTest.java Co-authored-by: Knut Olav Løite <koloite@gmail.com>

olavloite

LGTM

olavloite · 2024-03-01T18:45:23Z

google-cloud-spanner/src/test/java/com/google/cloud/spanner/DefaultBenchmark.java

@@ -55,17 +54,17 @@
 * <p>Below are a few considerations here: 1. We use all default options for this test because that


super-nit (feel free to leave as is): Use <ol> and <li> tags to create an actual ordered (numbered) list.

arpan14 and others added 12 commits February 8, 2023 12:22

fix: prevent illegal negative timeout values into thread sleep() meth…

edc5bbf

…od while retrying exceptions in unit tests. * For details on issue see - googleapis#2206

Merge pull request #1 from arpan14/retryerror

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fix: prevent illegal negative timeout values into thread sleep() method while retrying exceptions in unit tests.

Fixing lint issues.

4cd497b

Merge branch 'googleapis:main' into main

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Merge branch 'googleapis:main' into main

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Merge branch 'googleapis:main' into main

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Merge branch 'googleapis:main' into main

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Merge branch 'googleapis:main' into main

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Merge branch 'googleapis:main' into main

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Merge branch 'googleapis:main' into main

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Merge branch 'googleapis:main' into main

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test: add a default benchmark for measuring baselines.

cd6c20c

arpan14 requested a review from a team November 23, 2023 05:31

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olavloite reviewed Nov 24, 2023

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arpan14 added 2 commits February 26, 2024 16:56

chore: address PR comments.

8de3b20

chore: address comments.

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arpan14 requested a review from olavloite February 27, 2024 10:07

Merge branch 'main' into latency-benchmark-utils

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olavloite reviewed Feb 29, 2024

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arpan14 and others added 2 commits March 1, 2024 23:21

Update google-cloud-spanner/src/test/java/com/google/cloud/spanner/Be…

e3548bd

…nchmarkingUtilityTest.java Co-authored-by: Knut Olav Løite <koloite@gmail.com>

chore: resolve PR comments.

ebda762

arpan14 requested a review from olavloite March 1, 2024 18:14

olavloite approved these changes Mar 1, 2024

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arpan14 deleted the latency-benchmark-utils branch March 2, 2024 15:36

		@@ -55,17 +54,17 @@
		* <p>Below are a few considerations here: 1. We use all default options for this test because that

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arpan14 commented Nov 23, 2023 •

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