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Mark Price

In my last couple of posts, I’ve been looking at how UDP network packets are received by the Linux kernel. While diving through the source code, it has been shown that there are a number of statistics available for monitoring receive errors, buffer ove…

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Luke Bigum

Luke Bigum

In this series we are attempting to solve a clock synchronisation problem to a degree of accuracy in order to satisfy MiFID II regulations, and we’re trying to do it without spending a lot of money.

So far we have:

  1. Talked about the regulations and how we might solve this with Linux software
  2. Built a “PTP Bridge” with Puppet
  3. Started recording metrics with collectd and InfluxDB, and
  4. Finished recording metrics
  5. Drawn lots of graphs with Grafana and found contention on our firewall
  6. Tried a dedicated firewall for PTP

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Thomas Johnson

Last time we implemented a minimal detector, and I presented the code for the detector as a fait accompli. Let’s take a closer look at it.   import java.nio.file.Files; import edu.umd.cs.findbugs.BugInstance; import edu.umd.cs.findbugs.BugReporter; import edu.umd.cs.findbugs.BytecodeScanningDetector; import edu.umd.cs.findbugs.classfile.ClassDescriptor; import edu.umd.cs.findbugs.classfile.DescriptorFactory; import edu.umd.cs.findbugs.classfile.MethodDescriptor; public class FilesLinesDetector extends BytecodeScanningDetector { private static final ClassDescriptor JAVA_NIO_FILES = DescriptorFactory.createClassDescriptor(Files.class); final… More How To Find Bugs, Part 2: Well, this is somewhat confusing and frustrating

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Thomas Johnson

Findbugs is an incredibly powerful tool, and it supports running of custom detectors. However, the API for writing custom detectors is not well documented, at least as far as I’ve been able to find. So, as I started writing detectors, I’ve been working primarily off a process of trial and error. It’s likely there are… More How To Find Bugs, Part 1: A Minimal Bug Detector

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