Podcast
Questions and Answers
What type of data does PerfSpect collect?
What type of data does PerfSpect collect?
- Performance data (correct)
- System stats
- Raw telemetry data
- Programming code
True or false: PerfSpect is a programming language.
True or false: PerfSpect is a programming language.
False (B)
What is the similarity analyzer used for?
What is the similarity analyzer used for?
- To compare performance metrics between different workloads
- To collect performance metrics from Intel hardware
- To compare multiple workloads based on telemetry data (correct)
- To retire workloads that are not waiting for resources
True or false: The online phase of PerfSpect collects application performance metrics.
True or false: The online phase of PerfSpect collects application performance metrics.
How many default files are generated during the offline post-processing phase?
How many default files are generated during the offline post-processing phase?
What can PerfSpect be used for?
What can PerfSpect be used for?
What can PerfSpect be used for?
What can PerfSpect be used for?
True or false: The Metric_out_average file is used to analyze results and deduce insights.
True or false: The Metric_out_average file is used to analyze results and deduce insights.
What does PerfSpect do before being released to the public?
What does PerfSpect do before being released to the public?
What type of hardware does PerfSpect use to collect PMU data?
What type of hardware does PerfSpect use to collect PMU data?
What are workloads that are more frontend or backend bound clustered in?
What are workloads that are more frontend or backend bound clustered in?
True or false: The 3rd Gen Intel® Xeon® Scalable processor has four general programmable counters.
True or false: The 3rd Gen Intel® Xeon® Scalable processor has four general programmable counters.
What is the Umask filter used for?
What is the Umask filter used for?
True or false: The Umask filter was extended to 64-bit in the 4th Gen Intel® Xeon® Scalable processor.
True or false: The Umask filter was extended to 64-bit in the 4th Gen Intel® Xeon® Scalable processor.
What is PerfSpect?
What is PerfSpect?
How many fixed counters does the 3rd Gen Intel® Xeon® Scalable processor have?
How many fixed counters does the 3rd Gen Intel® Xeon® Scalable processor have?
What is the most used file to analyze results and deduce insights?
What is the most used file to analyze results and deduce insights?
What is the purpose of PerfSpect?
What is the purpose of PerfSpect?
What does PerfSpect require for use?
What does PerfSpect require for use?
What type of processor does the Umask filter extend to?
What type of processor does the Umask filter extend to?
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Study Notes
- PerfSpect is a telemetry tool that collects performance data from your workload or application on your production servers.
- PerfSpect is lightweight and can be used without any need for programming.
- PerfSpect uses perf drivers to collect PMU data from Intel® hardware.
- PerfSpect can be used to characterize your workload or application and identify potential bottlenecks.
- PerfSpect can be used to post-process raw telemetry data to generate insights into your application's performance.
- PerfSpect is a performance analysis tool that collects raw telemetry data from the processor microarchitecture.
- The online phase collects system stats, and the offline post-processing phase converts the raw telemetry data to more readable performance metrics.
- There are three default files generated during the offline post-processing phase: Metric_out is a time series dump of all the metrics calculated, Metric_out_average is the most used file to analyze results and deduce insights, and Metric_out_p95 is a 95th percentile file to analyze results.
- The 3rd Gen Intel® Xeon® Scalable processor has four fixed counters, which frees up the scarce general programmable counters to reduce the number of groups needed to collect telemetry for a certain metric.
- The Umask filter was extended to 64-bit in the 3rd Gen Intel® Xeon® Scalable processor.
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