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Home→Tags metrics

Tag Archives: metrics

topdown tool – adding support for level 3 backend, rusage

Performance analysis, tools and experiments Posted on 2018-05-25 by mev2018-05-25

I have updated the topdown wrapper script to add some additional cache statistics for level 3 backend related information. I have also added a -x option to display some rusage information.

Continue reading →
Posted in tools | Tagged metrics, top-down | Leave a reply

topdown tool – adding support for level 3 frontend

Performance analysis, tools and experiments Posted on 2018-05-24 by mev2018-05-24

The Intel topdown performance analysis method separates out frontend stalls (level 1) into latency (level 2) and bandwidth (level 2). A frontend latency stall is when 0 uops are issued at all because the frontend is waiting. A frontend bandwidth … Continue reading →

Posted in tools | Tagged metrics, top-down | Leave a reply

topdown tool

Performance analysis, tools and experiments Posted on 2018-05-21 by mev2018-05-21

I have added a basic tool “topdown” that is a wrapper to collect topdown metrics.

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Posted in tools | Tagged metrics, top-down | Leave a reply

Performance counters and memory analysis; checking with pmu_tools

Performance analysis, tools and experiments Posted on 2018-05-17 by mev2018-05-21

After my previous post on backend analysis, I got a chance to look further breaking out backend stall statistics.

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Posted in analysis | Tagged memory, metrics, performance counters, pmu_tools | Leave a reply

wspy – memory analysis for processes; need to sanity check the metrics…

Performance analysis, tools and experiments Posted on 2018-04-29 by mev2018-04-30

As a followup to this post, I’ve implemented per-process capture of backend counters. I can now create a memory report from a process tree.

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Posted in analysis, experiments, tools | Tagged memory, metrics, top-down | Leave a reply

Investigating Intel performance counters for backend memory costing…

Performance analysis, tools and experiments Posted on 2018-04-25 by mev2018-04-25

I’ve implemented the first level for topdown performance counter analysis and also done an initial analysis of ~15 workloads from recent Phoronix article. A logical next step is to expand the “backend bound” category to first separate CPU-bound vs. memory-bound … Continue reading →

Posted in analysis | Tagged analysis technique, memory, metrics, perf, performance counters | Leave a reply

Off CPU analysis, getrusage, wait4 and related techniques…

Performance analysis, tools and experiments Posted on 2018-04-22 by mev2018-04-23

As I looked to analyze x264, I saw that the On CPU metric was considerably less than other benchmarks like openssl or c-ray that are On CPU almost 100% of the time. I also noticed that my Ryzen 1700 box … Continue reading →

Posted in experiments | Tagged analysis technique, metrics, rusage | 1 Reply

wspy – added csv file as well as analysis functions

Performance analysis, tools and experiments Posted on 2018-04-18 by mev2018-04-19

I have updated wspy to dump a “processtable.csv” file at the same time it dumps a “processtable.txt” file. This gives me several advantages: I’ve separated the format of output from collecting instrumentation. Hence, I can run things once to collect … Continue reading →

Posted in tools | Tagged metrics, wspy | Leave a reply

Three basic metrics to assess a workload

Performance analysis, tools and experiments Posted on 2018-04-12 by mev2018-06-08

This article summarizes three overall metrics to assess performance of a workload running on a microprocessor. These metrics provide an overall picture of what determines the performance and provide clues on where to dig for a deeper understanding. Following the … Continue reading →

Posted in workloads | Tagged ipc, metrics, on_core, on_cpu | Leave a reply

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