Difference between revisions of "SMT profiling with pmcstat and perf"
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This article discusses profiling symmetric multithreading (SMT) on the POWER9 architecture. It uses both Big-endian FreeBSD with pmcstat and Debian with perf. | This article discusses profiling symmetric multithreading (SMT) on the POWER9 architecture. It uses both Big-endian FreeBSD with pmcstat and Debian with perf. | ||
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| + | The knowledge presented here was derived from a variety of sources which can be found in the [[Additional Resources]] section. | ||
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=== Symmetric multithreading (SMT) === | === Symmetric multithreading (SMT) === | ||
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=== perf === | === perf === | ||
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| + | === Additional Resources === | ||
| + | [[:File:POWER9 um OpenPOWER v21 10OCT2019 pub.pdf|POWER9 User Manual v21]] | ||
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| + | [[:File:POWER9_PMU_UG_v12_28NOV2018_pub.pdf|POWER9 Performance Monitoring Unit User Guide v12]] | ||
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| + | George Neville-Neil's brief tutorial on pmcstat: | ||
| + | https://freebsdfoundation.org/wp-content/uploads/2014/03/Understanding-Application-and-System-Performance-with-HWPMC4.pdf | ||
Revision as of 05:23, 15 July 2025
This article discusses profiling symmetric multithreading (SMT) on the POWER9 architecture. It uses both Big-endian FreeBSD with pmcstat and Debian with perf.
The knowledge presented here was derived from a variety of sources which can be found in the Additional Resources section.
Contents
Symmetric multithreading (SMT)
SMT principles
SMT is not "multi-core"
Comparison to RISC-V HARTs
Benchmark code
pmcstat
perf
Additional Resources
POWER9 Performance Monitoring Unit User Guide v12
George Neville-Neil's brief tutorial on pmcstat:
https://freebsdfoundation.org/wp-content/uploads/2014/03/Understanding-Application-and-System-Performance-with-HWPMC4.pdf
