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by RoyLongbottom
Wed Nov 13, 2019 10:52 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Raspberry Pi 4B 64 Bit Stress Tests My 64 bit stress testing programs have now been run on Gentoo controlled Pi 4B systems, with some variations. They demonstrate the same heating and processor speed variations reported for those tested at 32 bits via Raspbian. The detailed Raspberry Pi 4B 64 Bit B...
by RoyLongbottom
Wed Sep 25, 2019 7:41 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

64 Bit Raspberry Pi 4B Java and I/O Benchmarks

64 Bit Raspberry Pi 4B Java and I/O Benchmarks The benchmark results included below enable comparisons between the Pi 4B and 3B+, using the same benchmark and system software, but a sample of Pi 4 32 bit speeds is included, in some cases. Three operational differences were observed from the 32 bit ...
by RoyLongbottom
Wed Sep 18, 2019 2:42 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

More 64 Bit Raspberry Pi 4B Multithreading Benchmarks OpenMP-MemSpeed This is the same program as the single core MemSpeed benchmark, but with increased memory sizes and compiled using OpenMP directives. The same program was also compiled without these directives (NotOpenMP-MemSpeed2), with the exa...
by RoyLongbottom
Wed Sep 18, 2019 2:23 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

64 Bit Raspberry Pi 4B Multithreading Benchmarks Many of these benchmarks run using 1, 2, 4 and 8 threads, with others executing programs on all available cores via OpenMP. MP-Whetstone Benchmark Multiple threads each run the eight test functions at the same time, but with some dedicated variables....
by RoyLongbottom
Tue Sep 03, 2019 9:21 pm
Forum: Gentoo
Topic: 64 Bit Gentoo Raspberry Pi 3 Benchmarks
Replies: 6
Views: 13546

Re: 64 Bit Gentoo Raspberry Pi 3 Benchmarks

My first Raspberry Pi 4B benchmark results, via 64 bit Gentoo, are in the following topic:

https://www.raspberrypi.org/forums/view ... 5#p1530497
by RoyLongbottom
Tue Sep 03, 2019 9:00 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

64 Bit Raspberry Pi 4B Benchmarks The Gentoo 64 bit Operating System is now available for the Raspberry Pi 4B from: https://github.com/sakaki-/gentoo-on-rpi-64bit Existing benchmarks were used to provide comparisons with the old Pi 3B+ model and the Pi 4B system using 32 bit Raspbian. Brief reminde...
by RoyLongbottom
Sat Jul 20, 2019 11:49 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Input/Output Stress Test - burnindrive2 This is essentially the same as my program used during hundreds of UK Government and University computer acceptance trials during the 1970s and 1980s, with some significant achievements. Burnindrive writes four files, using 164 blocks of 64 KB, repeated 16 ti...
by RoyLongbottom
Sat Jul 20, 2019 11:35 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Livermore Loops Plus OpenGL Stress Tests (Including Dual Monitors) For more details of stress testing options see: https://www.researchgate.net/publication/334561068_Raspberry_Pi_4B_Stress_Tests_Including_High_Performance_Linpack Three copies of Livermore Loops stress tests were run along with the ...
by RoyLongbottom
Fri Jul 19, 2019 5:46 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

High Performance Linpack (HPL) In 1993, it was found that a precompiled version of High Performance Linpack (HPL) could produce the wrong and inconsistent numeric calculations, also system crashes. For more information see this PDF file at ResearchGate: https://www.researchgate.net/publication/3319...
by RoyLongbottom
Fri Jul 19, 2019 4:26 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

High Performance Linpack (HPL) In 2016, it was found that a precompiled version of High Performance Linpack (HPL) could produce the wrong and inconsistent numeric calculations, also system crashes. For more information see this PDF file at ResearchGate: https://www.researchgate.net/publication/3319...
by RoyLongbottom
Wed Jul 10, 2019 5:34 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Pi 4B Stress Tests First Unstressed Tests - It is quite easy to produce programs that run at high speeds on all cores of a modern computer, be it a PC, tablet, phone or a small board system like the Raspberry Pi. These programs are likely to lead to increased CPU temperatures. Given insufficient co...
by RoyLongbottom
Sat Jun 29, 2019 3:08 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Java and OpenGL The Java benchmarks were run after installing Oracle Java 8, then OpenJDK11 later. Java Whetstone Benchmark Pi 4B performance was nearly as good as the compiled C version. However, there can be wide variations involving new Java versions. Here, the Pi 3B+ overall MWIPS rating was pa...
by RoyLongbottom
Sat Jun 29, 2019 2:05 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

I/O Benchmarks As used previously, variations of the same benchmark can be used to measure performance of local drives and networks, covering writing and reading large and small file and random access. A run time parameter can be used to increase the sizes of the large files. LanSpeed Benchmark - W...
by RoyLongbottom
Fri Jun 28, 2019 8:36 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Multithreading Benchmarks Most of the multithreading benchmarks execute the same calculations using 1, 2, 4 and 8 threads. Quite a few are versions of the single core benchmarks, with similar Pi 4 performance gains. With these, comparisons with PCs becomes more complicated and none are provided. Th...
by RoyLongbottom
Wed Jun 26, 2019 4:15 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Single Core Benchmarks using Data in Caches and RAM The following are brief summaries of details and results. For this information, see the HTM file in Raspberry Pi 4B 32 Bit BenchmarksHTM.zip, attached to the first message of this Raspberry Pi 4 benchmarks topic. https://www.raspberrypi.org/forums...
by RoyLongbottom
Tue Jun 25, 2019 3:39 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Single Core Benchmarks The following provide benchmark results with limited comments on Raspberry Pi 4B performance gains over Pi 3B+ and relative Pi 4B relationships between older ARM V7 and gcc 8 compilations. For the first few, ancient benchmarks, ARM V6 compilations are also compared. Results o...
by RoyLongbottom
Tue Jun 25, 2019 9:02 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Raspberry Pi 4 Benchmarks Did you use a heatsink or fan on the Pi 4 and did it throttle due to heat? I will be producing a report of my stress testing efforts in due course. As with all modern processors (that I have encountered) they will throttle or crash when stretched to the limit, without appr...
by RoyLongbottom
Mon Jun 24, 2019 3:32 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Raspberry Pi 4 Benchmarks I have run all of my relevant benchmarks and stress tests on the new Raspberry Pi 4. The early opportunity to run the programs was due to my acceptance of the request for me to become a volunteer, exercising the system prior to launch. I will be posting results here shortl...
by RoyLongbottom
Wed Apr 24, 2019 6:44 pm
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

New Multithreaded Stress Tests I have produced some new 32 bit and 64 bit stress tests that can use up to 64 threads, each using a dedicated segment of the data. There are three varieties Integer, Single Precision Floating Point and Double Precision Floating Point. Run time parameters include durat...
by RoyLongbottom
Mon Apr 01, 2019 11:15 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Given your confirmation of incorrect results and crashes under load, I wonder how Los Alamos National Labs have been fairing with their cluster of 750 Pi 3B computers. Do you think the pilot project was ever expanded to the envisioned 10,000-node 40,000-core machine? Ideally 10,000 Pi's should prod...
by RoyLongbottom
Fri Mar 29, 2019 11:04 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

High Performance Linpack Benchmark and Stress Tests Along with others in 2016 and later, I found that running the HPL benchmark on the Raspberry Pi 3 could result in incorrect numeric results and system crashes. See: Pi3 incorrect results under load (possibly heat related) https://www.raspberrypi.o...
by RoyLongbottom
Sun Dec 23, 2018 11:28 pm
Forum: Beginners
Topic: RPi 3b performance in DMIPS compared to other Broadcom SOCs.
Replies: 5
Views: 1058

Re: RPi 3b performance in DMIPS compared to other Broadcom SOCs.

DMIPS represents performance measured by a program compiled from standard Dhrystone C code. The only valid comparisons are from the same compilation. My results show significand differences using different compiler releases, including 32 bit vs 64 bit compilations. You should note that the code is n...
by RoyLongbottom
Sat Sep 22, 2018 11:56 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Small Files - Performance did not vary much over the systems tested (using 3B+) If I understand these results correctly, the 3B+ write speeds are faster than the read speeds. This seems consistent with previously reported properties of the 3B+ hardware. Are these benchmarks for SMB/CIFS filesystems...
by RoyLongbottom
Fri Sep 21, 2018 10:55 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Graphics and Input/Output Benchmarks The 32 bit and 64 bit versions of these benchmarks have been run on a 3B+, the latter via Gentoo. Full details, results and 3b+/3B comparisons are provided in the following ResearchGate report: https://www.researchgate.net/publication/327467963_Raspberry_Pi_3B_3...
by RoyLongbottom
Thu Sep 13, 2018 10:45 am
Forum: General programming discussion
Topic: Raspberry Pi Benchmarks
Replies: 145
Views: 97458

Re: Raspberry Pi Benchmarks

Raspberry Pi 3B+ Stress Tests I have finished running my benchmarks on the Raspberry Pi 3B+. A full report is available from ResearchGate: https://www.researchgate.net/publication/327467963_Raspberry_Pi_3B_32_bit_and_64_bit_Benchmarks_and_Stress_Tests?_iepl%5BviewId%5D=RiEmnDoCO1cfHp4h46lXJY4T&_iep...

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