[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-09-01 Thread jo . alen1
https://bugs.kde.org/show_bug.cgi?id=492348 --- Comment #5 from jo.al...@outlook.com --- (In reply to Sam James from comment #4) > For what it's worth, some advice when making these reports (as a maintainer, > but not of Valgrind): > * Don't rely on screenshots. It has a certain smell but also, n

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-09-01 Thread Sam James
https://bugs.kde.org/show_bug.cgi?id=492348 --- Comment #4 from Sam James --- For what it's worth, some advice when making these reports (as a maintainer, but not of Valgrind): * Don't rely on screenshots. It has a certain smell but also, not everyone can even see screenshots (e.g. screenreader u

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-09-01 Thread Sam James
https://bugs.kde.org/show_bug.cgi?id=492348 Sam James changed: What|Removed |Added CC||s...@gentoo.org -- You are receiving this mail bec

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-09-01 Thread Sam James
https://bugs.kde.org/show_bug.cgi?id=492348 Sam James changed: What|Removed |Added See Also||https://bugs.kde.org/show_b |

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-09-01 Thread Sam James
https://bugs.kde.org/show_bug.cgi?id=492348 Sam James changed: What|Removed |Added See Also||https://bugs.kde.org/show_b |

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-09-01 Thread Sam James
https://bugs.kde.org/show_bug.cgi?id=492348 Sam James changed: What|Removed |Added See Also||https://bugs.kde.org/show_b |

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-09-01 Thread Sam James
https://bugs.kde.org/show_bug.cgi?id=492348 Sam James changed: What|Removed |Added See Also||https://bugs.kde.org/show_b |

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-08-31 Thread jo . alen1
https://bugs.kde.org/show_bug.cgi?id=492348 --- Comment #3 from jo.al...@outlook.com --- (In reply to Paul Floyd from comment #1) > Is the test exe totally deterministic? > > An example of non-determinism is a threaded application that uses spinlocks. > The number of CPU instructions spent in th

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-08-29 Thread Paul Floyd
https://bugs.kde.org/show_bug.cgi?id=492348 --- Comment #2 from Paul Floyd --- 370k instructions is not a lot and most of them are in the link loader. Looks like there is variation in looking for glibc tunables. Can you be certain that for both runs the environment variables are strictly identica

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-08-29 Thread Paul Floyd
https://bugs.kde.org/show_bug.cgi?id=492348 --- Comment #1 from Paul Floyd --- Is the test exe totally deterministic? An example of non-determinism is a threaded application that uses spinlocks. The number of CPU instructions spent in the spins will vary from run to run. We can’t do much with j

[valgrind] [Bug 492348] Detected nondeterminism in cachegrind reports

2024-08-29 Thread Paul Floyd
https://bugs.kde.org/show_bug.cgi?id=492348 Paul Floyd changed: What|Removed |Added CC||pjfl...@wanadoo.fr -- You are receiving this mail