Bug 216700
| Summary: | FFTW3 not fast enough... | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Randy Zagar <zagar> |
| Component: | fftw3 | Assignee: | Quentin Spencer <qspencer> |
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | low | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6 | CC: | extras-qa, opensource |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-01-06 21:49:49 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Imho this is not a bug in Fedora, because there are reasons to use the currently used compiler flags. They work for several cpus, they provide additional security measures and allow easier debugging in case this needs to be done. |
Description of problem: fftw3 is not built with the best-performing compiler flags. The library, as delivered, only provides half the performance indicated on the fftw benchmark page. Version-Release number of selected component (if applicable): fftw-3.1.2-3 Additional info: Compiler flags used on the FFTW benchmark page are: CFLAGS="-m64 -O3 -fomit-frame-pointer -fstrict-aliasing -mtune=k8" FFLAGS="-m64 -O3 -fomit-frame-pointer -fstrict-aliasing"