Bug 101776
| Summary: | many floating point assist faults as web pages visited | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux Beta | Reporter: | James D. Howard <jhoward> |
| Component: | mozilla | Assignee: | Christopher Aillon <caillon> |
| Status: | CLOSED CANTFIX | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | medium | ||
| Version: | AS-beta1 | CC: | notting |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | ia64 | ||
| OS: | Linux | ||
| URL: | http://www.redhat.com | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2007-06-09 23:03:03 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: | |||
Red Hat Enterprise Linux 3.0 beta 1 2.4.21-1.1931.2.349.2.2.ent We get similar messages while running a FE simulation code called Abaqus/Standard. We feel that this leads to lot of performance issues of our program. Can some one suggest a fix for this? Re-compiling the source code is not an option (not in our hand) Sridharan Red Hat Linux is no longer supported by Red Hat, Inc. If you are still running Red Hat Linux, you are strongly advised to upgrade to a current Fedora Core release or Red Hat Enterprise Linux or comparable. Some information on which option may be right for you is available at http://www.redhat.com/rhel/migrate/redhatlinux/. Red Hat apologizes that these issues have not been resolved yet. We do want to make sure that no important bugs slip through the cracks. Please check if this issue is still present in a current Fedora Core release. If so, please change the product and version to match, and check the box indicating that the requested information has been provided. Note that any bug still open against Red Hat Linux by the end of 2006 will be closed as 'CANTFIX'. Thanks again for your help. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux ia64; en-US; rv:1.4) Gecko/20030709 Description of problem: system log (viewed with 'dmesg') shows lots/repeated floating-point assist faults as mozilla browser (mozilla-bin) runs. (Often this is a case of algorithms that generate and try to use IEEE floating point denormals.) Specifying flush-to-zero-upon-denormal on iA64 - either as a compile option or as a floating point control setting - will reduce or eliminate these time-consuming faults. dmesg logged messages (q.v.) seem to identify a small number of oft-visited locations in code that are generating/consuming the denormals: 200000000015d291 200000000015d301 2000000000c90b01 2000000000c90b31 Version-Release number of selected component (if applicable): mozilla-1.4-3.0.11 How reproducible: Always Steps to Reproduce: 1. Install mozilla, set up needed proxys and visit some pages 2. Use "dmesg" or like to view system log, looking for "floating-point assist fault" messages 3. The messages include the IP at the offending fault Actual Results: messages in the message log, fp assist fault count in CPU goes up Expected Results: no messages, no time-consuming fault handling Additional info: