Bug 241373
| Summary: | ltp test gettimeofday02 fails: "Time is going backwards" | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Zing <zing> | ||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||
| Status: | CLOSED NEXTRELEASE | QA Contact: | Brian Brock <bbrock> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 6 | CC: | jonstanley | ||||
| 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: | 2008-01-08 03:42:40 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: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 427887 | ||||||
| Attachments: |
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Created attachment 155459 [details]
dmesg output
Try using a different clock source. I get: $ ./gettimeofday02 gettimeofday02 0 INFO : checking if gettimeofday is monotonous, takes 30s gettimeofday02 1 PASS : gettimeofday monotonous in 30 seconds $ uname -rmp 2.6.20-1.2962.fc6 x86_64 x86_64 My dmesg: time.c: Using 14.318180 MHz WALL HPET GTOD HPET/TSC timer. Yours says: time.c: Using 3.579545 MHz WALL PM GTOD PIT/TSC timer. Yes, that helped... clocksource of acpi_pm worked for me. (This is a mass-update to all current FC6 kernel bugs in NEW state) Hello, I'm reviewing this bug list as part of the kernel bug triage project, an attempt to isolate current bugs in the Fedora kernel. http://fedoraproject.org/wiki/KernelBugTriage I am CC'ing myself to this bug, however this version of Fedora is no longer maintained. Please attempt to reproduce this bug with a current version of Fedora (presently Fedora 8). If the bug no longer exists, please close the bug or I'll do so in a few days if there is no further information lodged. Thanks for using Fedora! F8 on a different blade, same type of hardware: Time: tsc clocksource has been installed. # uname -rmp 2.6.23.9-85.fc8 x86_64 x86_64 # ./gettimeofday02 gettimeofday02 0 INFO : checking if gettimeofday is monotonous, takes 30s gettimeofday02 1 PASS : gettimeofday monotonous in 30 seconds |
Description of problem: the gettimeofday02 ltp test fails: # ./gettimeofday02 gettimeofday02 0 INFO : checking if gettimeofday is monotonous, takes 30s gettimeofday02 1 FAIL : Time is going backwards: old 1180105299.114454 vs new 1180105299.114453! Version-Release number of selected component (if applicable): Fedora Core 6 x86_64 on an intel xeon dual processor blade (8843-E9U) in an IBM Bladecenter H (8852-4XU) kernel-2.6.20-1.2948.fc6.x86_64 How reproducible: all the time on every gettimeofday02 run. Steps to Reproduce: 1. compile gettimeofday02.c from the ltp test suite 2. run it Additional Info: # cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 0: 5304769 0 0 0 IO-APIC-edge timer 8: 0 0 0 0 IO-APIC-edge rtc 11: 0 0 0 0 IO-APIC-fasteoi acpi 16: 126505 11095 0 0 IO-APIC-fasteoi uhci_hcd:usb1 19: 0 0 0 0 IO-APIC-fasteoi uhci_hcd:usb2 24: 40656 33052 190008 0 IO-APIC-fasteoi ioc0 77: 102 0 54603 874 IO-APIC-fasteoi eth0 NMI: 0 0 0 0 LOC: 5303930 5303872 5303797 5303221 ERR: 0