Bug 478380 - Gettimeofday(2) Off-by-one after Settimeofday(2)
Gettimeofday(2) Off-by-one after Settimeofday(2)
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
ia64 Linux
medium Severity high
: rc
: ---
Assigned To: Red Hat Kernel Manager
Martin Jenner
Depends On:
  Show dependency treegraph
Reported: 2008-12-29 02:08 EST by CAI Qian
Modified: 2009-01-05 10:45 EST (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2009-01-05 10:45:53 EST
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
reproducer (1.03 KB, text/plain)
2008-12-29 02:12 EST, CAI Qian
no flags Details

  None (edit)
Description CAI Qian 2008-12-29 02:08:25 EST
Description of problem:
On all (at least 5) IA-64 machines tested, the following test will fail,

curr_time = gettimeofday()
settimeofday (curr_time + 10)
pres_time = gettimeofday()

The result that gettimeofday() returned was one less that we set.

# ./time
curr_time = 1228827598
pres_time = 1228827607

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. run the reproducer
Actual results:
The test failed.

Expected results:
The test should pass.

Additional info:
* I have only seen this on IA-64.
* I have only seen this on RHEL 4.
* RHEL 5 has the same behaviour if using time() instead of gettimeofday.
Bug 475477 - Time(2) Off-by-one after Settimeofday(2)
Comment 1 CAI Qian 2008-12-29 02:12:38 EST
Created attachment 327913 [details]
Comment 2 CAI Qian 2008-12-29 02:40:41 EST
By the way, NTP has been stopped during the test.
Comment 3 Prarit Bhargava 2009-01-05 10:45:53 EST
Since this is RHEL4 ia64, and we're at the end of development, I'm closing this as WONTFIX.


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