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[Bug 1001629] New: bsd stack uses wrong timeout values if hz != 100
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: unassigned at bugs dot ecos dot sourceware dot org
- Date: Wed, 25 Jul 2012 08:53:56 +0100
- Subject: [Bug 1001629] New: bsd stack uses wrong timeout values if hz != 100
- Auto-submitted: auto-generated
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Summary: bsd stack uses wrong timeout values if hz != 100
Product: eCos
Version: CVS
Platform: All
OS/Version: All
Status: UNCONFIRMED
Severity: normal
Priority: normal
Component: TCP/IP
AssignedTo: unassigned@bugs.ecos.sourceware.org
ReportedBy: bernd.edlinger@hotmail.de
CC: ecos-bugs@ecos.sourceware.org
Class: Advice Request
Created an attachment (id=1842)
--> (http://bugs.ecos.sourceware.org/attachment.cgi?id=1842)
proposed patch to solve this defect
if the eCos kernel is configured to 1000 IRQ/s all timeouts in the bsd_tcpip
stack expire in 1/10th of the expected time.
For instance all timeouts given with setsockopt(SOL_SOCKET, SO_RCVTIMEO),
which has a potential to break existing TCP/IP applications.
The reason is the wrong assumption that hz is always 100 in the file
"ecos/packages/net/bsd_tcpip/current/src/ecos/support.c".
Attached is a proposed patch to fix this issue
and a similar problem in show_ticks_in_us(),
where it is taken for granted, that the NOMINATOR in
CYGNUM_KERNEL_COUNTERS_RTC_RESOLUTION is always 1000000000 (1E9)
which is also not true in general.
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