[Bug testsuite/4696] New: profile.exp fails with "probe overhead exceeded threshold" error message

[Bug testsuite/4696] New: profile.exp fails with "probe overhead exceeded threshold" error message

[srinivasa at in dot ibm dot com]

My environment is Systemtap-20070623 snapshot,elfutils-0.125 and kernel-2.6.22-rc5.

When I executed this week tests, I got this error message on execution of
profile.exp. Error message tells that system has spent more than
STP_OVERLOAD_THRESHOLD cycles of time on this probe.
=================================
Running
/home/systemtap/tmp/stap_testing_200706250605/src/testsuite/systemtap.samples/profile.exp
...
ERROR: probe overhead exceeded threshold^M
WARNING: Number of errors: 1, skipped probes: 0^M
FAIL: profile
testcase
/home/systemtap/tmp/stap_testing_200706250605/src/testsuite/systemtap.samples/profile.exp
completed in 15 seconds
===============================

I tried to reexucute the same test individually but problem didn't get
reproduced. Is some race involved with this??

-- 
           Summary: profile.exp fails with "probe overhead exceeded
                    threshold" error message
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: testsuite
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: srinivasa at in dot ibm dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=4696

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[Bug testsuite/4696] profile.exp fails with "probe overhead exceeded threshold" error message

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2008-03-18 02:15 -------
I see no dejazilla entries, and recall seeing no recent reports on the mailing
list, of this test failing.  Let's reopen if it reoccurs.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WORKSFORME


http://sourceware.org/bugzilla/show_bug.cgi?id=4696

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[Bug testsuite/4696] profile.exp fails with "probe overhead exceeded threshold" error message

[ankita at in dot ibm dot com]

------- Additional Comments From ankita at in dot ibm dot com  2008-04-14 12:44 -------
Systemtap version am using: Systemtap-20070411 (Latest April build)
elfutils-0.131 kernel: 2.6.24.4-rt4. I am seeing the following errors:

ERROR: probe overhead exceeded threshold
WARNING: Number of errors: 1, skipped probes: 10

As a workaround, I am now invoking the script using the following cmdline:

#stap -vvv xyz.stp -D MAXTRYLOCK=1000 -D MAXSKIPPED=40000 -D TRYLOCKDELAY=10000

Note that if TRYOCKDELAY is removed from the cmdline, the stap still throws the
error. 

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=4696

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