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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [llvm-exegesis] All benchmarks of the same opcode should be within eps of eachanother."
href="https://bugs.llvm.org/show_bug.cgi?id=40787">40787</a>
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<th>Summary</th>
<td>[llvm-exegesis] All benchmarks of the same opcode should be within eps of eachanother.
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>llvm-exegesis
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>lebedev.ri@gmail.com
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<th>CC</th>
<td>clement.courbet@gmail.com, gchatelet@google.com, llvm-bugs@lists.llvm.org
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<pre>A follow up for <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [llvm-exegesis] If the same instruction lies in multiple clusters, it's noise"
href="show_bug.cgi?id=40715">https://bugs.llvm.org/show_bug.cgi?id=40715</a>
I'm not sure if this is working as intended or not, but the current clustering
code may still end up clustering together benchmark points that are different.
I.e. after clustering, given a cluster, the points within that cluster may
be more offset from each another than the `-analysis-epsilon=`.
This might be a bug in itself Is it?
If not, i believe i will need to introduce an early stabilization sweep,
i.e. go through all the points, create a [opcode]=>{p0, ...} mapping,
and then go through each opcode in that map, and if there is more than one
point for an opcode, verify that every combination (every 2 points)
of these points is `isNeighbour()`. If not, add all these points for
this opcode into a new unstable cluster.
Thus, the normal clustering logic will skip them.</pre>
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