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<h3>
David Eichmann pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/5bb80cf2c5601fc57231946c10aee76398b907dd">5bb80cf2</a></strong>
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<span>by David Eichmann</span>
<i>at 2019-05-20T14:41:55Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve test runner logging when calculating performance metric baseline #16662
We attempt to get 75 commit hashes via `git log`, but this only gave 10
hashes in a CI run (see #16662). Better logging may help solve this
error if it occurs again in the future.
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<h4>1 changed file:</h4>
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<a href="#6e9e255267780d64d50e2445aee2360e1269dcf1">
testsuite/driver/perf_notes.py
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<h4>Changes:</h4>
<li id="6e9e255267780d64d50e2445aee2360e1269dcf1">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/5bb80cf2c5601fc57231946c10aee76398b907dd#6e9e255267780d64d50e2445aee2360e1269dcf1"><strong>testsuite/driver/perf_notes.py</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -297,10 +297,19 @@ def baseline_commit_log(commit):</td>
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<pre style="margin: 0;"> <span id="LC297" class="line" lang="python"> <span class="k" style="font-weight: 600;">global</span> <span class="n" style="color: #333;">_baseline_depth_commit_log</span></span>
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<pre style="margin: 0;"> <span id="LC298" class="line" lang="python"> <span class="n" style="color: #333;">commit</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">commit_hash</span><span class="p">(</span><span class="n" style="color: #333;">commit</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC299" class="line" lang="python"> <span class="k" style="font-weight: 600;">if</span> <span class="ow" style="font-weight: 600;">not</span> <span class="n" style="color: #333;">commit</span> <span class="ow" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">_baseline_depth_commit_log</span><span class="p">:</span></span>
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<pre style="margin: 0;">-<span id="LC300" class="line" lang="python"> <span class="n" style="color: #333;">_baseline_depth_commit_log</span><span class="p">[</span><span class="n" style="color: #333;">commit</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> \</span>
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<pre style="margin: 0;">-<span id="LC301" class="line" lang="python"> <span class="n" style="color: #333;">subprocess</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">check_output</span><span class="p">([</span><span class="s" style="color: #d14;">'git'</span><span class="p">,</span> <span class="s" style="color: #d14;">'log'</span><span class="p">,</span> <span class="s" style="color: #d14;">'--format=</span><span class="si" style="color: #d14;">%</span><span class="s" style="color: #d14;">H'</span><span class="p">,</span> \</span>
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<pre style="margin: 0;">-<span id="LC302" class="line" lang="python"> <span class="s" style="color: #d14;">'-n'</span> <span class="o" style="font-weight: 600;">+</span> <span class="nb" style="color: #0086b3;">str</span><span class="p">(</span><span class="n" style="color: #333;">BaselineSearchDepth</span><span class="p">)])</span> \</span>
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<pre style="margin: 0;">-<span id="LC303" class="line" lang="python"> <span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">decode</span><span class="p">()</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">split</span><span class="p">(</span><span class="s" style="color: #d14;">'</span><span class="se" style="color: #d14;">\n</span><span class="s" style="color: #d14;">'</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC300" class="line" lang="python"> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">BaselineSearchDepth</span></span>
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<pre style="margin: 0;">+<span id="LC301" class="line" lang="python"> <span class="n" style="color: #333;">output</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">subprocess</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">check_output</span><span class="p">([</span><span class="s" style="color: #d14;">'git'</span><span class="p">,</span> <span class="s" style="color: #d14;">'log'</span><span class="p">,</span> <span class="s" style="color: #d14;">'--format=</span><span class="si" style="color: #d14;">%</span><span class="s" style="color: #d14;">H'</span><span class="p">,</span> <span class="s" style="color: #d14;">'-n'</span> <span class="o" style="font-weight: 600;">+</span> <span class="nb" style="color: #0086b3;">str</span><span class="p">(</span><span class="n" style="color: #333;">n</span><span class="p">),</span> <span class="n" style="color: #333;">commit</span><span class="p">])</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">decode</span><span class="p">()</span></span>
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<pre style="margin: 0;">+<span id="LC302" class="line" lang="python"> <span class="n" style="color: #333;">hashes</span> <span class="o" style="font-weight: 600;">=</span> <span class="nb" style="color: #0086b3;">list</span><span class="p">(</span><span class="nb" style="color: #0086b3;">filter</span><span class="p">(</span><span class="n" style="color: #333;">is_commit_hash</span><span class="p">,</span> <span class="n" style="color: #333;">output</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">split</span><span class="p">(</span><span class="s" style="color: #d14;">'</span><span class="se" style="color: #d14;">\n</span><span class="s" style="color: #d14;">'</span><span class="p">)))</span></span>
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<pre style="margin: 0;">+<span id="LC303" class="line" lang="python"></span>
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<pre style="margin: 0;">+<span id="LC304" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># We only got 10 results (expecting 75) in a CI pipeline (issue #16662).</span></span>
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<pre style="margin: 0;">+<span id="LC305" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># It's unclear from the logs what went wrong. Since no exception was</span></span>
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<pre style="margin: 0;">+<span id="LC306" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># thrown, we can assume the `git log` call above succeeded. The best we</span></span>
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<pre style="margin: 0;">+<span id="LC307" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># can do for now is improve logging.</span></span>
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<pre style="margin: 0;">+<span id="LC308" class="line" lang="python"> <span class="n" style="color: #333;">actualN</span> <span class="o" style="font-weight: 600;">=</span> <span class="nb" style="color: #0086b3;">len</span><span class="p">(</span><span class="n" style="color: #333;">hashes</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC309" class="line" lang="python"> <span class="k" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">actualN</span> <span class="o" style="font-weight: 600;">!=</span> <span class="n" style="color: #333;">n</span><span class="p">:</span></span>
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<pre style="margin: 0;">+<span id="LC310" class="line" lang="python"> <span class="k" style="font-weight: 600;">print</span><span class="p">(</span><span class="s" style="color: #d14;">"Expected "</span> <span class="o" style="font-weight: 600;">+</span> <span class="nb" style="color: #0086b3;">str</span><span class="p">(</span><span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="o" style="font-weight: 600;">+</span> <span class="s" style="color: #d14;">" hashes, but git gave "</span> <span class="o" style="font-weight: 600;">+</span> <span class="nb" style="color: #0086b3;">str</span><span class="p">(</span><span class="n" style="color: #333;">actualN</span><span class="p">)</span> <span class="o" style="font-weight: 600;">+</span> <span class="s" style="color: #d14;">":</span><span class="se" style="color: #d14;">\n</span><span class="s" style="color: #d14;">"</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">output</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC311" class="line" lang="python"> <span class="n" style="color: #333;">_baseline_depth_commit_log</span><span class="p">[</span><span class="n" style="color: #333;">commit</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hashes</span></span>
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312
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<pre style="margin: 0;">+<span id="LC312" class="line" lang="python"></span>
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304
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313
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<pre style="margin: 0;"> <span id="LC313" class="line" lang="python"> <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">_baseline_depth_commit_log</span><span class="p">[</span><span class="n" style="color: #333;">commit</span><span class="p">]</span></span>
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305
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314
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<pre style="margin: 0;"> <span id="LC314" class="line" lang="python"></span>
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306
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315
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<pre style="margin: 0;"> <span id="LC315" class="line" lang="python"><span class="c1" style="color: #998; font-style: italic;"># Cache of baseline values. This is a dict of dicts indexed on:</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="397" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="406" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -397,7 +406,9 @@ def baseline_metric(commit, name, test_env, metric, way):</td>
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397
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406
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<pre style="margin: 0;"> <span id="LC406" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># Searches through previous commits trying local then ci for each commit in.</span></span>
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398
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407
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<pre style="margin: 0;"> <span id="LC407" class="line" lang="python"> <span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">search</span><span class="p">(</span><span class="n" style="color: #333;">useCiNamespace</span><span class="p">,</span> <span class="n" style="color: #333;">depth</span><span class="p">):</span></span>
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399
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408
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<pre style="margin: 0;"> <span id="LC408" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># Stop if reached the max search depth.</span></span>
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400
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<pre style="margin: 0;">-<span id="LC400" class="line" lang="python"> <span class="k" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">depth</span> <span class="o" style="font-weight: 600;">>=</span> <span class="n" style="color: #333;">BaselineSearchDepth</span><span class="p">:</span></span>
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409
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<pre style="margin: 0;">+<span id="LC409" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># We use len(commit_hashes) instead of BaselineSearchDepth incase</span></span>
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410
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<pre style="margin: 0;">+<span id="LC410" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># baseline_commit_log() returned fewer than BaselineSearchDepth hashes.</span></span>
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411
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<pre style="margin: 0;">+<span id="LC411" class="line" lang="python"> <span class="k" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">depth</span> <span class="o" style="font-weight: 600;">>=</span> <span class="nb" style="color: #0086b3;">len</span><span class="p">(</span><span class="n" style="color: #333;">commit_hashes</span><span class="p">):</span></span>
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401
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412
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<pre style="margin: 0;"> <span id="LC412" class="line" lang="python"> <span class="k" style="font-weight: 600;">return</span> <span class="bp" style="color: #999;">None</span></span>
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402
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413
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<pre style="margin: 0;"> <span id="LC413" class="line" lang="python"></span>
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403
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414
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<pre style="margin: 0;"> <span id="LC414" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># Check for a metric on this commit.</span></span>
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