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Matthew Pickering pushed to branch wip/testsuite-stack-size at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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Commits:
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<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/afd1cfeb6985f299b55124292c027d6f79c2e559">afd1cfeb</a></strong>
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<span> by Matthew Pickering </span> <i> at 2023-05-23T16:11:57+01:00 </i>
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<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>testsuite: Pass -ki128k -kc128k for performance tests
Setting a larger stack (chunk size/ initial) gives a greater protection
from stack underflow (which allocates more stack chunks). This
stabilises some tests against differences cause by more things being
pushed onto the stack.
The performance tests are generally testing work done by the compiler,
using allocation as a proxy, so removing/stabilising the allocations due
to the stack gives us more stable tests which are also more sensitive
to actual changes in compiler performance.
Fixes #23439
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testsuite/driver/testlib.py
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Changes:
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/afd1cfeb6985f299b55124292c027d6f79c2e559#c591f85f122007bac88228c5ff6fd76b40e6a811"><strong style="font-weight: bold;">testsuite/driver/testlib.py</strong></a>
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<td class="line_content match" style="color: rgba(31,30,36,0.24); padding: inherit;" bgcolor="#fbfafd">@@ -1791,7 +1791,11 @@ async def simple_build(name: Union[TestName, str],</td>
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC1791" class="line" lang="python"></span>
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC1792" class="line" lang="python"> <span class="n" style="color: #333;">stats_file</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">+</span> <span class="s" style="color: #d14;">'.comp.stats'</span></span>
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC1793" class="line" lang="python"> <span class="k" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">isCompilerStatsTest</span><span class="p">():</span></span>
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<td class="new_line diff-line-num old" data-linenumber="1794" style="width: 35px; color: rgba(31,30,36,0.24); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding: inherit;" bgcolor="#fbe9eb"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'>-<span id="LC1794" class="line" lang="python"> <span class="n" style="color: #333;">extra_hc_opts</span> <span class="o" style="font-weight: 600;">+=</span> <span class="s" style="color: #d14;">' +RTS -V0 -t'</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">stats_file</span> <span class="o" style="font-weight: 600;">+</span> <span class="s" style="color: #d14;">' --machine-readable -RTS'</span></span>
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<td class="new_line diff-line-num new" data-linenumber="1794" style="width: 35px; color: rgba(31,30,36,0.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
1794
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'>+<span id="LC1794" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># Set a bigger chunk size to reduce variation due to additional under/overflowing</span></span>
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<td class="new_line diff-line-num new" data-linenumber="1795" style="width: 35px; color: rgba(31,30,36,0.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
1795
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'>+<span id="LC1795" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># The tests are attempting to test how much work the compiler is doing by proxy of</span></span>
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<td class="new_line diff-line-num new" data-linenumber="1796" style="width: 35px; color: rgba(31,30,36,0.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
1796
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'>+<span id="LC1796" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># bytes allocated. The additional allocations caused by stack overflow can cause</span></span>
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<td class="new_line diff-line-num new" data-linenumber="1797" style="width: 35px; color: rgba(31,30,36,0.24); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
1797
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'>+<span id="LC1797" class="line" lang="python"> <span class="c1" style="color: #998; font-style: italic;"># spurious failures if you trip over the limit (see #23439)</span></span>
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1798
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'>+<span id="LC1798" class="line" lang="python"> <span class="n" style="color: #333;">extra_hc_opts</span> <span class="o" style="font-weight: 600;">+=</span> <span class="s" style="color: #d14;">' +RTS -ki128k -kc128k -V0 -t'</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">stats_file</span> <span class="o" style="font-weight: 600;">+</span> <span class="s" style="color: #d14;">' --machine-readable -RTS'</span></span>
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC1799" class="line" lang="python"> <span class="k" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">backpack</span><span class="p">:</span></span>
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1796
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<td class="new_line diff-line-num" data-linenumber="1800" style="width: 35px; color: rgba(31,30,36,0.24); border-right-width: 1px; border-right-color: #ececef; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fbfafd">
1800
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dcdcde;'> <span id="LC1800" class="line" lang="python"> <span class="n" style="color: #333;">extra_hc_opts</span> <span class="o" style="font-weight: 600;">+=</span> <span class="s" style="color: #d14;">' -outputdir '</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">+</span> <span class="s" style="color: #d14;">'.out'</span></span>
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