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<h3>
Ben Gamari pushed to branch wip/gc/docs
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/698533af5be4104ec239cd17385ab2a48913ac3e">698533af</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-17T19:40:26Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts: Add GetMyThreadCPUTime helper
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/3b34cfb14cdf9e0ac9df80257848053d48de4fbd">3b34cfb1</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-17T19:43:00Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts/Stats: Track time usage of nonmoving collector
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/d6b14a1f9785270bea4e07dddb0c619cad76504a">d6b14a1f</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:13:02Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts: Add prefetch macros
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/c9e5e5e042d2f4bc38de12540250762ba477635d">c9e5e5e0</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:19:37Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Prefetch when clearing bitmaps
Ensure that the bitmap of the segmentt that we will clear next is in
cache by the time we reach it.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/b78483f0f7371f28e9361c442ad0c583ecb373a8">b78483f0</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:22:44Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Inline nonmovingClearAllBitmaps
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/931782815beca7a1118adfb2335edb37c9153a13">93178281</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:24:25Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Fuse sweep preparation into mark prep
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/f6704ef0f8d7d0ecb22b078f563d26e78ecc8595">f6704ef0</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:27:16Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Pre-fetch during mark
This improved overall runtime on nofib's constraints test by nearly 10%.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/67c6a5c85981d6f3264d17f1532c3626a9e7e961">67c6a5c8</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:49:57Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Prefetch segment header
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/cddfb6ab29575b51cfd86501a755439e6e3b7d3c">cddfb6ab</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:50:01Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Optimise allocator cache behavior
Previously we would look at the segment header to determine the block
size despite the fact that we already had the block size at hand.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/9bc0f119c9cb64a6ac66ff9dd7d07f1015cdd963">9bc0f119</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:50:02Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMovingMark: Eliminate redundant check_in_nonmoving_heaps
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/57a995c4b33dae24707e9b8760c18feb127c5b52">57a995c4</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:50:02Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Don't do major GC if one is already running
Previously we would perform a preparatory moving collection, resulting
in many things being added to the mark queue. When we finished with this
we would realize in nonmovingCollect that there was already a collection
running, in which case we would simply not run the nonmoving collector.
However, it was very easy to end up in a "treadmilling" situation: all
subsequent GC following the first failed major GC would be scheduled as
major GCs. Consequently we would continuously feed the concurrent
collector with more mark queue entries and it would never finish.
This patch aborts the major collection far earlier, meaning that we
avoid adding nonmoving objects to the mark queue and allowing the
concurrent collector to finish.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/0dc9f62d456db8b9614662666ab3192ab684617b">0dc9f62d</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:50:02Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Nonmoving: Ensure write barrier vanishes in non-threaded RTS
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/e2921c353096cab34b8f0852260eb18833ed8153">e2921c35</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:50:29Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Merge branches 'wip/gc/optimize' and 'wip/gc/test' into wip/gc/everything
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/43a7fc720b204af82bae7fe124b2fb20a756041f">43a7fc72</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:53:40Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: Add summarizing Note
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/916a7de2156e40eb9c19016e9e5c58d766525b0e">916a7de2</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-19T18:53:40Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NonMoving: More comments
</pre>
</li>
</ul>
<h4>30 changed files:</h4>
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<li class="file-stats">
<a href="#6011cad13b19136953f8ee72df01a66623c5c1b0">
includes/Cmm.h
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<li class="file-stats">
<a href="#40f83a2cddcbc1f8190b0551eb572ccf4ea88cc9">
includes/Rts.h
</a>
</li>
<li class="file-stats">
<a href="#f7bfc5e15e7497f29b41f6df46865c151a07955d">
includes/RtsAPI.h
</a>
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<li class="file-stats">
<a href="#debe527847514360ea5e75538c7630ba2dfebba6">
includes/rts/EventLogFormat.h
</a>
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<li class="file-stats">
<a href="#241971342cd0c394b24e67a781cf7e3d2f01aa72">
includes/rts/Flags.h
</a>
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<li class="file-stats">
<a href="#3b4c67d255fe638e594c28d4a73d04aee85a04f0">
includes/rts/NonMoving.h
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<li class="file-stats">
<a href="#2f870b7c76a5e24010e464cc1a1f860c0f9e0dab">
includes/rts/storage/TSO.h
</a>
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<li class="file-stats">
<a href="#c184941110ec11e4f595256c2354bed617511571">
libraries/base/GHC/RTS/Flags.hsc
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<li class="file-stats">
<a href="#023c46971c621e339912811040e9c049ece01475">
libraries/base/GHC/Stats.hsc
</a>
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<li class="file-stats">
<a href="#b817c80cbb15890d9a6df41e91d15d7442471f3c">
libraries/base/tests/all.T
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<li class="file-stats">
<a href="#e7e177c17e4bf37dc865a39cde7a0ec9e1a33362">
libraries/ghc-heap/tests/all.T
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<li class="file-stats">
<a href="#c1274dbbb0bbd96f2491cb4f6bfcf394d895b8f4">
nofib
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<li class="file-stats">
<a href="#ab886ab520e51dbacc9947d1586d5257a6037f77">
rts/GetTime.h
</a>
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<li class="file-stats">
<a href="#63bb2dcb45bf7982130b0b95ecf366bf1a617e82">
rts/Messages.c
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<li class="file-stats">
<a href="#6db965f97cbab901f493506a385bcf1283009921">
rts/PrimOps.cmm
</a>
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<li class="file-stats">
<a href="#640fc6f2f536ba83f1694f9a7ef3d43e2d0428d3">
rts/RtsFlags.c
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<li class="file-stats">
<a href="#e137645f8a9be9fa32cc764e19cea2b492e33d9c">
rts/STM.c
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<li class="file-stats">
<a href="#7d6961cb073b9fe3df3a81f0ad5cf36eed293c42">
rts/Schedule.c
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<li class="file-stats">
<a href="#6c6e266b51f1c94d2ebf5aa2052f408397451f94">
rts/Stats.c
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<li class="file-stats">
<a href="#b90c7236dd80d0ab7be1156ccd798e69994e38c6">
rts/Stats.h
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<li class="file-stats">
<a href="#4b22b3f666af23f7c8097b32282abfd52fb6c342">
rts/ThreadPaused.c
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<li class="file-stats">
<a href="#a5d219117032120cc7bde9f13451d9627cff5614">
rts/Threads.c
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<li class="file-stats">
<a href="#050d739b5c42d009648d099fb66bae809e83482e">
rts/Trace.c
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<li class="file-stats">
<a href="#af7520a7c19cb7a894a90a944c97a4ed95f12b78">
rts/Trace.h
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<li class="file-stats">
<a href="#2ffbdc61d9d0e36978f07f62c00c08f33149e335">
rts/Updates.h
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<li class="file-stats">
<a href="#4bef7d0c5d4ce46744aaacac2800349746d7e44f">
rts/eventlog/EventLog.c
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<li class="file-stats">
<a href="#76aeecda0541f8b07341c3e7947c02a0cae5b8af">
rts/eventlog/EventLog.h
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<li class="file-stats">
<a href="#8d4f2f35ca75df36e543dd637c726b7578faf8be">
rts/posix/GetTime.c
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<li class="file-stats">
<a href="#6477e10756faf038741e63d1ad499a1df809fe10">
rts/sm/GC.c
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<li class="file-stats">
<a href="#26a3faea0f0e66eab204fe0639219eea4729a9d3">
rts/sm/GCThread.h
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</ul>
<h5>The diff was not included because it is too large.</h5>
</div>
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