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The property heap_size_limit from getHeapStatistics is incorrect for memory over 4032MB #10185

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rdominy opened this issue Dec 8, 2016 · 1 comment
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The property heap_size_limit from getHeapStatistics is incorrect for memory over 4032MB #10185

rdominy opened this issue Dec 8, 2016 · 1 comment
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process Issues and PRs related to the process subsystem. v8 engine Issues and PRs related to the V8 dependency.

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@rdominy
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rdominy commented Dec 8, 2016

  • Version: 7.2.1
  • Platform: Linux 3.10.0-327.10.1.el7.x86_64 deps: update openssl to 1.0.1j #1 SMP Tue Feb 16 17:03:50 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
  • Subsystem: v8

When calling the v8 module's getHeapStatistics function the heap_size_limit property is incorrect for memory sizes set over 4GB. Specifically if you set max_old_space >= 4032, heap_size_limit is incorrect. To reproduce:

node --max_old_space_size=3072

require('v8').getHeapStatistics().heap_size_limit
3288334336

This is as you would expect, but look at what 4096 does:

node --max_old_space_size=4096

require('v8').getHeapStatistics().heap_size_limit
67108864

64 MB???? That's not right. After some trial and error, the magic breaking point is 4032:

node --max_old_space_size=4032

require('v8').getHeapStatistics().heap_size_limit
0

Heap size of ZERO, when set to 4092.

This also happens on Mac OS X 10.11.6 and Node v5.11.0
@mscdex mscdex added process Issues and PRs related to the process subsystem. v8 engine Issues and PRs related to the V8 dependency. labels Dec 8, 2016
@bnoordhuis bnoordhuis mentioned this issue Dec 8, 2016
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@bnoordhuis
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#10186

bnoordhuis added a commit to bnoordhuis/io.js that referenced this issue Dec 11, 2016
@bnoordhuis
lib,src: support values > 4GB in heap statistics
aa77b76 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: nodejs#10185
PR-URL: nodejs#10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
italoacasas pushed a commit to italoacasas/node that referenced this issue Jan 18, 2017
@bnoordhuis @italoacasas
lib,src: support values > 4GB in heap statistics
0d6d6e0 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: nodejs#10185
PR-URL: nodejs#10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
italoacasas pushed a commit to italoacasas/node that referenced this issue Jan 19, 2017
@bnoordhuis @italoacasas
lib,src: support values > 4GB in heap statistics
f127e0c 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: nodejs#10185
PR-URL: nodejs#10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
italoacasas pushed a commit to italoacasas/node that referenced this issue Jan 24, 2017
@bnoordhuis @italoacasas
lib,src: support values > 4GB in heap statistics
fe3d00e 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: nodejs#10185
PR-URL: nodejs#10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
italoacasas pushed a commit to italoacasas/node that referenced this issue Jan 27, 2017
@bnoordhuis @italoacasas
lib,src: support values > 4GB in heap statistics
6e8d627 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: nodejs#10185
PR-URL: nodejs#10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
@algv algv mentioned this issue Feb 15, 2017
Closed
MylesBorins pushed a commit that referenced this issue Mar 7, 2017
@bnoordhuis @MylesBorins
lib,src: support values > 4GB in heap statistics
3981717 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: #10185
PR-URL: #10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
MylesBorins pushed a commit that referenced this issue Mar 7, 2017
@bnoordhuis @MylesBorins
lib,src: support values > 4GB in heap statistics
7d71316 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: #10185
PR-URL: #10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
MylesBorins pushed a commit that referenced this issue Mar 9, 2017
@bnoordhuis @MylesBorins
lib,src: support values > 4GB in heap statistics
a3ad63b 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: #10185
PR-URL: #10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
MylesBorins pushed a commit that referenced this issue Mar 9, 2017
@bnoordhuis @MylesBorins
lib,src: support values > 4GB in heap statistics
fc2cd63 
We were transporting the heap statistics as uint32 values to JS land but
those wrap around for values > 4 GB.  Use 64 bits floats instead, those
should last us a while.

Fixes: #10185
PR-URL: #10186
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
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@mscdex @bnoordhuis @rdominy