deps: backport 03ef3cd from V8 upstream#3165
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Reduces likelihood of the filename being truncated in /tmp/perf-*.map when profiling with --perf_basic_prof. v8/v8@03ef3cd Original commit message: improve perf_basic_prof filename reporting The buffer used for appending filenames to the string printed to the perf_basic_prof log was unnecessarily too small. Bump it up to be at least kUtf8BufferSize. Truncation of filenames makes it really hard to work with profiles gathered on Node.js. Because of the way Node.js works, you can have node module dependencies in deeply nested directories. The last thing you want when investigating a performance problem is to have script names be truncated. This patch is a stop-gap. Ideally, I want no truncation of the filename at all and use a dynamically growing buffer. That would be a larger change, and I wanted to have a quick fix available that can be back-ported to Node.js LTS release. R=yangguo@chromium.org,yurys@chromium.org BUG= Review URL: https://codereview.chromium.org/1388543002 Cr-Commit-Position: refs/heads/master@{nodejs#31092}
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LGTM |
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Reduces likelihood of the filename being truncated in /tmp/perf-*.map when profiling with --perf_basic_prof. PR-URL: #3165 Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl> v8/v8@03ef3cd Original commit message: improve perf_basic_prof filename reporting The buffer used for appending filenames to the string printed to the perf_basic_prof log was unnecessarily too small. Bump it up to be at least kUtf8BufferSize. Truncation of filenames makes it really hard to work with profiles gathered on Node.js. Because of the way Node.js works, you can have node module dependencies in deeply nested directories. The last thing you want when investigating a performance problem is to have script names be truncated. This patch is a stop-gap. Ideally, I want no truncation of the filename at all and use a dynamically growing buffer. That would be a larger change, and I wanted to have a quick fix available that can be back-ported to Node.js LTS release. R=yangguo@chromium.org,yurys@chromium.org BUG= Review URL: https://codereview.chromium.org/1388543002 Cr-Commit-Position: refs/heads/master@{#31092}
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Landed on master in 6fff47f. |
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I forgot to run a CI, apologies. Here's the CI: https://ci.nodejs.org/job/node-test-pull-request/417/. As expected, the CI looks okay as we don't really run anything with |
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Can this be closed? |
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Re-opening to revert this due to https://codereview.chromium.org/1390923004/ |
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This is a reland of nodejs#3165. The patch abates the truncation of script filenames in the perf-event output produced by V8. V8 commits: Original: v8/v8@03ef3cd Reland: v8/v8@010897c Original commit message: improve perf_basic_prof filename reporting The buffer used for appending filenames to the string printed to the perf_basic_prof log was unnecessarily too small. Bump it up to be at least kUtf8BufferSize. Truncation of filenames makes it really hard to work with profiles gathered on Node.js. Because of the way Node.js works, you can have node module dependencies in deeply nested directories. The last thing you want when investigating a performance problem is to have script names be truncated. This patch is a stop-gap. Ideally, I want no truncation of the filename at all and use a dynamically growing buffer. That would be a larger change, and I wanted to have a quick fix available that can be back-ported to Node.js LTS release. R=yangguo@chromium.org,yurys@chromium.org BUG= Review URL: https://codereview.chromium.org/1388543002
This was referenced Oct 27, 2015
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This is a reland of #3165. The patch abates the truncation of script filenames in the perf-event output produced by V8. V8 commits: Original: v8/v8@03ef3cd Reland: v8/v8@010897c Original commit message: improve perf_basic_prof filename reporting The buffer used for appending filenames to the string printed to the perf_basic_prof log was unnecessarily too small. Bump it up to be at least kUtf8BufferSize. Truncation of filenames makes it really hard to work with profiles gathered on Node.js. Because of the way Node.js works, you can have node module dependencies in deeply nested directories. The last thing you want when investigating a performance problem is to have script names be truncated. This patch is a stop-gap. Ideally, I want no truncation of the filename at all and use a dynamically growing buffer. That would be a larger change, and I wanted to have a quick fix available that can be back-ported to Node.js LTS release. R=yangguo@chromium.org,yurys@chromium.org BUG= Review URL: https://codereview.chromium.org/1388543002 PR-URL: #3520 Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
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This is a reland of #3165. The patch abates the truncation of script filenames in the perf-event output produced by V8. V8 commits: Original: v8/v8@03ef3cd Reland: v8/v8@010897c Original commit message: improve perf_basic_prof filename reporting The buffer used for appending filenames to the string printed to the perf_basic_prof log was unnecessarily too small. Bump it up to be at least kUtf8BufferSize. Truncation of filenames makes it really hard to work with profiles gathered on Node.js. Because of the way Node.js works, you can have node module dependencies in deeply nested directories. The last thing you want when investigating a performance problem is to have script names be truncated. This patch is a stop-gap. Ideally, I want no truncation of the filename at all and use a dynamically growing buffer. That would be a larger change, and I wanted to have a quick fix available that can be back-ported to Node.js LTS release. R=yangguo@chromium.org,yurys@chromium.org BUG= Review URL: https://codereview.chromium.org/1388543002 PR-URL: #3520 Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
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This is a reland of nodejs#3165. The patch abates the truncation of script filenames in the perf-event output produced by V8. V8 commits: Original: v8/v8@03ef3cd Reland: v8/v8@010897c Original commit message: improve perf_basic_prof filename reporting The buffer used for appending filenames to the string printed to the perf_basic_prof log was unnecessarily too small. Bump it up to be at least kUtf8BufferSize. Truncation of filenames makes it really hard to work with profiles gathered on Node.js. Because of the way Node.js works, you can have node module dependencies in deeply nested directories. The last thing you want when investigating a performance problem is to have script names be truncated. This patch is a stop-gap. Ideally, I want no truncation of the filename at all and use a dynamically growing buffer. That would be a larger change, and I wanted to have a quick fix available that can be back-ported to Node.js LTS release. R=yangguo@chromium.org,yurys@chromium.org BUG= Review URL: https://codereview.chromium.org/1388543002 PR-URL: nodejs#3520 Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
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Oct 29, 2015
This is a reland of #3165. The patch abates the truncation of script filenames in the perf-event output produced by V8. V8 commits: Original: v8/v8@03ef3cd Reland: v8/v8@010897c Original commit message: improve perf_basic_prof filename reporting The buffer used for appending filenames to the string printed to the perf_basic_prof log was unnecessarily too small. Bump it up to be at least kUtf8BufferSize. Truncation of filenames makes it really hard to work with profiles gathered on Node.js. Because of the way Node.js works, you can have node module dependencies in deeply nested directories. The last thing you want when investigating a performance problem is to have script names be truncated. This patch is a stop-gap. Ideally, I want no truncation of the filename at all and use a dynamically growing buffer. That would be a larger change, and I wanted to have a quick fix available that can be back-ported to Node.js LTS release. R=yangguo@chromium.org,yurys@chromium.org BUG= Review URL: https://codereview.chromium.org/1388543002 PR-URL: #3520 Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
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@ofrobots @bnoordhuis ... does this need to go into v4 |
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Nevermind... just saw #3237 |
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Reduces likelihood of the filename being truncated in /tmp/perf-*.map when
profiling with --perf_basic_prof.
R=@bnoordhuis
v8/v8@03ef3cd
Original commit message:
improve perf_basic_prof filename reporting
The buffer used for appending filenames to the string printed to the
perf_basic_prof log was unnecessarily too small. Bump it up to be at least
kUtf8BufferSize.
Truncation of filenames makes it really hard to work with profiles gathered on
Node.js. Because of the way Node.js works, you can have node module dependencies
in deeply nested directories. The last thing you want when investigating a
performance problem is to have script names be truncated.
This patch is a stop-gap. Ideally, I want no truncation of the filename at all
and use a dynamically growing buffer. That would be a larger change, and I
wanted to have a quick fix available that can be back-ported to Node.js LTS
release.
R=yangguo@chromium.org,yurys@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1388543002
Cr-Commit-Position: refs/heads/master@{#31092}