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| author | Lukas Larsson <lukas@erlang.org> | 2021-06-28 11:42:41 +0200 |
|---|---|---|
| committer | Lukas Larsson <lukas@erlang.org> | 2021-08-27 14:06:53 +0200 |
| commit | 1ef78b6594ba11e0a7f91e37b0637fde88210cd5 (patch) | |
| tree | f7c16dcd8a4951aa06abb5c241cb5b6adc8f822a | |
| parent | 027e601450a8020697b58d4c2794391a8c727728 (diff) | |
| download | erlang-1ef78b6594ba11e0a7f91e37b0637fde88210cd5.tar.gz | |
erts: Fix erl -emu_flavor docs and expand BeamJit perf
| -rw-r--r-- | erts/doc/src/erl_cmd.xml | 9 | ||||
| -rw-r--r-- | erts/emulator/internal_doc/BeamAsm.md | 5 |
2 files changed, 11 insertions, 3 deletions
diff --git a/erts/doc/src/erl_cmd.xml b/erts/doc/src/erl_cmd.xml index 5220663f92..7ef3ca88f9 100644 --- a/erts/doc/src/erl_cmd.xml +++ b/erts/doc/src/erl_cmd.xml @@ -304,10 +304,13 @@ $ <input>erl \ <item> <p>Useful for debugging. Prints the arguments sent to the emulator.</p> </item> - <tag><c><![CDATA[-emu_flavor Flavor]]></c></tag> + <tag><c><![CDATA[-emu_flavor emu|jit|smp]]></c></tag> <item> - <p>Start an emulator of a different flavor. The current available flavors - are: <c>emu</c> and <c>jit</c>. You can combine this flag with + <p>Start an emulator of a different flavor. Normally only one flavor is + available, more can be added by building specific flavors. The currently + available flavors are: <c>emu</c> and <c>jit</c>. + The <c>smp</c> flavor is an alias for the current default flavor. + You can combine this flag with <c>--emu_type</c>. You can get the current flavor at run-time using <seeerl marker="erlang#system_info_emu_flavor"> <c>erlang:system_info(emu_flavor)</c></seeerl>. diff --git a/erts/emulator/internal_doc/BeamAsm.md b/erts/emulator/internal_doc/BeamAsm.md index 4988126e62..3b4ac619ce 100644 --- a/erts/emulator/internal_doc/BeamAsm.md +++ b/erts/emulator/internal_doc/BeamAsm.md @@ -407,6 +407,11 @@ we have found useful: Create an archive with all the artifacts needed to inspect the data on another host. In early version of perf this command does not work, instead you can use [this bash script](https://github.com/torvalds/linux/blob/master/tools/perf/perf-archive.sh). +* `perf report` gives "failed to process sample" and/or "failed to process type: 68" + This probably means that you are running a bugge version of perf. We have + seen this when running Ubuntu 18.04 with kernel version 4. If you update + to Ubuntu 20.04 or use Ubuntu 18.04 with kernel version 5 the problem + should go away. ## FAQ |