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Change scheduler responsiveness to 'check_schedulers'.
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In addition, the heart API is extended with the following functions:
* heart:set_options/1
* heart:get_options/0
If heart:set_options([scheduler]) is set, heart will check
scheduler responsiveness before every heartbeat to the heart port.
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Before a heartbeat to the port program a responsiveness check of
the schedulers is performed. If the responsiveness check fails,
stalls, the heartbeat will not be performed (as intended).
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* heart:set_callback/2
* heart:get_callback/0
* heart:clear_callback/0
The callback is called before every heartbeat to the heart port.
The callback needs to return 'ok' if the validation is correct.
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* siri/kernel/heart-set_cmd-unicode/OTP-10843:
Convert command string to encoded binary in heart:set_cmd/1
Conflicts:
lib/kernel/src/heart.erl
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OTP-10843
In order to allow unicode filenames in heart commands, the command
string is now encoded according to the file name translation mode of
the emulator (file:native_name_encoding()) before it is sent to the
heart process.
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When heart cycles we need to unregister the old port before
starting the new heart port program.
OTP-10591
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When a crash dump is about to be written and we have
heartbeat enabled on a system. We need time to write it
before heart explicitly kills the beam.
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This is a workaround for init:restart.
The root problem is that delete/purge_module does not
clean up internal hipe bookkeeping (hipe_mfa_info's)
properly.
Symptom: Execution of deallocated beam code.
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* ks/kernel:
kernel: Clean up as suggested by tidier
OTP-8606 ks/kernel
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