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This has been seen to be a bottleneck at high load: each undef results
in a loop out to the code server.
Originally implemented as suggested in the erts user's guide, in commits
e6d19a18 and d4386254.
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The function already operates on arbitrary terms.
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lcnt:inspect/1 recently showed this:
lock id #tries collisions [%] time [us]
----- --- ------- --------------- ----------
db_tab diameter_stats 932920 92.9326 330332554
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In particular, restart the timer with each incoming Diameter message,
only when the previous timer has expired. Doing so has been seen to
result in high lock contention at load, as in the example below:
(diameter@test)9> lcnt:conflicts([{print, [name, tries, ratio, time]}]).
lock #tries collisions [%] time [us]
----- ------- --------------- ----------
bif_timers 7844528 99.4729 1394434884
db_tab 17240988 1.7947 6286664
timeofday 7358692 5.6729 1399624
proc_link 4814938 2.2736 482985
drv_ev_state 2324012 0.5951 98920
run_queue 21768213 0.2091 63516
pollset 1190174 1.7170 42499
pix_lock 1956 2.5562 39770
make_ref 4697067 0.3669 20211
proc_msgq 9475944 0.0295 5200
timer_wheel 5325966 0.0568 2654
proc_main 10005332 2.8190 1079
pollset_rm_list 59768 1.7752 480
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The function has been auto-exported since R14B.
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The suite pretends to be gen_tcp-ish in configuring itself to
diameter_tcp. The function close/1 can be called as a result.
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* anders/diameter/test/OTP-12767:
Replace config suite call to erlang:now/0
Fix incorrect suite usage of OTP 18 monotonic time
Make tls suite crash more verbosely
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* anders/diameter/17.5.5/OTP-12757:
vsn -> 1.9.2
Update appup for 17.5.5
Fix mangled release note
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* anders/diameter/sctp/OTP-12744:
Fix diameter_sctp listener race
Tweak transport suite failures
Run traffic suite over SCTP
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* anders/diameter/counters/OTP-12741:
Fix counting of no_result_code/invalid_error_bit
Count relayed answers
Rename dictionary-related functions/variables
Lift answer send up the call chain
Count discarded incoming messages
Include R-bit in unknown message counter keys
Fix broken relay counters
Fix broken result code counters
Add counters testcase to relay suite
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Commit 4b691d8d made it possible for accepting transport processes to be
started concurrently, and commit 77c1b162 adapted diameter_sctp to this,
but missed that the publication of the listener process in diameter_reg
has to precede the return of its start function. As a result, concurrent
starts could result in multiple listener processes.
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Make anything but a comm_up sctp_assoc_change crash. Make timeouts more
reasonable.
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Previously it was only run over TCP.
Configure a pool of accepting processes since simultaneous connections
are otherwise prone to rejection, as discussed in commit 4b691d8d.
Tweak timeouts to more reasonable values.
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To remove a compilation warning with OTP 18.
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Value was used as strictly increasing when it's only non-decreasing,
causing testcases to fail.
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To see why it's failing on at least one test machine.
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- OTP-12741: disfunctional counters
- OTP-12744: diameter_sctp race
No load order requirements.
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The message was regarded as unknown if the answer message in question
set the E-bit and the application dictionary was not the common
dictionary.
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That is, outgoing answer messages received in response to a
handle_request callback having returned {relay, Opts}.
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To clarify what it is that's being computed, which isn't entirely
obvious. No functional change, just renaming.
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As the first step in starting to count outgoing, relayed answer
messages.
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An incoming Diameter message is either a request, an answer to an
outstanding request, or an unexpected answer. The latter weren't
counted, but are now counted on keys of this form:
{pid(), {{unknown, 0}, recv, discarded}}
The form of the second element is similar to those of other counters,
like:
{{relay, 0|1}, send|recv, invalid_error_bit}
Compare this to the key used when counting known answers:
{{ApplicationId, CommandCode, 0}, recv}
The application id and command code aren't included so as not to count
on arbitrary keys, a topic last visited in commit 49e8b11c.
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To differentiate between requests and answers, in analogy with relay
counters. This isn't backwards compatible, but these counters aren't yet
documented.
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Commit 49e8b11c broke the counting of relayed message, causing them to
be accumulated as unknown messages.
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Commit a1df50b3 broke result code counters in the case of answer
messages sent as a header/avp lists (unless the avps, untypically, set
the name field), and for answers sent/received in the relay application.
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* hans/ssh/ssh_msg_debug_fun/OTP-12738:
ssh: option for handling the SSH_MSG_DEBUG message's printouts
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Which fails for a variety of reasons to be addressed in subsequent
commits.
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A fun could be given in the options that will be called whenever
the SSH_MSG_DEBUG message arrives. This enables the user to
format the printout or just discard it.
The default is changed to not print the message. In RFC4253
printing is a SHOULD, but our new default is to protect logs
from dos attacs.
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* anders/diameter/17.5.3/OTP-12702:
Fix broken pre-17.4 appup
Update appup for 17.5.3
vsn -> 1.9.1
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* anders/diameter/counters/OTP-12701:
Add counters testcase to 3xxx suite
Fix counting error with unknown application id
Add missing doc wording
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* anders/diameter/result_codes/OTP-12654:
Fix broken traffic testcase
Match harder in traffic suite
Don't confuse Result-Code and Experimental-Result
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* anders/diameter/extra_avp_bit/OTP-12642:
Remove extra avp bit from diameter_avp decode
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* dgud/common_test/netconf-user-caps/OTP-12707:
common_test: Add user capability option to hello
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* peppe/common_test/ct_telnet_wait_for_prompt.maint:
Introduce wait_for_prompt option
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* peppe/common_test/timetrap_line.maint:
Fix problem with line number not always showing in log
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* peppe/common_test/modify_vts.maint:
Get the VTS mode working with private CT version of webtool
Change order of ct_run help sections
Prepare for webtool integration with CT
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* peppe/common_test/longname_problem.maint:
Fix error in ct_logs, not handling long names correctly
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* peppe/test_tools_vsn.maint:
Bump version numbers
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* dgud/common_test/netconf/OTP-12698:
common_test: Recurse when there is more data in netconf
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* raimo/snmp/net_if-port-0-with-fd-option/OTP-12669:
Improve agent fix as in manager
Use port 0 with {fd,Fd}, use snmpm_fd in manager
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The send_error testcase tested that Session-Id in an answer-message was
not undefined, but that's always the case since the AVP has arity 0 or
1. The correct test is that it's a list of length 1, to ensure that
diameter has inserted the session id as expected.
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To ensure that the expected answer messages are received.
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Decode of an answer message not setting the E-bit, and containing
Experiment-Result but not Result-Code, identified Result-Code as the
erroneous when Erroneous-Result-Code was 3xxx. Here's an example (from
trace) of a the errors field after decode:
[{5004,
{diameter_avp,undefined,undefined,false,false,undefined,'Result-Code',
3001,undefined,undefined}}],
The diameter_avp was just constructed from the AVP name and decoded
result, without regard for which result code AVP contained the value.
Fix by extracting the AVP from the incoming message.
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