The existing backend server implementations were inefficient since they
were sleeping for the full length of the timeouts rather than being woken when
there was data ready for them. It was assumed they would wake and perhaps did
when we forked processes directory but that is no longer the case.
This updates both the process and xmlrpc backends to wait using select(). This
does mean we need to pass the file descriptors to wait on from the internals
who know which these file descriptors are but this is a logical improvement.
Tests of a pathaolgical load on the process server of ~420 rapid tasks
executed on a server with BB_NUMBER_THREAD=48 went from a wall clock
measurement of the overall command execution time of 75s to a much more
reasonable 24s.
(Bitbake rev: 9bee497960889d9baa0a4284d79a384b18a8e826)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Add functionality to allow UIs to update and change the types of events they
recieve. To do this we need to add a new command and also need to be able
to obtain the current event hander ID. In the case of xmlrpc, this is
straightforward, in the case of the process server we need to save the result
in a multiprocessing.Value() so we can retrive it. An excplit command
was added to the server API to facilitate this.
The same function can also be used to mask or unmask specific log messages,
allowing the UI to optionally differ from the standard set of message
filtering.
Based upon work by Cristiana Voicu <cristiana.voicu@intel.com>
(Bitbake rev: ba5a6c88785d9889d4172ec79937ac2a5555327e)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
It turns out we have a number of different ways the process server termination can
hang. If we call cancel_join_thread() on the event queue, it means that it can be left
containing partial data. This means the reading of the event queue in the terminate()
function can hang, the timeout and block parameters to Queue.get() don't make any
difference.
Equally, if we don't call cancel_join_thread(), the join_thread in terminate()
will hang giving a different deadlock.
The best solution I could find is to loop over the process is_alive() after requesting
it stops, trying to join the thread and if that fails, try and flush the event
queue again.
It wasn't clear what difference a force option should make in this case, we're
gracefully trying to empty queues and shut down regardless of whether its a SIGTERM
so I've simply removed the force option.
(Bitbake rev: c5c8f33ca4b81877a0115887849881001b745bf0)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Now we've moved to require python 2.7.3, we can jettison the compatibility
workarounds/hacks for older python versions.
(Bitbake rev: a51c402304f2080a76720f9b31d6dfdbed393bba)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
In an attempt to minimize code duplication, create
clear interfaces, and maximize code reuse through OOP,
bb.server adds base classes for the BitBakeServer,
BitBakeServerConnection and actual server implementations
instructed in particular server types.
These classes document the minimum interfaces that the
derived classes must implement, and provide boilerplate code.
Changes to None, Process and XMLRPC servers as to use
the common server infrastructure.
(Bitbake rev: 6db4a64cef20f8d0aba804db4c4e1eec7b112b46)
Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
With the removal of the none server type, we can remove the launchUI
method and simplify the code slightly.
(Bitbake rev: 9bef2f2dd0bcaa59528ebcb3c1ce053b7dff1ec6)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Using the threading module interacts badly with multiprocessing used elsewhere
in bitbake under certain machine loads. This was leading to bitbake hanging on
Ctrl+C when the PR Server was being used.
This patch converts it to always use the daemonize code which
then means the threading code isn't required.
[YOCTO #3742]
(Bitbake rev: 2d0bbd9398ab839bd2d1e29e50b25d52efb1ce2a)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
In normal usage, we never hit the timeout issue. If we do, it becomes obvious
that the current error handling is not good enough. The request may have made it
to the server and the answer will get queued. This means the next command may get
the return value from the previous command with suitably puzzling results.
Without rewriting large sections of code, its not possible to avoid this problem.
It is better to increase the timeout to several seconds giving the server a chance
to respond and if it does timeout, hard exit since recovery is not possible with the
code base today.
I'd be happy to see the structure of this code improved but this quick fix at least
stops corrupted builds from happening which has to be a good thing.
(Bitbake rev: 410c11dd10736873f2dc587fbe9119c38831e693)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Currently, command.py can return an error message from runCommand, due to
being unable to run the command, yet few of our UIs (just hob) can handle it
today. This can result in seeing a TypeError with traceback in certain rare
circumstances.
To resolve this, we need a clean way to get errors back from runCommand,
without having to isinstance() the return value. This implements such a thing
by making runCommand also return an error (or None if no error occurred).
As runCommand now has a method of returning errors, we can also alter the
getCmdLineAction bits such that the returned value is just the action, not an
additional message. If a sync command wants to return an error, it raises
CommandError(message), and the message will be passed to the caller
appropriately.
Example Usage:
result, error = server.runCommand(...)
if error:
log.error('Unable to run command: %s' % error)
return 1
(Bitbake rev: 717831b8315cb3904d9b590e633000bc897e8fb6)
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This code is dead and doesn't do anything so lets remove it.
(Bitbake rev: 8d45739f49618757a5d7d79782deda355e3981ec)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Update exception handling syntax to use the modern style:
except ExcType as localvar
(Bitbake rev: dbf5f42b06bef81749b13aa99945cc1292a6676d)
Signed-off-by: Scott Garman <scott.a.garman@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Richard Purdie
Alexandru DAMIAN
Christopher Larson
Scott Garman