Under certain timing conditions, the test would end up flushing the
input from the input filter in a nested way, which ultimately resulted
in lost input events of the outer nesting level. This patch eliminates
this corner case and thereby stabilizes the key-repeat test.
Transfer quota to the session local RAM session to react to the
Quota_exceeded exception properly.
The platform driver keeps a session local RAM session for each of its
clients that is used to allocate DMA memory. A client needs to transfer
some of its quota to the platform driver, which in return transfers this
quota to the session local RAM session. As it happens allocating memory
from a RAM session involves book keeping and in this case, where the
available quota in the session did not suffice and the request was only
a few KiB, the platform driver handled the exception wrongly and did not
transfer the quota.
This problem did not surface up to now because all drivers allocate DMA
memory in larger chunks and the book keeping overhead was of no
consequence as the initial quota transfer probably covered the overhead.
Fixes#2316.
* Increase test-thread count to trigger quota exceeding on all platforms
* Synchronize test-thread destruction, otherwise an half-destructed thread
object can lead to an error message of the thread to be destructed,
which causes a deadlock, when the destructed thread still holds the log lock
* Limit SMP settings for QEMU to x86 (Ref #2307)
The signal_1/2/3 objects (which are threads) are in destruction, but still
signals are send to them. When the signal arrive and the memory for the
signal_1/2/3 object is already invalid we operate on stale memory and all
the locking infrastructure of the Thread don't work anymore.
Be more robust, explicitly wait for the termination of the thread.
Issue #2284
This patch improves the accuracy of init's quota-saturation feature
(handing out all slack quota to a child by specifying an overly high RAM
quota for the child) and makes the RAM preserved by init configurable.
The preservation is specified as follows:
! <config>
! ...
! <resource name="RAM" preserve="1M"/>
! ...
! </config>
If not specified, init has a reasonable default of 160K (on 32 bit) and
320K (on 64 bit).
This patch lets init apply configuration changes to a running scenario
in a differential way. Children are restarted if any of their session
routes change, new children can be added to a running scenario, or
children can deliberately be removed.
Furthermore, the new version of init is able to propagate configuration
changes (modifications of <config> nodes) to its children without
restarting them.
Change metadata before submitting a packet. If the submitting thread is a
pthread, the metadata may be immediately change by the signal handler running
in the context of the entrypoint thread.
This patch improves the accounting for the backing store of
session-state meta data. Originally, the session state used to be
allocated by a child-local heap partition fed from the child's RAM
session. However, whereas this approach was somehow practical from a
runtime's (parent's) point of view, the child component could not count
on the quota in its own RAM session. I.e., if the Child::heap grew at
the parent side, the child's RAM session would magically diminish. This
caused two problems. First, it violates assumptions of components like
init that carefully manage their RAM resources (and giving most of them
away their children). Second, if a child transfers most of its RAM
session quota to another RAM session (like init does), the child's RAM
session may actually not allow the parent's heap to grow, which is a
very difficult error condition to deal with.
In the new version, there is no Child::heap anymore. Instead, session
states are allocated from the runtime's RAM session. In order to let
children pay for these costs, the parent withdraws the local session
costs from the session quota donated from the child when the child
initiates a new session. Hence, in principle, all components on the
route of the session request take a small bite from the session quota to
pay for their local book keeping
Consequently, the session quota that ends up at the server may become
depleted more or less, depending on the route. In the case where the
remaining quota is insufficient for the server, the server responds with
'QUOTA_EXCEEDED'. Since this behavior must generally be expected, this
patch equips the client-side 'Env::session' implementation with the
ability to re-issue session requests with successively growing quota
donations.
For several of core's services (ROM, IO_MEM, IRQ), the default session
quota has now increased by 2 KiB, which should suffice for session
requests to up to 3 hops as is the common case for most run scripts. For
longer routes, the retry mechanism as described above comes into effect.
For the time being, we give a warning whenever the server-side quota
check triggers the retry mechanism. The warning may eventually be
removed at a later stage.
This patch equips init with the ability to report its internal state in
the form of a "state" report. This feature can be enabled by placing a
'<report>' node in init's configuration.
The report node accepts the following arguments (with their default
values):
'delay_ms="100"': specifies the number of milliseconds to wait before
producing a new report. This way, many consecutive state changes -
like they occur during the startup - do not result in an overly
large number of reports but are merged into one final report.
'buffer="4K"': the maximum size of the report in bytes. The attribute
accepts the use of K/M/G as units.
'init_ram="no"': if enabled, the report will contain a '<ram>' node
with the memory stats of init.
'ids="no"': supplement the children in the report with unique IDs, which
may be used to infer the lifetime of children accross configuration
updates in the future;
'requested="no"': if enabled, the report will contain information about
all session requests initiated by the children.
'provided="no"': if enabled, the report will contain information about
all sessions provided by all servers.
'session_args="no"': level of detail of the session information
generated via 'requested' or 'provided'.
'child_ram="no"': if enabled, the report will contain a '<ram>' node
for each child based on the information obtained from the child's RAM
session.
Issue #2246
This commit includes changes to the Nic::Session_component interface.
We now pass the entire env to the component instead of only ram, rm and
the ep because we need the env to open connections from within the
Session_component implemenation. So far only the cadence_gem driver
needs this, though.
Issue #2280.
