Before scheduling we check if the execlist is empty. When many clients
are present, the bits might not be cleared by hardware yet. Before the
watchdog timer would trigger, because we scheduled nothing. Now we try
serval times, even if this fails, we still schedule because in the worst
case only a preemption would happen.
issue #4820
This patch promotes the event of an exiting child to become immediately
reported, reducing delays for management components that watch the exit
status of children.
Fixes#4814
Optionally log scheduling-context execution time in addition to the
thread-context. This may be relevant on kernel platforms that do not
schedule threads on their own CPU share only but implement some kind of
donation scheme, for example, NOVA.
Usage
<config sc_time="yes" ...> ... </config>
Fixes#4805
- move metadata specific to isochronous transfers from the descriptor
into the content of USB-session packets
- restore support for 32 in-flight packets in the USB C API
Fixes#4749
Previously the 'partitions' report was implicitly generated after
parsing the partition-table by accessing the referenced reporter
object.
Now the report is explicitly created by calling the 'generate_report'
member function. At this point we no longer have access to all
required information so the 'Partition' class was extended to
accommodate for the data needed by MBR as well as GPT reports.
Fixes#4786.
The 'File_content' utility throws an exception whenever a file happens
to get truncated during the reading process. But it silently truncates
the data against the specified limit. In practice, exceeding the limit
is usually an error case. This patch enhances the 'File_content' utility
by throwing 'Truncated_during_read' in the limit-exceeded case as well,
in order to ease the diagnosis of such cases.
Issue #4788
'cap()' will return invalid capability within session destructor, therefore Vram
objects that belong to the session will not be destroyed, leading to danling
references later on. Use '_owner.cap' of session instead.
VirtIO device models can assert interrupts to notify about
buffer and configuration changes. By now, we could only assert
buffer notification interrupts, but no configuration changes.
The latter is needed, e.g. to notify about GPU mode changes.
Ref genodelabs/genode#4783
Depending on the number of partitions the current fixed size of 4096
bytes might not be sufficient for the resulting partitions report.
The use of the expanding reporter allows for accomodating large reports
while still keeping the resource usage down for the common case of
few partitions (with potentially short names).
Fixes#4782.
This commit introduces support for the HMB feature and will setup the
buffer during start-up. The host-memory-buffer (HMB) feature is mostly
used on NVMe devices that do not make use of an DRAM cache to store its
translation tables amongst other operational data. Not using HMB can
impair the performance on such devices.
The memory is allocated in 2 MiB chunks of DMA-capable memory and its
total size in bytes is configurable via the 'hmb_size' config attribute.
The driver always checks the minimal and preferred size of the HMB and
issues a warning in case it is not enabled via the configuration.
Moreover, if the configured size is less than the minimal amount
required by the device the HMB is not configured at all and a warning
is issued also. If the configured size is more than the preferred size
it will be capped to that amount.
Fixes#4715.
This patch converts the loader implementation to the 'Session_object'
interface to implement the ability to upgrade the session caps and RAM
after after the session creation. This is needed to accommodate the
change of the Loader::Connection in commit "Remove format strings from
connection types".
Issue #2064
This patch ultimatedly removes format strings from Genode's base API.
Users of the former base/snprintf.h and base/console.h headers may
use the free-standing 'format' library hosted in the ports repository.
Fixes#2064Fixes#3869
Implicitely fixes problems with USB devices having more than 4G blocks.
Formerly the 16-Cmd LBA requests were silently casted to 32-bit.
Fixgenodelabs/genode#4771
Several explicit casts could not be avoided yet, due to the missing
differentiation in between virtual and physical addresses that leads
to casting problems when using 32-bit ARM, and because the MMIO
register framework does not allow to return narrowed types of bitfields.
Apart from that, this commit fixes a switch-case fallthrough error in
Mmio_register::write.
Fixgenodelabs/genode#4770
The read_config and write_config functions in the generic virtio
headers used by all drivers lead to compiler warnings resp. errors
if effective-c++ switch is enabled. Moreover, the functions require
to define the access width as parameter. We can better turn them
into template functions using the value type to read resp. write to
derive the access width.
Ref genodelabs/genode#4344
The 'file_size' type denotes the size of files on disk in bytes. On
32-bit architectures it is larger than the size_t, which refers to
in-memory object sizes.
Whereas the use of 'file_size' is appropriate for ftruncate and seek, it
is not a suitable type for the parameters of read/write operations
because those operations refer to in-memory buffers.
This patch replaces the use of 'file_size' by size_t. However, since it
affects all sites where the read/write interface is uses, it takes the
opportunity to replace the C-style (pointer, size) arguments by
'Byte_range_ptr' and 'Const_byte_range_ptr'.
Issue #4706
We determine the owner of a Vram object by the session cap of the
session that created the object. We should not copy this cap to other
places because this increases reference counting, that can become very
large with many objects. Therefore, we pass a wrapper 'Owner' object
containing the cap by reference.
issue #4713
Change the abstraction from buffers to video RAM (VRAM). The notion of
buffers can be provided at the client side (e.g., Mesa) and multiple
buffers can be there be associated to one VRAM area, thus saving
resources (meta data overhead) when allocating many buffers. A VRAM area
can also be mapped to one single buffer as before for clients or drivers
that do not take advantage of this feature.
issue #4713
This patch improves the Readonly_file::read method such that the
capacity of the specified buffer is used as upper bound for the read
operation instead of VFS-internal I/O buffer sizes. This relieves the
caller from implementing a read loop in most cases.
As a step away from C-ish use of the API, the patch deprecates the old
'read' method that takes the buffer as char *, size_t arguments.
Fixes#4745
The new utility returns a key code for a passed name and is implemented
by linear search, which is slow but sufficient in situations like config
updates.
Issue #4748
Up to now it was only checked if an issued admin command was processed
in a timely fashion. Otherwise it has been treated as failed.
However, the completion-queue entry was not examined and the caller was
not able to access the entry itself. Depending on the command, checking
the completion-queue entry might be necessary, e.g. GET/SET_FEATURE.
Issue #4715.
Since the 'Platform::Device' constructor will defer the creation until
the content of the devices ROM is valid performing the PRP list helper
creation afterwards should be done with valid IOMMU information.
Issue #4715.
* Update links from forward rules only with forward rules and links from
transport-routing rules only with transport-routing rules. Besides raising
the performance of the code, this also fixes a former bug that allowed
forward-rule links to falsely stay active because of a transport-routing
rule that matched the client destination ip and port.
* Don't use good-case exceptions for updating TCP/UDP links on re-configuration
of the router.
* Make conditions when to dismiss a forward rule easier to read.
* Introduces != operator to the public Port class in the net library.
* Fix unnecessary log message that a link was dismissed when only a potentially
matching forward rule turned out to be not matching.
* Apply Genode coding style to if statements with a single body statement.
Fix#4728
This fixes a bug that was introduced by this earlier commit:
"nic_router: find forward rules w/o exceptions"
The NIC router used to falsely dissolve TCP/UDP connection states when
reconfiguring although the connection states were still legal according to the
new config. The reason was that the above mention commit nested lambdas but
missed to return from the last nesting level when having found a configuration
that legitimates the connection state.
Ref #4728
The old 'Io_response_handler::io_progress_response' interface has been
replaced by the 'Vfs::Env::User::wakeup_vfs_user' (issue #4697). The
remaining 'read_ready_response' method is now hosted in the
appropriately named 'Read_ready_response_handler'.
Issue #4706
This commit supplements the various I/O signal handlers of the VFS
plugins with calls of the new 'Vfs::Env::User::wakeup_vfs_user'
interface, which will subsequently replace the old 'Io_progress_handler'
(issue #4697).
Issue #4706
When a domain receives a new dynamic router IP address and that domain has
active connection states (TCP/UDP/ICMP) from another domain with NAT applied,
the connection states used to stay active while becoming obsolete. They
become obsolete because their identification and their packet processor
use the old routers IP address due to NAT.
One consequence was that connections became dysfunctional when the server
domain received a new dynamic router IP address. Request packets were still
routed from client to server, but when entering the server, their source IP
address was the outdated router address. Consequently, the server responses
used the outdated address as destination and the router dropped the responses
because it did not know this address anymore.
This commit fixes the problem by letting a domain destroy all its connection
states that were initiated from within other domains whenever it detaches from
its current IP configuration.
Strictly speaking, it is not necessary to destroy all connection states, only
those that the domain applies NAT to. However, the Genode AVL tree is not built
for removing a selection of nodes and trying to do it anyways is complicated.
So, for now, we simply destroy all connection states.
Note that the other way around was handled correctly already. When a domain
detaches from its IP config, all interfaces of that domain destroy all the
connection states they created (towards other domains).
Fixes#4696
If the IP config does not change on updates to the router IP config of a domain
change (a common case on DHCP RENEW), prevent detaching from the old config and
attaching to the new one. Because this would not only create unnecessary CPU
overhead but also force all clients at all interfaces that are listening to
this config (via config attribute 'dns_config_from') to restart their
networking (re-do DHCP).
Ref #4696
By adding a 'write_ready' interface following the lines of the existing
'read_ready', VFS plugins become able to propagate the (de-)saturation
of I/O buffers to the VFS user. This information is important when using
a non-blocking file descriptor for writing into a TCP socket. Once the
application observes EAGAIN, it expects a subsequent 'select' call to
return as soon as new I/O buffer space becomes available.
Before this patch, the select call would always return under this
condition, causing an unnecessarily busy write loop.
Issue #4697
The new interface is meant to replace the 'Vfs::Io_response_handler'.
In contrast to the 'Io_response_handler', which had to be called
on a 'Vfs_handle', the new interface does not require any specific
'Vfs_handle'. It is merely meant to prompt the VFS user (like the libc)
to re-attempt stalled I/O operations but it does not provide any
immediate hint, about which of the handles have become ready for
reading/writing.
Issue #4697
This patch removes the 'Insufficient_buffer' exception by returning the
WRITE_ERR_WOULD_BLOCK result value instead. It also eliminates the
superfluous WRITE_ERR_AGAIN and WRITE_ERR_INTERRUPT codes.
Issue #4697
This patch fosters the batching of network packets transferred by the
lwIP stack over the NIC connection. It replaces the eager submission of
the packet-stream's data-flow signals by explicit wakeup notifications.
The commit also increases the NIC session's buffer size from 128 to 1024
packets.
Issue #4697
...and tighten constness in adjacent code parts.
The VFS-internal synchronization via mutexes is no longer needed because
the access to the VFS is serialized by the VFS client, i.e., the libc.
Issue #4697
This patch facilitates the batching of I/O operations in the VFS library
by replacing the implicit wakeup of remote peer (via the traditional
packet-stream interface like 'submit_packet') by explicit wakeup
signalling.
The wakeup signalling is triggered not before the VFS user settles down.
E.g., for libc-based applications, this is the case if the libc goes
idle, waiting for external I/O.
In the case of a busy writer to a non-blocking file descriptor or socket
(e.g., lighttpd), the remote peers are woken up once a write operation
yields an out-count of 0.
The deferring of wakeup signals is accommodated by the new 'Remote_io'
mechanism (vfs/remote_io.h) that is designated to be used by all VFS
plugins that interact with asynchronous Genode services for I/O.
Issue #4697
By replacing the calls of 'acknowledge_packet' and 'get_packet' with
'try_ack_packet' and 'try_get_packet', we avoid the implicit triggering
of data-flow signals. Instead, the VFS server now relies on explicit
calls of the packet stream's 'wakeup' interface.
Issue #4697
The change of the queue size from 16 to 32 has negligible costs (4 KiB
instead of 2 KiB for the packet-stream queues) while facilitating the
batching of many small consecutive write operations.
Issue #4697
Count more accurately how much packets are in flied, and whether
new packets can be handled. Moreover, catch potential exceptions
whenever acknowledging a packet, and warn about the lost acknowledgement.
Fixgenodelabs/genode#4678
This is required for scenarios in which a device appears at a later
point in time. If the ROM is not updated, the device_by_type() method may
operate on an outdated dataspace and never find the device it is waiting for.
