Process command line reading took up 50% (!) of all of SystemMonitor's
work. However, a process's command line per definition never changes, so
we can read it once and carry it over. Also, if we couldn't read a
process's command line once, it is close to impossible that we'll ever
be able to read it in the future. Therefore, skip reading such command
lines again as well.
This commit also converts the command line itself to use String, while
we're at it.
The signature of Core::ProcessStatisticsReader::get_all changed, and
instead of requiring a pointer to an open file, it now needs a bool to
indicate whether usernames should be polled or not. `m_proc_all` was
always converted to `false` in `RefPtr::operator bool()`, so we were
missing usernames for a long time.
This class had slightly confusing semantics and the added weirdness
doesn't seem worth it just so we can say "." instead of "->" when
iterating over a vector of NNRPs.
This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
Save the columns configuration from the last run in the respective
config file, and add a function to check whether a column should be
visible by default.
Having bogus values here when we just initialize the thread state with a
process can lead to all sorts of bad things down the line, like infinite
draws.
In the process model we check the thread with tid=pid to figure out the
main thread of a process. This is used to construct the process view
tree with non-main threads listed as children of the process row.
However, there are sometimes circumstances where there is no main
thread, even though the process should have been removed from the
internal list by then. As a safe fallback, let's default to an invalid
model index if we can't figure out what the main thread of a process is.
This shows all non-main threads as children of the process they belong
to. We also show the TID as that is important to distinguish the
different threads in one process.
Fixes#65
:skeleyak:
Most of the models were just calling did_update anyway, which is
pointless since it can be unified to the base Model class. Instead, code
calling update() will now call invalidate(), which functions identically
and is more obvious in what it does.
Additionally, a default implementation is provided, which removes the
need to add empty implementations of update() for each model subclass.
Co-Authored-By: Ali Mohammad Pur <ali.mpfard@gmail.com>
This switches tracking CPU usage to more accurately measure time in
user and kernel land using either the TSC or another time source.
This will also come in handy when implementing a tickless kernel mode.
As threads come and go, we can't simply account for how many time
slices the threads at any given point may have been using. We need to
also account for threads that have since disappeared. This means we
also need to track how many time slices we have expired globally.
However, because this doesn't account for context switches outside of
the system timer tick values may still be under-reported. To solve this
we will need to track more accurate time information on each context
switch.
This also fixes top's cpu usage calculation which was still based on
the number of context switches.
Fixes#6473
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
And delete the generic icon member which has been dormant since
switching to FileIconProvider. Fixes icon column not being properly
painted as icon cells.
