Commit Graph

26 Commits

Author SHA1 Message Date
Nathan Scott 01f5b89278 Pretty-print values in the PCP DynamicMeter code
Several improvements to the way values are displayed in the
PCP platform DynamicMeter implementation:
- handle the initial 'caption' setting as with regular meters,
  this required a new meter callback because we no longer have
  just a single meter caption for the DynamicMeter case
- if no label is provided for a metric in a configuration file
  use the short form metric name as a fallback
- honour the suffix setting in the configuration file
- convert metric values to the canonical units for htop (kbyte
  and seconds), and use Meter_humanUnit when it makes sense to
  do so.

Also improves the handling of fatal string error messages in a
couple of places, thanks to BenBE for the review feedback.
2021-07-08 10:56:05 +10:00
Nathan Scott 15a71f32fe Add more defensive checks to PCP paths if sampling fails 2021-07-07 14:00:36 +10:00
Sohaib Mohamed 93be3211ae PCP: use palette meter text colour for dynamic meter labels 2021-07-07 13:59:33 +10:00
Nathan Scott f0ed0fdafb Add a new DynamicMeter class for runtime Meter extension
This commit is based on exploratory work by Sohaib Mohamed.
The end goal is two-fold - to support addition of Meters we
build via configuration files for both the PCP platform and
for scripts ( https://github.com/htop-dev/htop/issues/526 )

Here, we focus on generic code and the PCP support.  A new
class DynamicMeter is introduced - it uses the special case
'param' field handling that previously was used only by the
CPUMeter, such that every runtime-configured Meter is given
a unique identifier.  Unlike with the CPUMeter this is used
internally only.  When reading/writing to htoprc instead of
CPU(N) - where N is an integer param (CPU number) - we use
the string name for each meter.  For example, if we have a
configuration for a DynamicMeter for some Redis metrics, we
might read and write "Dynamic(redis)".  This identifier is
subsequently matched (back) up to the configuration file so
we're able to re-create arbitrary user configurations.

The PCP platform configuration file format is fairly simple.
We expand configs from several directories, including the
users homedir alongside htoprc (below htop/meters/) and also
/etc/pcp/htop/meters.  The format will be described via a
new pcp-htop(5) man page, but its basically ini-style and
each Meter has one or more metric expressions associated, as
well as specifications for labels, color and so on via a dot
separated notation for individual metrics within the Meter.

A few initial sample configuration files are provided below
./pcp/meters that give the general idea.  The PCP "derived"
metric specification - see pmRegisterDerived(3) - is used
as the syntax for specifying metrics in PCP DynamicMeters.
2021-07-07 10:59:36 +10:00
Nathan Scott 865b85eb2d Fix an assert on kernel process name length on the PCP platform 2021-07-07 10:59:36 +10:00
Sohaib Mohamed ecb6a8da78 PCP: Fix minor cut+paste typo 2021-06-30 07:45:47 +02:00
Benny Baumann 1c0bd5155f PCP: Always update username 2021-06-22 09:32:11 +02:00
Nathan Scott e3d0fc1a5a Fix a PCP diagnostics typo, add missing pmFreeResult null check. 2021-06-13 19:51:00 +02:00
Nathan Scott 0bd1025e94 Resolve a couple of recent memory leaks in pcp-htop
Makes the pcp-htop binary valgrind-clean once more.
2021-06-13 19:51:00 +02:00
Nathan Scott 94d37989b4 Use macros to PCPProcessList value extraction, tweak configure.ac
Resolves a couple of remaining review notes from @BenBE.
2021-06-09 17:09:29 +10:00
Nathan Scott 144fd0a8d7 Update platform-specific header includes to use pcp paths.
Resolves a couple of remaining review notes from @BenBE.
2021-06-09 17:09:29 +10:00
Nathan Scott 4bcb5d116b Update the PCP platform to use common Process fields and code
Remove code now that we have common platform-independent command
line wrangling (thanks BenBE!).  Add PCP platform support for a
handful of other recently arriving odds and ends - ELAPSED time,
CWD, and so on.
2021-06-09 17:09:29 +10:00
Nathan Scott 4d7cee56f0 Rework TTY column for the PCP platform 2021-06-09 17:09:29 +10:00
Nathan Scott 9ce9557e69 Various code tidyups based on review commentary from BenBE 2021-06-09 17:09:29 +10:00
Nathan Scott b232119e4b Resolve some Coverity scan misfires in PCP platform code 2021-06-09 17:09:29 +10:00
Nathan Scott da454997bf Remove dynamic allocation of PCP metric atomvalues expansion
This is no longer used and confuses Coverity scans, drop it.
2021-06-09 17:09:29 +10:00
Nathan Scott d4a2587568 Add time handling interfaces for the pcp platform
Related to https://github.com/htop-dev/htop/pull/574
2021-06-09 17:09:29 +10:00
Nathan Scott 5dfb524237 Implement command line and environment handling for pcp htop. 2021-06-09 17:09:29 +10:00
Nathan Scott b424a5b137 Implement shared memory support on the PCP platform
Uses the mem.util.shared metric (Shmem from meminfo).
2021-06-09 17:09:29 +10:00
Nathan Scott d3af4e670d Update PCP platform to use the old hostname API call
Fixes CI builds which are on an old version of PCP.
2021-06-09 17:09:29 +10:00
Nathan Scott 956b2ae70c Update PCP platform to match latest API changes
Updates for recent NetworkIO Meter changes, adds support
for the SysArch and HostName Meters.  The SysArch change
is based on work originally by Sohaib Mohamed.
2021-06-09 17:09:29 +10:00
Nathan Scott c6f20fbcc6 Fixes and cleanups for ZFS Meters and metrics 2021-06-09 17:09:29 +10:00
Nathan Scott 0e7ae9a592 Ensure PCP platform ZramMeter always uses initialized data 2021-06-09 17:09:29 +10:00
Sohaib 407d32e121 Fix PCP ZramMeter in presense of missing zram metrics 2021-06-09 17:09:29 +10:00
Sohaib e1d1a5cec6 Add ZFS ARC statistics and meters to the PCP platform 2021-06-09 17:09:29 +10:00
Nathan Scott c14a45ba35 Add a platform for Performance Co-Pilot (PCP) metrics
This introduces an initial platform for extracting metrics
using the PCP performance metrics API - PMAPI(3).  It can
be used via the --enable-pcp=yes configure option.

So far I've added support for live localhost metrics only,
and only using pre-defined metrics already found in htop.
If available, all sampling is performed by pmcd(1) - else,
we fallback to htop doing the metric sampling itself (all
below the PMAPI).  When pmcd is used, it may be configured
to run children with elevated privileges, so htop does not
need to be setuid (authentication with pmcd is available).

Additionally, the PMAPI allows us to support archives (for
historical analysis and for automated regression tests in
htop).  We'll need platform-specific command line argument
additions, which isn't yet feasible in htop (not difficult
to add though).

The goal of this first version is minimal impact in terms
of modifying the htop codebase, to introduce key ideas in
PCP (metric namespace, metadata, APIs and so on) and give
us something to discuss, experiment with and build on.
2021-06-09 17:09:29 +10:00