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author | Nathan Scott <nathans@redhat.com> | 2021-06-23 17:44:56 +1000 |
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committer | Nathan Scott <nathans@redhat.com> | 2021-07-07 10:59:36 +1000 |
commit | f0ed0fdafb9ecefc9d103ffb8f5d91bf723518f6 (patch) | |
tree | 8f82bf54c96a07d8efa5c9a8bd2c50865bd6757a /ProcessList.c | |
parent | 865b85eb2d31321e9c37334838fa514ac348d61a (diff) |
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.
Diffstat (limited to 'ProcessList.c')
-rw-r--r-- | ProcessList.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/ProcessList.c b/ProcessList.c index da5d7a91..82f719f8 100644 --- a/ProcessList.c +++ b/ProcessList.c @@ -19,7 +19,7 @@ in the source distribution for its full text. #include "XUtils.h" -ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId) { +ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* pidMatchList, uid_t userId) { this->processes = Vector_new(klass, true, DEFAULT_SIZE); this->processes2 = Vector_new(klass, true, DEFAULT_SIZE); // tree-view auxiliary buffer @@ -29,6 +29,7 @@ ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, Users this->usersTable = usersTable; this->pidMatchList = pidMatchList; + this->dynamicMeters = dynamicMeters; this->userId = userId; |