diff options
author | Nathan Scott <nathans@redhat.com> | 2021-06-23 17:44:56 +1000 |
---|---|---|
committer | Nathan Scott <nathans@redhat.com> | 2021-07-07 10:59:36 +1000 |
commit | f0ed0fdafb9ecefc9d103ffb8f5d91bf723518f6 (patch) | |
tree | 8f82bf54c96a07d8efa5c9a8bd2c50865bd6757a /dragonflybsd | |
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 'dragonflybsd')
-rw-r--r-- | dragonflybsd/DragonFlyBSDProcessList.c | 4 | ||||
-rw-r--r-- | dragonflybsd/Platform.h | 8 |
2 files changed, 10 insertions, 2 deletions
diff --git a/dragonflybsd/DragonFlyBSDProcessList.c b/dragonflybsd/DragonFlyBSDProcessList.c index 200491ec..9bf6ffef 100644 --- a/dragonflybsd/DragonFlyBSDProcessList.c +++ b/dragonflybsd/DragonFlyBSDProcessList.c @@ -42,12 +42,12 @@ static int MIB_kern_cp_time[2]; static int MIB_kern_cp_times[2]; static int kernelFScale; -ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId) { +ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* pidMatchList, uid_t userId) { size_t len; char errbuf[_POSIX2_LINE_MAX]; DragonFlyBSDProcessList* dfpl = xCalloc(1, sizeof(DragonFlyBSDProcessList)); ProcessList* pl = (ProcessList*) dfpl; - ProcessList_init(pl, Class(DragonFlyBSDProcess), usersTable, pidMatchList, userId); + ProcessList_init(pl, Class(DragonFlyBSDProcess), usersTable, dynamicMeters, pidMatchList, userId); // physical memory in system: hw.physmem // physical page size: hw.pagesize diff --git a/dragonflybsd/Platform.h b/dragonflybsd/Platform.h index e5402c00..04c54555 100644 --- a/dragonflybsd/Platform.h +++ b/dragonflybsd/Platform.h @@ -89,4 +89,12 @@ static inline void Platform_gettime_monotonic(uint64_t* msec) { Generic_gettime_monotonic(msec); } +static inline Hashtable* Platform_dynamicMeters(void) { return NULL; } + +static inline void Platform_dynamicMeterInit(ATTR_UNUSED Meter* meter) { } + +static inline void Platform_dynamicMeterUpdateValues(ATTR_UNUSED Meter* meter) { } + +static inline void Platform_dynamicMeterDisplay(ATTR_UNUSED const Meter* meter, ATTR_UNUSED RichString* out) { } + #endif |