From f0ed0fdafb9ecefc9d103ffb8f5d91bf723518f6 Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Wed, 23 Jun 2021 17:44:56 +1000 Subject: 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. --- darwin/DarwinProcessList.c | 4 ++-- darwin/DarwinProcessList.h | 2 +- darwin/Platform.h | 8 ++++++++ 3 files changed, 11 insertions(+), 3 deletions(-) (limited to 'darwin') diff --git a/darwin/DarwinProcessList.c b/darwin/DarwinProcessList.c index 900677ae..91d62c4a 100644 --- a/darwin/DarwinProcessList.c +++ b/darwin/DarwinProcessList.c @@ -128,10 +128,10 @@ static struct kinfo_proc* ProcessList_getKInfoProcs(size_t* count) { CRT_fatalError("Unable to get kinfo_procs"); } -ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId) { +ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* pidMatchList, uid_t userId) { DarwinProcessList* this = xCalloc(1, sizeof(DarwinProcessList)); - ProcessList_init(&this->super, Class(DarwinProcess), usersTable, pidMatchList, userId); + ProcessList_init(&this->super, Class(DarwinProcess), usersTable, dynamicMeters, pidMatchList, userId); /* Initialize the CPU information */ this->super.cpuCount = ProcessList_allocateCPULoadInfo(&this->prev_load); diff --git a/darwin/DarwinProcessList.h b/darwin/DarwinProcessList.h index 1ae2f2b9..bd39ab0e 100644 --- a/darwin/DarwinProcessList.h +++ b/darwin/DarwinProcessList.h @@ -28,7 +28,7 @@ typedef struct DarwinProcessList_ { ZfsArcStats zfs; } DarwinProcessList; -ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId); +ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* pidMatchList, uid_t userId); void ProcessList_delete(ProcessList* this); diff --git a/darwin/Platform.h b/darwin/Platform.h index 694fd7dc..c0743f1c 100644 --- a/darwin/Platform.h +++ b/darwin/Platform.h @@ -92,4 +92,12 @@ static inline void Platform_gettime_realtime(struct timeval* tv, uint64_t* msec) void Platform_gettime_monotonic(uint64_t* 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 -- cgit v1.2.3