diff options
author | Sohaib Mohamed <sohaib.amhmd@gmail.com> | 2021-07-11 03:11:29 +0200 |
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committer | Nathan Scott <nathans@redhat.com> | 2021-08-13 07:32:57 +0200 |
commit | 6f2021f3d95e02fc54e59fdeeb006e34c209b9c3 (patch) | |
tree | a31ea1264b871e5a7e7785398a382a7813eb1749 /ProcessList.c | |
parent | ed82ce6456f0f904a0ab2b346b85d7cf46df109c (diff) |
PCP: support for 'dynamic columns' added at runtime
Implements support for arbitrary Performance Co-Pilot
metrics with per-process instance domains to form new
htop columns. The column-to-metric mappings are setup
using configuration files which will be documented via
man pages as part of a follow-up commit.
We provide an initial set of column configurations so
as to provide new capabilities to pcp-htop: including
configs for containers, open fd counts, scheduler run
queue time, tcp/udp bytes/calls sent/recv, delay acct,
virtual machine guests, detailed virtual memory, swap.
Note there is a change to the configuration file path
resolution algorithm introduced for 'dynamic meters'.
First, look in any custom PCP_HTOP_DIR location. Then
iterate, in priority order, users home directory, then
local sysadmins files in /etc/pcp/htop, then readonly
configuration files below /usr/share/pcp/htop. This
final location becomes the preferred place for our own
shipped meter and column files.
The Settings file (htoprc) writing code is updated to
not using the numeric identifier for dynamic columns.
The same strategy used for dynamic meters is used here
where we write Dynamic(name) so the name can be setup
once more at start. Regular (static) columns writing
to htoprc - i.e. numerically indexed - is unchanged.
Diffstat (limited to 'ProcessList.c')
-rw-r--r-- | ProcessList.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/ProcessList.c b/ProcessList.c index 8ab4d8f6..daf871a7 100644 --- a/ProcessList.c +++ b/ProcessList.c @@ -12,6 +12,7 @@ in the source distribution for its full text. #include <string.h> #include "CRT.h" +#include "DynamicColumn.h" #include "Hashtable.h" #include "Macros.h" #include "Platform.h" @@ -19,7 +20,7 @@ in the source distribution for its full text. #include "XUtils.h" -ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* pidMatchList, uid_t userId) { +ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, 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 @@ -30,6 +31,7 @@ ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, Users this->usersTable = usersTable; this->pidMatchList = pidMatchList; this->dynamicMeters = dynamicMeters; + this->dynamicColumns = dynamicColumns; this->userId = userId; @@ -83,7 +85,22 @@ void ProcessList_setPanel(ProcessList* this, Panel* panel) { this->panel = panel; } -static const char* alignedProcessFieldTitle(ProcessField field) { +static const char* alignedDynamicColumnTitle(const ProcessList* this, int key) { + const DynamicColumn* column = Hashtable_get(this->dynamicColumns, key); + if (column == NULL) + return "- "; + static char titleBuffer[DYNAMIC_MAX_COLUMN_WIDTH + /* space */ 1 + /* null terminator */ + 1]; + int width = column->width; + if (!width || abs(width) > DYNAMIC_MAX_COLUMN_WIDTH) + width = DYNAMIC_DEFAULT_COLUMN_WIDTH; + xSnprintf(titleBuffer, sizeof(titleBuffer), "%*s", width, column->heading); + return titleBuffer; +} + +static const char* alignedProcessFieldTitle(const ProcessList* this, ProcessField field) { + if (field >= LAST_PROCESSFIELD) + return alignedDynamicColumnTitle(this, field); + const char* title = Process_fields[field].title; if (!title) return "- "; @@ -115,7 +132,7 @@ void ProcessList_printHeader(const ProcessList* this, RichString* header) { color = CRT_colors[PANEL_HEADER_FOCUS]; } - RichString_appendWide(header, color, alignedProcessFieldTitle(fields[i])); + RichString_appendWide(header, color, alignedProcessFieldTitle(this, fields[i])); if (key == fields[i] && RichString_getCharVal(*header, RichString_size(header) - 1) == ' ') { RichString_rewind(header, 1); // rewind to override space RichString_appendnWide(header, @@ -478,7 +495,7 @@ ProcessField ProcessList_keyAt(const ProcessList* this, int at) { const ProcessField* fields = this->settings->fields; ProcessField field; for (int i = 0; (field = fields[i]); i++) { - int len = strlen(alignedProcessFieldTitle(field)); + int len = strlen(alignedProcessFieldTitle(this, field)); if (at >= x && at <= x + len) { return field; } |