Add support for scheduling policies

Add a process column for scheduling policy to show the current
scheduling policy of the process.

Add a the ability to change the scheduling policy of a process via the
key 'Y'.

Currently implemented on Linux and FreeBSD only but should be portable,
since sched_getscheduler(2) is part of POSIX.1-2001.

Closes: #1161

2 files changed, 10 insertions, 0 deletions

diff --git a/freebsd/FreeBSDProcess.c b/freebsd/FreeBSDProcess.c
index 4eccfe7f..90bc1f2c 100644
--- a/freebsd/FreeBSDProcess.c
+++ b/freebsd/FreeBSDProcess.c
@@ -13,6 +13,7 @@ in the source distribution for its full text.
 #include "Macros.h"
 #include "Process.h"
 #include "RichString.h"
+#include "Scheduling.h"
 #include "XUtils.h"
 
 
@@ -47,6 +48,9 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [PROC_COMM] = { .name = "COMM", .title = "COMM            ", .description = "comm string of the process", .flags = 0, },
    [PROC_EXE] = { .name = "EXE", .title = "EXE             ", .description = "Basename of exe of the process", .flags = 0, },
    [CWD] = { .name = "CWD", .title = "CWD                       ", .description = "The current working directory of the process", .flags = PROCESS_FLAG_CWD, },
+#ifdef SCHEDULER_SUPPORT
+   [SCHEDULERPOLICY] = { .name = "SCHEDULERPOLICY", .title = "SCHED ", .description = "Current scheduling policy of the process", .flags = PROCESS_FLAG_SCHEDPOL, },
+#endif
    [JID] = { .name = "JID", .title = "JID", .description = "Jail prison ID", .flags = 0, .pidColumn = true, },
    [JAIL] = { .name = "JAIL", .title = "JAIL        ", .description = "Jail prison name", .flags = 0, },
    [EMULATION] = { .name = "EMULATION", .title = "EMULATION        ", .description = "System call emulation environment (ABI)", .flags = 0, },
diff --git a/freebsd/FreeBSDProcessList.c b/freebsd/FreeBSDProcessList.c
index 9ee5ea40..98447df9 100644
--- a/freebsd/FreeBSDProcessList.c
+++ b/freebsd/FreeBSDProcessList.c
@@ -34,6 +34,7 @@ in the source distribution for its full text.
 #include "Object.h"
 #include "Process.h"
 #include "ProcessList.h"
+#include "Scheduling.h"
 #include "Settings.h"
 #include "XUtils.h"
 #include "generic/openzfs_sysctl.h"
@@ -606,6 +607,11 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
       if (Process_isKernelThread(proc))
          super->kernelThreads++;
 
+#ifdef SCHEDULER_SUPPORT
+      if (settings->ss->flags & PROCESS_FLAG_SCHEDPOL)
+         Scheduling_readProcessPolicy(proc);
+#endif
+
       proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc)));
 
       super->totalTasks++;