[pve-devel] [PATCH common v2] ProcFSTools: read_proc_stat: add more cpu stats from /proc/stat

[Dominik Csapak <d.csapak@proxmox.com>]

those fields might be interesting to users. At the moment, this is
only used in the external metrics export.

These fields exist in the kernel since:
* irq - 2.6.0
* softirq - 2.6.0
* steal - 2.6.11
* guest - 2.6.24
* guest_nice - 2.6.33

so they must all exist

also add a 'total' field which simply sums up the (non-guest) fields

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
changes from v1:
* made the new fields non-optional (new kernel is a hard req.)
* added a new 'total' field which is the same as in pbs

 src/PVE/ProcFSTools.pm | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/PVE/ProcFSTools.pm b/src/PVE/ProcFSTools.pm
index ff30e4b..a75274a 100644
--- a/src/PVE/ProcFSTools.pm
+++ b/src/PVE/ProcFSTools.pm
@@ -168,13 +168,18 @@ sub read_proc_stat {
 
     if (my $fh = IO::File->new ("/proc/stat", "r")) {
 	while (defined (my $line = <$fh>)) {
-	    if ($line =~ m|^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s|) {
+	    if ($line =~ m|^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)|) {
 		$res->{user} = $1;
 		$res->{nice} = $2;
 		$res->{system} = $3;
 		$res->{idle} = $4;
 		$res->{used} = $1+$2+$3;
 		$res->{iowait} = $5;
+		$res->{irq} = $6;
+		$res->{softirq} = $7;
+		$res->{steal} = $8;
+		$res->{guest} = $9;
+		$res->{guest_nice} = $10;
 	    } elsif ($line =~ m|^cpu\d+\s|) {
 		$cpucount++;
 	    }
@@ -186,6 +191,16 @@ sub read_proc_stat {
 
     my $ctime = gettimeofday; # floating point time in seconds
 
+    # the sum of all (non-guest) fields
+    $res->{total} = $res->{user}
+	+ $res->{nice}
+	+ $res->{system}
+	+ $res->{iowait}
+	+ $res->{irq}
+	+ $res->{softirq}
+	+ $res->{steal}
+	+ $res->{idle};
+
     $res->{ctime} = $ctime;
     $res->{cpu} = 0;
     $res->{wait} = 0;
-- 
2.30.2