[pve-devel] [PATCH pve-common 2/4] read_proc_stat: substract guest && guest_nice from user && nice time

Alexandre Derumier aderumier at odiso.com
Mon Jan 10 05:52:58 CET 2022


user && nice time already include guest value
https://github.com/torvalds/linux/blob/4ec9f7a18/kernel/sched/cputime.c#L151-L158

Other monitoring tools are already substracting theses guest values

https://github.com/htop-dev/htop/blob/main/linux/LinuxProcessList.c
https://github.com/influxdata/telegraf/blob/c66ccee46f47717c399ccc0348d17c95d11f477d/plugins/inputs/cpu/cpu.go
---
 src/PVE/ProcFSTools.pm | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/PVE/ProcFSTools.pm b/src/PVE/ProcFSTools.pm
index c816131..79d4a4c 100644
--- a/src/PVE/ProcFSTools.pm
+++ b/src/PVE/ProcFSTools.pm
@@ -169,8 +169,8 @@ 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+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)|) {
-		$res->{user} = $1;
-		$res->{nice} = $2;
+		$res->{user} = $1 - $9;
+		$res->{nice} = $2 - $10;
 		$res->{system} = $3;
 		$res->{idle} = $4;
 		$res->{used} = $1+$2+$3;
@@ -191,7 +191,7 @@ sub read_proc_stat {
 
     my $ctime = gettimeofday; # floating point time in seconds
 
-    # the sum of all (non-guest) fields
+    # the sum of all fields
     $res->{total} = $res->{user}
 	+ $res->{nice}
 	+ $res->{system}
@@ -199,7 +199,9 @@ sub read_proc_stat {
 	+ $res->{irq}
 	+ $res->{softirq}
 	+ $res->{steal}
-	+ $res->{idle};
+	+ $res->{idle}
+	+ $res->{guest}
+	+ $res->{guest_nice};
 
     $res->{ctime} = $ctime;
     $res->{cpu} = 0;
-- 
2.30.2




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