From d7093b894ee00a11e2fdf21c859215fcf535b2de Mon Sep 17 00:00:00 2001
From: nocjj <1250062498@qq.com>
Date: Thu, 29 Oct 2020 14:08:47 +0800
Subject: [PATCH 1/8] vcp_stat: add Max Scheduling Delay time items to display

Add WAITmax item to display, which represent "Max Scheduling Delay".
Set default width to 9 spaces, and default hidden.
And WAITmax unit is ms.

Signed-off-by: Jiajun Chen <1250062498@qq.com>
---
 src/field.c     | 4 +++-
 src/field.h     | 1 +
 src/vcpu_stat.c | 1 +
 src/vmtop.c     | 6 ++++++
 4 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/field.c b/src/field.c
index 8793977..7ff0d44 100644
--- a/src/field.c
+++ b/src/field.c
@@ -67,8 +67,10 @@ FID fields[] = {
     {"P",        FIELDS_DISPLAY, 5,  GF(processor)                },
     {"%ST",      FIELDS_DISPLAY, 8,  GDF(steal)                   },
     {"%GUE",     FIELDS_DISPLAY, 8,  GDF(gtime)                   },
-    {"%HYP",     FIELDS_DISPLAY, 8,  NULL                         }
+    {"%HYP",     FIELDS_DISPLAY, 8,  NULL                         },
+    {"WAITmax",  FIELDS_HIDDEN,  9,  GF(st_max)                   }
 #undef GDF
+#undef GF
 };
 
 int get_show_field_num(void)
diff --git a/src/field.h b/src/field.h
index 1fc7182..3a33008 100644
--- a/src/field.h
+++ b/src/field.h
@@ -47,6 +47,7 @@ enum fields_type {
     FD_ST,
     FD_GUE,
     FD_HYP,
+    FD_WAITMAX,
     FD_END
 };
 
diff --git a/src/vcpu_stat.c b/src/vcpu_stat.c
index 7ec2371..308e7bb 100644
--- a/src/vcpu_stat.c
+++ b/src/vcpu_stat.c
@@ -115,4 +115,5 @@ void sum_vcpu_stat(struct domain *dom, struct domain *thread)
             (*vcpu_stat_stab[i].sum_fun)(dom, thread);
         }
     }
+    dom->st_max += thread->st_max;
 }
diff --git a/src/vmtop.c b/src/vmtop.c
index d22ddfd..27126b9 100644
--- a/src/vmtop.c
+++ b/src/vmtop.c
@@ -234,6 +234,12 @@ static void print_domain_field(struct domain *dom, int field)
         print_scr("%*.1f", fields[i].align, justify_usage(usage, dom));
         break;
     }
+    case FD_WAITMAX: {
+        u64 st_max = *(u64 *)(*fields[i].get_fun)(dom);
+        /* show Max Scheduling Delay time in ms unit */
+        print_scr("%*.3f", fields[i].align, st_max / 1000000.0f);
+        break;
+    }
     default:
         break;
     }
-- 
2.27.0