From 767203fe3ee4011a32b11925640446b3ada8b606 Mon Sep 17 00:00:00 2001
From: Ilya Mashchenko <ilya@netdata.cloud>
Date: Tue, 28 Sep 2021 10:16:27 +0300
Subject: add proc_softirqs charts info (#11577)

---
 web/gui/dashboard_info.js | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

(limited to 'web')

diff --git a/web/gui/dashboard_info.js b/web/gui/dashboard_info.js
index 77eaf3cfcb..b95e2ac8fc 100644
--- a/web/gui/dashboard_info.js
+++ b/web/gui/dashboard_info.js
@@ -930,6 +930,21 @@ netdataDashboard.submenu = {
         '<b>software</b> (generated by programs when they want to request a system call to be performed by the operating system), and '+
         '<b>traps</b> (generated by the CPU itself to indicate that some error or condition occurred for which assistance from the operating system is needed).'
     },
+
+    'system.softirqs': {
+        info: 'Software interrupts (or "softirqs") are one of the oldest deferred-execution mechanisms in the kernel. '+
+        'Several tasks among those executed by the kernel are not critical: '+
+        'they can be deferred for a long period of time, if necessary. '+
+        'The deferrable tasks can execute with all interrupts enabled '+
+        '(softirqs are patterned after hardware interrupts). '+
+        'Taking them out of the interrupt handler helps keep kernel response time small.'
+    },
+
+    'cpu.softirqs': {
+        info: 'Total number of software interrupts per CPU. '+
+        'To see the total number for the system check the <a href="#menu_system_submenu_softirqs">softirqs</a> section.'
+    },
+
     'cpu.interrupts': {
         info: 'Total number of interrupts per CPU. '+
         'To see the total number for the system check the <a href="#menu_system_submenu_interrupts">interrupts</a> section. '+
@@ -1047,7 +1062,18 @@ netdataDashboard.context = {
     },
 
     'system.softirqs': {
-        info: 'CPU softirqs in detail. At the <a href="#menu_cpu">CPUs</a> section, softirqs are analyzed per CPU core.'
+        info: '<p>Total number of software interrupts in the system. '+
+        'At the <a href="#menu_cpu">CPUs</a> section, softirqs are analyzed <a href="#menu_cpu_submenu_softirqs">per CPU core</a>.</p>'+
+        '<p><b>HI</b> - high priority tasklets. '+
+        '<b>TIMER</b> - tasklets related to timer interrupts. '+
+        '<b>NET_TX</b>, <b>NET_RX</b> - used for network transmit and receive processing. '+
+        '<b>BLOCK</b> - handles block I/O completion events. '+
+        '<b>IRQ_POLL</b> - used by the IO subsystem to increase performance (a NAPI like approach for block devices). '+
+        '<b>TASKLET</b> - handles regular tasklets. '+
+        '<b>SCHED</b> - used by the scheduler to perform load-balancing and other scheduling tasks. '+
+        '<b>HRTIMER</b> - used for high-resolution timers. '+
+        '<b>RCU</b> - performs read-copy-update (RCU) processing.</p>'
+
     },
 
     'system.softirq_latency': {
-- 
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