commit 9a5fac9a36341542bf6b658a41a0a1319c360ce4
author Deepak Kamat <dkamat@nvidia.com> Wed Mar 26 10:29:29 2025 +0530
committer Deepak Kamat <dkamat@nvidia.com> Fri May 02 08:20:56 2025 +0000
tree 146007d169203a989af4fca05e873363179a3723
parent 73cec52d519c4697df8495244da39279a7c7ed8e

Dreport: Add SoftIRQ Information Collection

Add functionality to collect softIRQ statistics as part of the debug
data collection process. The new file will contain:

- softIRQs: Software interrupt statistics including counts and
  processing details

Including this information in debug reports will enhance
troubleshooting capabilities for system performance and resource
utilization in OpenBMC based systems. It provides a snapshot of
software interrupt processing activity at the time of report generation.

This addition will help identify potential bottlenecks and excessive
softIRQ activity that may impact system performance or stability,
particularly for network stack processing, timers, and tasklet
execution analysis.

Tested on the qemuarm platform.

'''
Dump size: 82k
Untar Dump Size: 936K
Added File Size: 282 bytes
Time for the Dump Completion: 15sec
Time for the command to run: 0.038s

Data can be used like
Network Analysis (NET_RX/NET_TX)
NET_RX: 170 suggests:
170 packets received via network interfaces during collection
Potential issues if:
Counts increase without traffic
Asymmetry between NET_RX and actual received packets (ifconfig/ethtool)

root@qemuarm:~# busctl call xyz.openbmc_project.Dump.Manager /xyz/openbmc_project/dump/bmc xyz.openbmc_project.Dump.Create CreateDump a{sv} 1 "i" i 1234

root@qemuarm:~# journalctl -f -u xyz.openbmc_project.Dump.Manager
...
Mar 26 04:09:34 qemuarm phosphor-dump-manager[220]: OriginatorId is not provided
Mar 26 04:09:34 qemuarm phosphor-dump-manager[220]: OriginatorType is not provided. Replacing the string with the default value
Mar 26 04:09:34 qemuarm phosphor-dump-manager[220]: Initiating new BMC dump with type: user path:
...
Mar 26 04:09:49 qemuarm phosphor-dump-manager[304]: Wed Mar 26 04:09:49 UTC 2025 Report is available in /var/lib/phosphor-debug-collector/dumps/1
Mar 26 04:09:49 qemuarm phosphor-dump-manager[304]: Wed Mar 26 04:09:49 UTC 2025 Successfully completed
Mar 26 04:09:49 qemuarm phosphor-dump-manager[220]: User initiated dump completed, resetting flag

root@qemuarm:~# time cat /proc/softirqs
...
real    0m0.038s
user    0m0.021s
sys     0m0.002s
root@qemuarm:~#

ls -lrth obmcdump_1_1742962174.tar.xz
-rw-r--r-- 1 dkamat domain-users 82K Mar 26 10:16 obmcdump_1_1742962174.tar.xz

ls -lrth obmcdump_1_1742962174/
total 936K
-rw-r--r-- 1 dkamat domain-users  223 Mar 26 09:39 summary.log
...
-rw-r--r-- 1 dkamat domain-users  282 Mar 26 09:39 softIRQs.log

cat obmcdump_1_1742962174/softIRQs.log | head
                    CPU0
          HI:          0
       TIMER:       4457
      NET_TX:          3
      NET_RX:        170
       BLOCK:          0
    IRQ_POLL:          0
     TASKLET:          1
       SCHED:          0
     HRTIMER:          0
'''

Change-Id: I154e9a4ddfad4099ea57d31fb689ac9eefdda8e7
Signed-off-by: Deepak Kamat <dkamat@nvidia.com>