SCI Threshold Should be Warning instead of Error
Bug #2115132 reported by
Paul Alappat
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Firmware Test Suite |
Won't Fix
|
High
|
Ivan Hu | ||
Bug Description
Hello, I would like to know which spec and section of that spec defines that the ACPI SCI threshold is 30 per second. I have seen this issue reported by FWTS Version V25.01.00 but I am unable to determine why this is an issue and where it is defined in a spec.
interrupt: Interrupt tests.
Test 1 of 1: Check whether ACPI SCI is triggered excessively.
ACPI SCIs per second are 59.
FAILED [HIGH] ACPI SCIs per second are above threshold 30.
I believe this is not actually an error but should be a warning instead since I don't believe it's defined in the ACPI spec that the value must be 30 or below.
| Changed in fwts: | |
| assignee: | nobody → Ivan Hu (ivan.hu) |
| importance: | Undecided → High |
| status: | New → In Progress |
Revision history for this message
| Ivan Hu (ivan.hu) wrote | #1 |
| Changed in fwts: | |
| status: | In Progress → Won't Fix |
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It is correct, the "30 SCI/sec" threshold isn't written in the ACPI specification itself.
Instead, it's a practical limit used by diagnostic tools like FWTS to detect a common but serious problem known as an "interrupt storm" (over 1800/min). When a system constantly generates that many interrupts, it's a clear sign of a firmware bug that causes noticeable slowdowns and poor battery life.
That's why it's treated as a FAILED [HIGH] error rather than a simple warning. It's a real-world issue that needs to be fixed in the system's BIOS/UEFI.