Microsoft-Windows-Kernel-CPU-Starvation

4 events across 1 channel

Event	Title	Channel	Sample
1	CPU CpuNumber exceeded its single DPC soft timeout of SoftTimeoutTicks clock …	Operational	N
2	CPU CpuNumber exceeded its cumulative DPC soft timeout of …	Operational	N
3	Thread DpcSequenceNumber on CPU ThresholdTicks exceeded the threshold of …	Operational	N
4	Capture DPC sequence number DpcSequenceNumber at tick Tick.	Operational	N

Event ID 1: CPU CpuNumber exceeded its single DPC soft timeout of SoftTimeoutTicks clock ticks.

Provider: Microsoft-Windows-Kernel-CPU-Starvation
Channel: Operational
Task: DPCSoftTimeout
Opcode: SingleDPCSoftTimeoutReached

Description

CPU CpuNumber exceeded its single DPC soft timeout of SoftTimeoutTicks clock ticks. A single DPC in module ModuleName, with key DpcRoutineKey, ran for TickCount clock ticks on the thread with TID ThreadID.

Message #

CPU %3 exceeded its single DPC soft timeout of %5 clock ticks. A single DPC in module %7, with key %1, ran for %4 clock ticks on the thread with TID %2.

Fields #

Name	Description
`DpcRoutineKey` Pointer
`ThreadID` UInt32
`CpuNumber` UInt32
`TickCount` UInt32
`SoftTimeoutTicks` UInt32
`ModuleNameLength` UInt16
`ModuleName` UnicodeString

Event ID 2: CPU CpuNumber exceeded its cumulative DPC soft timeout of CumulativeSoftTimeoutTicks clock ticks, by running at an IRQL greater than or equal to DISPATCH_LEVEL for CumulativeTickCount clock ticks...

Provider: Microsoft-Windows-Kernel-CPU-Starvation
Channel: Operational
Task: DPCSoftTimeout
Opcode: CumulativeDPCSoftTimeoutReached

Description

CPU CpuNumber exceeded its cumulative DPC soft timeout of CumulativeSoftTimeoutTicks clock ticks, by running at an IRQL greater than or equal to DISPATCH_LEVEL for CumulativeTickCount clock ticks on the thread with TID ThreadID.

Message #

CPU %2 exceeded its cumulative DPC soft timeout of %4 clock ticks, by running at an IRQL greater than or equal to DISPATCH_LEVEL for %3 clock ticks on the thread with TID %1.

Fields #

Name	Description
`ThreadID` UInt32
`CpuNumber` UInt32
`CumulativeTickCount` UInt32
`CumulativeSoftTimeoutTicks` UInt32

Event ID 3: Thread DpcSequenceNumber on CPU ThresholdTicks exceeded the threshold of CumulativeTickCount ticks running at DISPATCH_LEVEL or higher, profiling started with sequence number SingleTickCount.

Provider: Microsoft-Windows-Kernel-CPU-Starvation
Channel: Operational
Task: DPCProfiling
Opcode: DPCProfilingThresholdReached

Description

Thread DpcSequenceNumber on CPU ThresholdTicks exceeded the threshold of CumulativeTickCount ticks running at DISPATCH_LEVEL or higher, profiling started with sequence number SingleTickCount.

Message #

Thread %1 on CPU %2 exceeded the threshold of %4 ticks running at DISPATCH_LEVEL or higher, profiling started with sequence number %3.

Fields #

Name	Description
`DpcSequenceNumber` UInt32
`ThresholdTicks` UInt32
`SingleTickCount` UInt32
`CumulativeTickCount` UInt32
`Cause` UInt32

Event ID 4: Capture DPC sequence number DpcSequenceNumber at tick Tick.

Provider: Microsoft-Windows-Kernel-CPU-Starvation
Channel: Operational
Task: DPCProfiling
Opcode: DPCProfilingStackCapture

Description

Capture DPC sequence number DpcSequenceNumber at tick Tick.

Message #

Capture DPC sequence number %1 at tick %2.

Fields #

Name	Description
`DpcSequenceNumber` UInt32
`Tick` UInt32

Provenance

Where this provider's schema came from, and which Windows build it was observed on. Windows can change a provider's event schema between builds, so use this to judge whether it matches the build you collect from.

ETW provider GUID 7f54ca8a-6c72-5cbc-b96f-d0ef905b8bce

Defined in Microsoft-Windows-System-Events.dll, which carries the event manifest.

Observed on:

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.3932, captured 2026-06-02
Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.5074, captured 2026-06-02

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`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
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`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)

Microsoft-Windows-Kernel-CPU-Starvation

Event ID 1: CPU CpuNumber exceeded its single DPC soft timeout of SoftTimeoutTicks clock ticks.

Description

Message #

Fields #

Event ID 2: CPU CpuNumber exceeded its cumulative DPC soft timeout of CumulativeSoftTimeoutTicks clock ticks, by running at an IRQL greater than or equal to DISPATCH_LEVEL for CumulativeTickCount clock ticks...

Description

Message #

Fields #

Event ID 3: Thread DpcSequenceNumber on CPU ThresholdTicks exceeded the threshold of CumulativeTickCount ticks running at DISPATCH_LEVEL or higher, profiling started with sequence number SingleTickCount.

Description

Message #

Fields #

Event ID 4: Capture DPC sequence number DpcSequenceNumber at tick Tick.

Description

Message #

Fields #

Provenance

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