Microsoft-Windows-QoS-Pacer

16 events across 1 channel

Event	Title	Channel	Sample
1	Create FlowType at SendSpec.TokenRate bytes/sec with status Status.	Diagnostic	N
2	Update FlowType from SendSpec.TokenRate to DsClass with status Status.	Diagnostic	N
3	Start Pacer on NetLuid=NetLuid (FriendlyNameLen).	Diagnostic	N
4	Stop Pacer on NetLuid=NetLuid (FriendlyNameLen).	Diagnostic	N
5	Update FlowType from OldSendSpec.TokenRate to NewSendSpec.TokenRate.	Diagnostic	N
6	PACER: Flow deleted (dropped=DroppedPackets, …	Diagnostic	N
7	PACER: Packet dropped, reason=DropReason.	Diagnostic	N
8	PACER: Non-conformance marking, dscp=DsClass, 802.	Diagnostic	N
9	PACER: Application-based DSCP marking policy state=Allow.	Diagnostic	N
10	PACER: Packet rescheduled (eligible={IneligibleCount}/{TotalCount}; …	Diagnostic	N
11	PACER: CurrentTime= CurrentTime BytesSent= BytesSent BytesDropped= BytesDropped …	Diagnostic	N
12	PACER: NetLuid= NetLuid CurrentTime= CurrentTime ActiveFlows= ActiveFlows …	Diagnostic	N
13	PACER: FlowConformanceEventId= FlowConformanceEvent CurrentTime= CurrentTime …	Diagnostic	N
14	PACER: FlowSendQueueEventId= FlowSendQueueEvent CurrentTime= CurrentTime …	Diagnostic	N
15	PACER: TimerId= TimerEvent EventId= TimerId CurrentTime= CurrentTime SetTime= …	Diagnostic	N
16	PACER: NetLuid= NetLuid CurrentTime= CurrentTime BytesRequested= BytesRequested …	Diagnostic	N

Event ID 1: Create FlowType at SendSpec.TokenRate bytes/sec with status Status.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Start

Description

Create FlowType at SendSpec.TokenRate bytes/sec with status Status.

Message #

Create %2 at %3 bytes/sec with status %1

Fields #

Name	Description
`Status` UInt32	NTSTATUS reference
`FlowType` UInt32
`SendSpecTokenRate` UInt32
`SendSpecTokenBucketSize` UInt32
`SendSpecPeakBandwidth` UInt32
`SendSpecLatency` UInt32
`SendSpecDelayVariation` UInt32
`SendSpecServiceType` UInt32
`SendSpecMaxSduSize` UInt32
`SendSpecMinimumPolicedSize` UInt32
`DsClass` Int16
`TrafficClass` Int16
`QoSObjectBufferLen` UInt32
`QoSObjectBuffer` Binary
`DefaultSystemFlow` UInt8

Event ID 2: Update FlowType from SendSpec.TokenRate to DsClass with status Status.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

Update FlowType from SendSpec.TokenRate to DsClass with status Status.

Message #

Update %2 from %3 to %11 with status %1

Fields #

Name	Description
`Status` UInt32	NTSTATUS reference
`FlowType` UInt32
`SendSpecTokenRate` UInt32
`SendSpecTokenBucketSize` UInt32
`SendSpecPeakBandwidth` UInt32
`SendSpecLatency` UInt32
`SendSpecDelayVariation` UInt32
`SendSpecServiceType` UInt32
`SendSpecMaxSduSize` UInt32
`SendSpecMinimumPolicedSize` UInt32
`DsClass` Int16
`TrafficClass` Int16
`NewQoSObjectBufferLen` UInt32
`NewQoSObjectBuffer` Binary
`AffectedPackets` UInt32

Event ID 3: Start Pacer on NetLuid=NetLuid (FriendlyNameLen).

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

Start Pacer on NetLuid=NetLuid (FriendlyNameLen).

Message #

Start Pacer on NetLuid=%1 (%3)

Fields #

Name	Description
`NetLuid` UInt64
`NdisMediumType` UInt32
`FriendlyNameLen` UInt32
`FriendlyName` UnicodeString
`DeviceNameLen` UInt32
`DeviceName` UnicodeString
`Context` UInt32

Event ID 4: Stop Pacer on NetLuid=NetLuid (FriendlyNameLen).

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

Stop Pacer on NetLuid=NetLuid (FriendlyNameLen).

Message #

Stop Pacer on NetLuid=%1 (%3)

Fields #

Name	Description
`NetLuid` UInt64
`NdisMediumType` UInt32
`FriendlyNameLen` UInt32
`FriendlyName` UnicodeString
`DeviceNameLen` UInt32
`DeviceName` UnicodeString
`Context` UInt32

Event ID 5: Update FlowType from OldSendSpec.TokenRate to NewSendSpec.TokenRate.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

Update FlowType from OldSendSpec.TokenRate to NewSendSpec.TokenRate.

Message #

Update %1 from %2 to %10

Fields #

Name	Description
`FlowType` UInt32
`OldSendSpecTokenRate` UInt32
`OldSendSpecTokenBucketSize` UInt32
`OldSendSpecPeakBandwidth` UInt32
`OldSendSpecLatency` UInt32
`OldSendSpecDelayVariation` UInt32
`OldSendSpecServiceType` UInt32
`OldSendSpecMaxSduSize` UInt32
`OldSendSpecMinimumPolicedSize` UInt32
`NewSendSpecTokenRate` UInt32
`NewSendSpecTokenBucketSize` UInt32
`NewSendSpecPeakBandwidth` UInt32
`NewSendSpecLatency` UInt32
`NewSendSpecDelayVariation` UInt32
`NewSendSpecServiceType` UInt32
`NewSendSpecMaxSduSize` UInt32
`NewSendSpecMinimumPolicedSize` UInt32
`NewQoSObjectBufferLen` UInt32
`NewQoSObjectBuffer` Binary
`AffectedPackets` UInt32

Event ID 6: PACER: Flow deleted (dropped=DroppedPackets, scheduled=PacketsScheduled/BytesScheduled, transmitted=PacketsTransmitted/BytesTransmitted, nbl=NblComplete/NblSent).

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Stop

Description

PACER: Flow deleted (dropped=DroppedPackets, scheduled=PacketsScheduled/BytesScheduled, transmitted=PacketsTransmitted/BytesTransmitted, nbl=NblComplete/NblSent).

Message #

PACER: Flow deleted (dropped=%1, scheduled=%2/%4, transmitted=%3/%5, nbl=%7/%6)

Fields #

Name	Description
`DroppedPackets` UInt32
`PacketsScheduled` UInt32
`PacketsTransmitted` UInt32
`BytesScheduled` UInt64
`BytesTransmitted` UInt64
`NblSent` UInt32
`NblComplete` UInt32

Event ID 7: PACER: Packet dropped, reason=DropReason.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: Packet dropped, reason=DropReason.

Message #

PACER: Packet dropped, reason=%1

Fields #

Name	Description
`DropReason` UInt32

Event ID 8: PACER: Non-conformance marking, dscp=DsClass, 802.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: Non-conformance marking, dscp=DsClass, 802.1p=TrafficClass, WMM=Wmm.

Message #

PACER: Non-conformance marking, dscp=%1, 802.1p=%2, WMM=%3

Fields #

Name	Description
`DsClass` Int16
`TrafficClass` Int16
`Wmm` Int16

Event ID 9: PACER: Application-based DSCP marking policy state=Allow.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: Application-based DSCP marking policy state=Allow.

Message #

PACER: Application-based DSCP marking policy state=%1

Fields #

Name	Description
`Allow` UInt32

Event ID 10: PACER: Packet rescheduled (eligible={IneligibleCount}/{TotalCount}; first-delta={IneligibleFirstDelta}; last-delta={IneligibleLastDelta}).

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic

Description

PACER: Packet rescheduled (eligible={IneligibleCount}/{TotalCount}; first-delta={IneligibleFirstDelta}; last-delta={IneligibleLastDelta}).

Message #

PACER: Packet rescheduled (eligible={IneligibleCount}/{TotalCount}; first-delta={IneligibleFirstDelta}; last-delta={IneligibleLastDelta})

Fields #

Name	Description
`IneligibleCount`
`TotalCount`
`IneligibleFirstDelta`
`IneligibleLastDelta`

Event ID 11: PACER: CurrentTime= CurrentTime BytesSent= BytesSent BytesDropped= BytesDropped NewSendWindow= NewSendWindow MinSendWindow= MinSendWindow.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: CurrentTime= CurrentTime BytesSent= BytesSent BytesDropped= BytesDropped NewSendWindow= NewSendWindow MinSendWindow= MinSendWindow.

Message #

PACER: CurrentTime= %1 BytesSent= %2 BytesDropped= %3 NewSendWindow= %4 MinSendWindow= %5

Fields #

Name	Description
`CurrentTime` UInt64
`BytesSent` UInt32
`BytesDropped` UInt32
`NewSendWindow` UInt32
`MinSendWindow` UInt32
`Weight` UInt32
`SBytesRequested` Int64
`DropRate` UInt32
`IdleIntervals` UInt64
`RcSendWindow` UInt32
`RcEpisodeLength` UInt32
`RcStatMuxFactor` UInt32
`RcExitThreshold` UInt32
`AverageMaxBytesRequested` UInt32

Event ID 12: PACER: NetLuid= NetLuid CurrentTime= CurrentTime ActiveFlows= ActiveFlows ActiveWeight= ActiveWeight NewSendWindow= NewSendWindow.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: NetLuid= NetLuid CurrentTime= CurrentTime ActiveFlows= ActiveFlows ActiveWeight= ActiveWeight NewSendWindow= NewSendWindow.

Message #

PACER: NetLuid= %1 CurrentTime= %2 ActiveFlows= %3 ActiveWeight= %4 NewSendWindow= %5

Fields #

Name	Description
`NetLuid` Binary
`CurrentTime` UInt64
`ActiveFlows` UInt32
`ActiveWeight` UInt32
`NewSendWindow` UInt32

Event ID 13: PACER: FlowConformanceEventId= FlowConformanceEvent CurrentTime= CurrentTime LastConformanceTime= LastConformanceTime PeakConformanceTime= PeakConformanceTime Tokens= Tokens MaxTokens= MaxTokens Ra...

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: FlowConformanceEventId= FlowConformanceEvent CurrentTime= CurrentTime LastConformanceTime= LastConformanceTime PeakConformanceTime= PeakConformanceTime Tokens= Tokens MaxTokens= MaxTokens Rate= Rate LastConformanceCredits= LastConformanceCredits.

Message #

PACER: FlowConformanceEventId= %1 CurrentTime= %2 LastConformanceTime= %3 PeakConformanceTime= %4 Tokens= %5 MaxTokens= %6 Rate= %7 LastConformanceCredits= %8

Fields #

Name	Description
`FlowConformanceEvent` UInt32
`CurrentTime` UInt64
`LastConformanceTime` UInt64
`PeakConformanceTime` UInt64
`Tokens` UInt64
`MaxTokens` UInt64
`Rate` UInt64
`LastConformanceCredits` UInt32

Event ID 14: PACER: FlowSendQueueEventId= FlowSendQueueEvent CurrentTime= CurrentTime IdleTime= IdleTime DelayTime= DelayTime BytesRequested= BytesRequested BytesSent= BytesSent BytesQueued= BytesQueued.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: FlowSendQueueEventId= FlowSendQueueEvent CurrentTime= CurrentTime IdleTime= IdleTime DelayTime= DelayTime BytesRequested= BytesRequested BytesSent= BytesSent BytesQueued= BytesQueued.

Message #

PACER: FlowSendQueueEventId= %1 CurrentTime= %2 IdleTime= %3 DelayTime= %4 BytesRequested= %5 BytesSent= %6 BytesQueued= %7

Fields #

Name	Description
`FlowSendQueueEvent` UInt32
`CurrentTime` UInt64
`IdleTime` UInt64
`DelayTime` UInt64
`BytesRequested` UInt32
`BytesSent` UInt32
`BytesQueued` UInt32

Event ID 15: PACER: TimerId= TimerEvent EventId= TimerId CurrentTime= CurrentTime SetTime= SetTime RunTime= RunTime FlowsProcessed= FlowsProcessed NblsSent= NblsSent NblsDropped= NblsDropped Flags= Flags.

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: TimerId= TimerEvent EventId= TimerId CurrentTime= CurrentTime SetTime= SetTime RunTime= RunTime FlowsProcessed= FlowsProcessed NblsSent= NblsSent NblsDropped= NblsDropped Flags= Flags.

Message #

PACER: TimerId= %1 EventId= %2 CurrentTime= %3 SetTime= %4 RunTime= %5 FlowsProcessed= %6 NblsSent= %7 NblsDropped= %8 Flags= %9

Fields #

Name	Description
`TimerEvent` UInt32
`TimerId` UInt32
`CurrentTime` UInt64
`SetTime` UInt64
`RunTime` UInt64
`FlowsProcessed` UInt32
`NblsSent` UInt32
`NblsDropped` UInt32
`Flags` UInt32

Event ID 16: PACER: NetLuid= NetLuid CurrentTime= CurrentTime BytesRequested= BytesRequested BytesCompleted= BytesCompleted BytesInQueue= BytesInQueue BufferAvailable= BufferAvailable AlphaTerm= AlphaTerm BetaT...

Provider: Microsoft-Windows-QoS-Pacer
Channel: Diagnostic
Opcode: Info

Description

PACER: NetLuid= NetLuid CurrentTime= CurrentTime BytesRequested= BytesRequested BytesCompleted= BytesCompleted BytesInQueue= BytesInQueue BufferAvailable= BufferAvailable AlphaTerm= AlphaTerm BetaTerm= BetaTerm DeltaSendWindow= DeltaSendWindow NewSendWindow= NewSendWindow.

Message #

PACER: NetLuid= %1 CurrentTime= %2 BytesRequested= %3 BytesCompleted= %4 BytesInQueue= %5 BufferAvailable= %6 AlphaTerm= %8 BetaTerm= %7 DeltaSendWindow= %9 NewSendWindow= %10

Fields #

Name	Description
`NetLuid` Binary
`CurrentTime` UInt64
`BytesRequested` UInt32
`BytesCompleted` UInt32
`BytesInQueue` UInt32
`BufferAvailable` Int64
`BetaTerm` Int64
`AlphaTerm` Int64
`DeltaSendWindow` Int64
`NewSendWindow` Int64

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 914ed502-b70d-4add-b758-95692854f8a3

Defined in pacer.sys, the binary that emits these events.

Observed on:

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.1, captured 2026-06-02
Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.1, captured 2026-06-02

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`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-QoS-Pacer

Event ID 1: Create FlowType at SendSpec.TokenRate bytes/sec with status Status.

Description

Message #

Fields #

Event ID 2: Update FlowType from SendSpec.TokenRate to DsClass with status Status.

Description

Message #

Fields #

Event ID 3: Start Pacer on NetLuid=NetLuid (FriendlyNameLen).

Description

Message #

Fields #

Event ID 4: Stop Pacer on NetLuid=NetLuid (FriendlyNameLen).

Description

Message #

Fields #

Event ID 5: Update FlowType from OldSendSpec.TokenRate to NewSendSpec.TokenRate.

Description

Message #

Fields #

Event ID 6: PACER: Flow deleted (dropped=DroppedPackets, scheduled=PacketsScheduled/BytesScheduled, transmitted=PacketsTransmitted/BytesTransmitted, nbl=NblComplete/NblSent).

Description

Message #

Fields #

Event ID 7: PACER: Packet dropped, reason=DropReason.

Description

Message #

Fields #

Event ID 8: PACER: Non-conformance marking, dscp=DsClass, 802.

Description

Message #

Fields #

Event ID 9: PACER: Application-based DSCP marking policy state=Allow.

Description

Message #

Fields #

Event ID 10: PACER: Packet rescheduled (eligible={IneligibleCount}/{TotalCount}; first-delta={IneligibleFirstDelta}; last-delta={IneligibleLastDelta}).

Description

Message #

Fields #

Event ID 11: PACER: CurrentTime= CurrentTime BytesSent= BytesSent BytesDropped= BytesDropped NewSendWindow= NewSendWindow MinSendWindow= MinSendWindow.

Description

Message #

Fields #

Event ID 12: PACER: NetLuid= NetLuid CurrentTime= CurrentTime ActiveFlows= ActiveFlows ActiveWeight= ActiveWeight NewSendWindow= NewSendWindow.

Description

Message #

Fields #

Event ID 13: PACER: FlowConformanceEventId= FlowConformanceEvent CurrentTime= CurrentTime LastConformanceTime= LastConformanceTime PeakConformanceTime= PeakConformanceTime Tokens= Tokens MaxTokens= MaxTokens Ra...

Description

Message #

Fields #

Event ID 14: PACER: FlowSendQueueEventId= FlowSendQueueEvent CurrentTime= CurrentTime IdleTime= IdleTime DelayTime= DelayTime BytesRequested= BytesRequested BytesSent= BytesSent BytesQueued= BytesQueued.

Description

Message #

Fields #

Event ID 15: PACER: TimerId= TimerEvent EventId= TimerId CurrentTime= CurrentTime SetTime= SetTime RunTime= RunTime FlowsProcessed= FlowsProcessed NblsSent= NblsSent NblsDropped= NblsDropped Flags= Flags.

Description

Message #

Fields #

Event ID 16: PACER: NetLuid= NetLuid CurrentTime= CurrentTime BytesRequested= BytesRequested BytesCompleted= BytesCompleted BytesInQueue= BytesInQueue BufferAvailable= BufferAvailable AlphaTerm= AlphaTerm BetaT...

Description

Message #

Fields #

Provenance

Downloads