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JOBOBJECT_LIMIT_VIOLATION_INFORMATION structure (winnt.h)

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Contains information about resource notification limits that have been exceeded for a job object. This structure is used with the QueryInformationJobObject function with the JobObjectLimitViolationInformation information class.

Syntax

typedef struct _JOBOBJECT_LIMIT_VIOLATION_INFORMATION {
  DWORD                            LimitFlags;
  DWORD                            ViolationLimitFlags;
  DWORD64                          IoReadBytes;
  DWORD64                          IoReadBytesLimit;
  DWORD64                          IoWriteBytes;
  DWORD64                          IoWriteBytesLimit;
  LARGE_INTEGER                    PerJobUserTime;
  LARGE_INTEGER                    PerJobUserTimeLimit;
  DWORD64                          JobMemory;
  DWORD64                          JobMemoryLimit;
  JOBOBJECT_RATE_CONTROL_TOLERANCE RateControlTolerance;
  JOBOBJECT_RATE_CONTROL_TOLERANCE RateControlToleranceLimit;
} JOBOBJECT_LIMIT_VIOLATION_INFORMATION, *PJOBOBJECT_LIMIT_VIOLATION_INFORMATION;

Members

LimitFlags

Flags that identify the notification limits in effect for the job. This member is a bitfield that determines whether other structure members are used. This member can be any combination of the following values.

Value Meaning
JOB_OBJECT_LIMIT_JOB_MEMORY
0x00000200
 The job has a committed memory notification limit. The JobMemoryLimit member contains more information.
JOB_OBJECT_LIMIT_JOB_READ_BYTES
0x00010000
 The job has an I/O read bytes notification limit. The IoReadBytesLimit member contains more information.
JOB_OBJECT_LIMIT_JOB_TIME
0x00000004
 The job has a user-mode execution time notification limit. The PerJobUserTimeLimit member contains more information.
JOB_OBJECT_LIMIT_JOB_WRITE_BYTES
0x00020000
 The job has an I/O write bytes notification limit. The IoWriteBytesLimit member contains more information.
JOB_OBJECT_LIMIT_RATE_CONTROL
0x00040000
 The extent to which a job can exceed its CPU rate control limit. The RateControlToleranceLimit member contains more information.

ViolationLimitFlags

Flags that identify the notification limits that have been exceeded. This member is a bitfield that determines whether other structure members are used. This member can be any combination of the following values.

Value Meaning
JOB_OBJECT_LIMIT_READ_BYTES
0x00010000
 The job's I/O read bytes notification limit has been exceeded. The IoReadBytes member contains more information.
JOB_OBJECT_LIMIT_WRITE_BYTES
0x00020000
 The job's I/O write bytes notification limit has been exceeded. The IoWriteBytes member contains more information.
JOB_OBJECT_LIMIT_JOB_TIME
0x00000004
 The job's user-mode execution time notification limit has been exceeded. The PerJobUserTime member contains more information.
JOB_OBJECT_LIMIT_JOB_MEMORY
0x00000200
 The job's committed memory notification limit has been exceeded. The JobMemory member contains more information.
JOB_OBJECT_LIMIT_RATE_CONTROL
0x00040000
 The job's CPU rate control limit has been exceeded. The RateControlTolerance member contains more information.

IoReadBytes

If the ViolationLimitFlags member specifies JOB_OBJECT_LIMIT_READ_BYTES, this member contains the total I/O read bytes for all processes in the job at the time the notification was sent.

IoReadBytesLimit

If the LimitFlags member specifies JOB_OBJECT_LIMIT_READ_BYTES, this member contains the I/O read bytes notification limit in effect for the job.

IoWriteBytes

If the ViolationLimitFlags member specifies JOB_OBJECT_LIMIT_WRITE_BYTES, this member contains the total I/O write bytes for all processes in the job at the time the notification was sent.

IoWriteBytesLimit

If the LimitFlags member specifies JOB_OBJECT_LIMIT_WRITE_BYTES, this member contains the I/O write bytes notification limit in effect for the job.

PerJobUserTime

If the ViolationLimitFlags member specifies JOB_OBJECT_LIMIT_JOB_TIME, this member contains the total user-mode execution time for all processes in the job at the time the notification was sent.

PerJobUserTimeLimit

If the LimitFlags member specifies JOB_OBJECT_LIMIT_JOB_TIME, this member contains the user-mode execution notification limit in effect for the job.

JobMemory

If the ViolationLimitFlags member specifies JOB_OBJECT_LIMIT_JOB_MEMORY, this member contains the committed memory for all processes in the job at the time the notification was sent.

JobMemoryLimit

If the LimitFlags member specifies JOB_OBJECT_LIMIT_JOB_MEMORY, this member contains the committed memory limit in effect for the job.

RateControlTolerance

If the LimitFlags parameter specifies JOB_OBJECT_LIMIT_RATE_CONTROL, this member specifies the extent to which the job exceeded its CPU rate control limits at the time the notification was sent. This member can be one of the following values.

Value Meaning
ToleranceLow
1
 The job exceeded its CPU rate control limits for 20% of the tolerance interval.
ToleranceMedium
2
 The job exceeded its CPU rate control limits for 40% of the tolerance interval.
ToleranceHigh
3
 The job exceeded its CPU rate control limits for 60% of the tolerance interval.

RateControlToleranceLimit

If the LimitFlags parameter specifies JOB_OBJECT_LIMIT_RATE_CONTROL, this member contains the CPU rate control notification limits specified for the job.

Value Meaning
ToleranceIntervalShort
1
 The tolerance interval is 10 seconds.
ToleranceIntervalMedium
2
 The tolerance interval is one minute.
ToleranceIntervalLong
3
 The tolerance interval is 10 minutes.

Remarks

When any notification limit specified in a JOBOBJECT_NOTIFICATION_LIMIT_INFORMATION structure is exceeded, the system sends a JOB_OBJECT_MSG_NOTIFICATION_LIMIT message to the I/O completion port associated with the job.

To retrieve information about the limits that were exceeded, the application monitoring the I/O completion port must call the QueryInformationJobObject function with the JobObjectLimitViolationInformation information class and a pointer to a JOBOBJECT_LIMIT_VIOLATION_INFORMATION structure.

Requirements

Requirement Value
Minimum supported client Windows 8 [desktop apps only]
Minimum supported server Windows Server 2012 [desktop apps only]
Header winnt.h

See also

QueryInformationJobObject

SetInformationJobObject