org.eclipse.test.performance
Interface Dimension

All Known Implementing Classes:

Dim

public interface Dimension

Some predefined dimensions most likely supported on all platforms. This interface is not intended to be implemented by clients.

Since:

3.1

Field Summary

static Dimension	COMITTED The total amount of committed memory (for the entire machine).
static Dimension	CPU_TIME The amount of CPU time used so far by this process.
static Dimension	ELAPSED_PROCESS The total elapsed time this process has been running.
static Dimension	KERNEL_TIME The amount of time that the process has executed in kernel mode.
static Dimension	USED_JAVA_HEAP The amount of memory used in the JVM.
static Dimension	WORKING_SET WORKING_SET is the amount of memory in the working set of this process.
static Dimension	WORKING_SET_PEAK WORKING_SET_PEAK is the maximum amount of memory in the working set of this process at any point in time.

Field Detail

KERNEL_TIME

static final Dimension KERNEL_TIME

The amount of time that the process has executed in kernel mode. It is calculated by taking the sum of the time that each of the threads of the process has executed in kernel mode.

CPU_TIME

static final Dimension CPU_TIME

The amount of CPU time used so far by this process. It is calculated by adding the KERNEL_TIME and the amount of time that the process has executed in user mode. The user time is calculated by taking the sum of the time that each of the threads of the process has executed in user mode. It does not include any time where the process is waiting for OS resources. It is the best approximation for ELAPSED_PROCESS (which is not available on all platforms).

WORKING_SET

static final Dimension WORKING_SET

WORKING_SET is the amount of memory in the working set of this process. The working set is the set of memory pages touched recently by the threads in the process. If free memory in the computer is above a threshold, pages are left in the working set of a process even if they are not in use. When free memory falls below a threshold, pages are removed from working sets.

ELAPSED_PROCESS

static final Dimension ELAPSED_PROCESS

The total elapsed time this process has been running. Since it starts at 0 on process start it can be used to measure startup time. On Windows it is calculated by subtracting the creation time of the process from the current system time. On Linux it is calculated by subtracting the value of the system property "eclipse.startTime" from System.currentTimeMillis() Please note that in contrast to the CPU_TIME the elapsed time of a process is influenced by other processes running in parallel.

USED_JAVA_HEAP

static final Dimension USED_JAVA_HEAP

The amount of memory used in the JVM. It is calculated by subtracting Runtime.freeMemory() from Runtime.totalMemory().

WORKING_SET_PEAK

static final Dimension WORKING_SET_PEAK

WORKING_SET_PEAK is the maximum amount of memory in the working set of this process at any point in time. The working set is the set of memory pages touched recently by the threads in the process. If free memory in the computer is above a threshold, pages are left in the working set of a process even if they are not in use. When free memory falls below a threshold, pages are removed from working sets. Currently this dimension is only available on Windows.

COMITTED

static final Dimension COMITTED

The total amount of committed memory (for the entire machine). Committed memory is the size of virtual memory that has been committed (as opposed to simply reserved). Committed memory must have backing (i.e., disk) storage available, or must be assured never to need disk storage (because main memory is large enough to hold it.) Notice that this is an instantaneous count, not an average over the time interval. Currently this dimension is only available on Windows.