Accurate generation of multiple dimensions of computer load

An apparatus configured to adjustably generate multiple dimensions of a computer resource load to adjustably test availability of multiple dimensions of computer resource load, comprising:

• a first computer that includes a processor, memory, and instructions in the memory that implement:
• executing, on a first computer, a utilization test that generates the multiple dimensions of a resource load on the first computer, the multiple dimensions including at least two of:
• a processor utilization dimension, a main memory utilization dimension, a mass storage utilization dimension, and a network utilization dimension,
• wherein, for each dimension of two or more of the multiple dimensions, the utilization test performs iterations of generating a load in said each dimension of the resource load on the first computer, to cause an actual utilization based on a target utilization of said each dimension on the first computer,
• generating a load for a particular one of the multiple dimensions on the first computer;
• measuring the actual utilization of the particular one of the multiple dimensions during generation of the resource load on the first computer, the actual utilization being a result of at least:
• the generated load;
• and
• a first utilization contribution to the particular one of the multiple dimensions on the first computer, wherein the first utilization contribution is generated outside the utilization test and on the first computer, and
• adjusting the generated load to attempt to realize the target utilization on the first computer for said particular one of the multiple dimensions by correcting for an inequality between (i) the actual utilization, and (ii) the target utilization.

An apparatus configured to adjustably generate multiple dimensions of a computer resource load to test the multiple dimensions of the computer resource load, comprising:

• a first computer that includes a processor, memory, and instructions in the memory that implement:
• executing, on a first computer, a utilization test that generates the multiple dimensions of a resource load on the first computer, the multiple dimensions including at least two of:
• a processor utilization dimension, a main memory utilization dimension, a mass storage utilization dimension, and a network utilization dimension,
• wherein, for each dimension of two or more of the multiple dimensions, the utilization test performs, with a proportional plus integral plus derivative (PID) controller, iterations of generating a load in said each dimension of the resource load on the first computer, to cause an actual utilization based on a target utilization of said each dimension on the first computer while continuously adjusting the generated load to compensate for a first utilization contribution that is generated outside the utilization test and on the first computer.

A non-transitory computer-readable medium storing code for adjustably generating multiple dimensions of a computer resource load to test the multiple dimensions of the computer resource load, the code comprising:

• instructions for executing, on a first computer, a utilization test that generates the multiple dimensions of a resource load on the first computer, the multiple dimensions including at least two of:
• a processor utilization dimension, a main memory utilization dimension, a mass storage utilization dimension, and a network utilization dimension,
• wherein, for each dimension of two or more of the multiple dimensions, the utilization test performs iterations of generating a load in said each dimension of the resource load on the first computer, to cause an actual utilization based on a target utilization of said each dimension on the first computer,
• wherein the utilization test generates a load for a particular one of the multiple dimensions on the first computer;
• wherein the utilization test measures the actual utilization of the particular one of the multiple dimensions during generation of the resource load on the first computer, the actual utilization being result of at least:
• the generated load;
• and
• a first utilization contribution to the particular one of the multiple dimensions on the first computer, wherein the first utilization contribution is generated outside the utilization test and on the first computer, and
• wherein the utilization test adjusts the generated load to attempt to realize the target utilization on the first computer for said particular one of the multiple dimensions by correcting for an inequality between (i) the actual utilization and (ii) the target utilization.