Abstract: A processor may aggregate cache misses in a cache, the cache shared by a plurality of input/output (I/O) sources. The processor may aggregate cache occupancy in the cache by the plurality of VO sources. The processor may and identify, based on the aggregating, a first I/O source of the plurality of I/O sources as impacting the cache.

Abstract: Methods, systems, and computer readable media for deploying a virtual machine (VM) are disclosed. According to one exemplary method, the method includes receiving a request for creating a VM. The method also includes creating the VM using a VM operating system (OS) stored in a read-only memory, wherein the read-only memory is shared among a plurality of VMs.

Abstract: There is disclosed a system and method for high precision packet generation in software using a hardware time stamp counter. The method may include receiving user selection to create a network test and receiving test information from the user, the test information including a packet transmission rate. A packet transmission interval may be calculated based on the packet transmission rate. The network test is executed. Packets are transmitted at the packet transmission rate, including checking a hardware counter to learn if the packet transmission interval has elapsed and, when the packet transmission interval has elapsed, sending the packet over a network. The method may be performed by a network testing system or computing device.

Abstract: Methods, systems, and computer readable media for deploying a virtual machine (VM) are disclosed. According to one exemplary method, the method includes receiving a request for creating a VM. The method also includes creating the VM using a VM operating system (OS) stored in a read-only memory, wherein the read-only memory is shared among a plurality of VMs.

Abstract: A system and method for locating signatures in packets is disclosed. The method may include receiving a packet over the network and searching the packet for a signature at locations specified in a location cache. When the signature is found at a stored location specified in the location cache, pertinent data located after the signature is obtained and network testing processing is performed. When the signature is not found at any stored location specified in the location cache, the packet is searched for the signature. When the signature is found, the location at which the signature is found is added to the location cache. Pertinent data located after the signature is obtained and network testing processing is performed. The method may be performed by a network testing system and by a computing device having a virtual machine.

Abstract: Redirecting a function included in an operating system is disclosed. The redirecting is achieved by identifying an original function call in a kernel and replacing the function call with a replacement function call so that the replacement function is called in place of the original function. In this way the original function call is bypassed and the original call is redirected to the replacement function. This may be done to augment or replace the original function. In one embodiment, when a packet is received, a replacement receiving function is called in place of the network receiving function that was provided with the kernel. In this way, different, less or additional processing of received packets may be performed.

Abstract: Redirecting a function included in an operating system is disclosed. The redirecting is achieved by identifying an original function call in a kernel and replacing the function call with a replacement function call so that the replacement function is called in place of the original function. In this way the original function call is bypassed and the original call is redirected to the replacement function. This may be done to augment or replace the original function. In one embodiment, when a packet is received, a replacement receiving function is called in place of the network receiving function that was provided with the kernel. In this way, different, less or additional processing of received packets may be performed.

Abstract: There is disclosed a system and method for high precision packet generation in software using a hardware time stamp counter. The method may include receiving user selection to create a network test and receiving test information from the user, the test information including a packet transmission rate. A packet transmission interval may be calculated based on the packet transmission rate. The network test is executed. Packets are transmitted at the packet transmission rate, including checking a hardware counter to learn if the packet transmission interval has elapsed and, when the packet transmission interval has elapsed, sending the packet over a network. The method may be performed by a network testing system or computing device.

Abstract: A system and method for locating signatures in packets is disclosed. The method may include receiving a packet over the network and searching the packet for a signature at locations specified in a location cache. When the signature is found at a stored location specified in the location cache, pertinent data located after the signature is obtained and network testing processing is performed. When the signature is not found at any stored location specified in the location cache, the packet is searched for the signature. When the signature is found, the location at which the signature is found is added to the location cache. Pertinent data located after the signature is obtained and network testing processing is performed. The method may be performed by a network testing system and by a computing device having a virtual machine.

Abstract: Measuring delay in a network segment and/or through a network device is disclosed. A method includes a sender preparing a real-time transport protocol with a transmit timestamp based on the time received from a remote, well-known time server, and a receiver computing a one way delay based on a receive time obtained from a remote, well-known time server and the transmit timestamp. A method in a single system includes a sender preparing a real-time transport protocol with a transmit timestamp based on the system, and a receiver computing a one way delay based on a receive time obtained from the system and the transmit timestamp. The method may be performed on one or more network cards and in one or more network testing systems, and may be implemented by one or more computing devices.