Hewlett-Packard Development Company, L.p.

Aravind Menon

Yoshio Frank Turner

Gopalakrishnan Janakiraman

Jose Renato Santos

An embodiment of monitoring resource usage in a computing environment begins with a first client registering a session with a monitoring entity. The session comprises an event type, a count, a start condition, an end condition, and a sample type. Next, a second client registers with the session. Upon occurrence of the start condition and until occurrence of the end condition or until interrupted, the monitoring entity iteratively initiates a counting of occurrences of the event type that continues until reaching the count and saves a sample according to the sample type upon reaching the count. The resource monitoring entity provides at least a portion of a plurality of samples to the first client.

Method of monitoring resource usage in computing environment

According to an embodiment, a method of sampling hardware events in a computer system comprises a first step and iterative performance of second and third steps. In the first step, an initiator virtual machine identifies a profiling event and a count to a virtual machine monitor. The virtual machine monitor iteratively performs the second and third steps. In the second step, the virtual machine monitor programs a hardware event counter with the count for the profiling event. In the third step, upon receiving an interrupt from the hardware event counter, the virtual machine monitor saves a sample that comprises a code-in-execution identifier.

Method of sampling hardware events in computer system

An embodiment of a method of virtualizing a counter in a computer system comprises a first step and iterative performance of second through fifth steps. In the first step, a virtual machine monitor programs a hardware event counter with an initial count for a profiling event for a virtual machine. In the second step, the virtual machine monitor saves a suspension count and disables the hardware event counter upon suspending operation of the virtual machine. In the third step, the virtual machine monitor programs the hardware event counter with the suspension count upon resuming the operation of the virtual machine. Upon receiving an interrupt from the hardware event counter that provides notification of reaching the initial count, the virtual machine monitor performs the fourth and fifth steps. In the fourth step, the virtual machine monitor saves a sample that comprises an event identifier and a code-in-execution indicator. In the fifth step, the virtual machine monitor reprograms the hardware event counter with the initial count.

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Lausanne, Switzerland

Aravind Menon