Performance implications of hosting enterprise telephony applications on virtualized multi-core platforms

Patnaik, Devdutt; Krishnakumar, A. S.; Krishnan, P.; Singh, Navjot; Yajnik, S.

doi:10.1145/1595637.1595648

Cited by 14 publications

(11 citation statements)

References 16 publications

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“…This is largely discussed in [16], xen hypervisor evaluation for hosting IP telephony application, and best practices from the xen community. In our framework, we establish a one-to-one mapping of a virtual machine to a core; therefore, employing multiple vCPUs per virtual machine does not maximize utilization of CPU or I/O throughput of the system.…”

Section: Qos For Cpumentioning

confidence: 99%

Evaluating industrial applicability of virtualization on a distributed multicore platform

Mahmud

Sandström

Vulgarakis

2014

Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA)

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Adoption of virtualization technology has been limited in industrial automation due to unavailability of mature solutions, and strict timing requirements of control systems. However, current advancement in Virtual Monitoring Machine, multicore technology, virtualization extension and network virtualization has led to increased interest of virtualization in industrial automation.So far, many related research are focused on maximizing CPU and I/O utilization, and optimization applicable to soft realtime systems (i.e., outside industrial automation domain), e.g., multimedia applications. In this research, we make use of QoS for CPU, memory and network bandwidth in pursuit of high speed and predictability on a distributed multicore platform which is constructed entirely from open source products. We evaluate the platform for latency and jitter, network throughput and CPU computation load. Finally, we analyze the result for applicability in industrial control domain.

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Section: Qos For Cpumentioning

confidence: 99%

Evaluating industrial applicability of virtualization on a distributed multicore platform

Mahmud

Sandström

Vulgarakis

2014

Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA)

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“…Additionally, this work studies the performance implications of such a deployment. Prior work done in [4] has shown that virtualized hosting impacts performance. IP telephony workloads have not been studied in a virtualized environment with reliability features.…”

Section: Background and Motivationmentioning

confidence: 99%

“…A background in virtualization is provided in [3] [4]. Due to the narrow interface between the VM and the VMM, a VM can be efficiently and transparently migrated to another physical host.…”

Section: High Availability Using Virtual Machinesmentioning

confidence: 99%

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Towards high-availability for IP telephony using virtual machines

Patnaik

Bijlani

Singh

2010

2010 IEEE 4th International Conference on Internet Multimedia Services Architecture and Application

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Abstract-Virtualization technology is popular today for hosting Internet and cloud-based compute services. Recently, the IP Communications domain has seen the adoption of virtualization with enterprise telephony solutions being hosted in virtualized environments. A deployment scenario that is common in the IP communications domain is the virtual appliance. A virtual appliance encapsulates the IP Telephony application, such as a VoIP Call/Proxy Server, and the OS software, within a virtual machine. This allows for a single physical machine to host a number of virtual appliances -each being a telephony application deployed on an OS configuration for which it has been optimized. Apart from the well known benefits of virtualization such as server consolidation and improved resource utilization, a promising capability of virtualization technology is that of live virtual machine migration. In case of failure, a live virtual appliance can be efficiently and transparently migrated to a different physical machine with minimal impact on clients using the hosted IP communication service, thereby providing high-availability and fault tolerance. This work studies the feasibility of deploying IP communications infrastructure on virtualized platforms, with high-availability and reliability as a goal. We model a real IP telephony workload to understand the performance implications of such a deployment, and the effectiveness of these high-availability mechanisms. We use quantitative methods to measure performance such as call throughput, delay and packet loss. By understanding the characteristics of IP telephony workloads, we identify specific aspects that affect performance and also identify some optimal configurations. The results presented in this work will be useful for telecommunication service providers to understand the benefits and limitations of such a deployment.

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“…However, some applications like IP telephony media servers and audio and video servers demonstrate inadequate performance when run on virtualized platforms [2] [3]. While traditionally considered real-time, such applications have enough intelligence to tolerate the lack of hard guarantees by the underlying server and network, and can be more accurately categorized as soft real-time applications.…”

Section: Introductionmentioning

confidence: 99%

Supporting soft real-time tasks in the xen hypervisor

Lee

Krishnakumar

Krishnan

et al. 2010

Proceedings of the 6th ACM SIGPLAN/SIGOPS International Conference on Virtual Execution Environments

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112

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Virtualization technology enables server consolidation and has given an impetus to low-cost green data centers. However, current hypervisors do not provide adequate support for real-time applications, and this has limited the adoption of virtualization in some domains. Soft real-time applications, such as media-based ones, are impeded by components of virtualization including lowperformance virtualization I/O, increased scheduling latency, and shared-cache contention. The virtual machine scheduler is central to all these issues. The goal in this paper is to adapt the virtual machine scheduler to be more soft-real-time friendly.We improve two aspects of the VMM scheduler -managing scheduling latency as a first-class resource and managing shared caches. We use enterprise IP telephony as an illustrative soft realtime workload and design a scheduler S that incorporates the knowledge of soft real-time applications in all aspects of the scheduler to support responsiveness. For this we first define a laxity value that can be interpreted as the target scheduling latency that the workload desires. The load balancer is also designed to minimize the latency for real-time tasks. For cache management, we take cache-affinity into account for real time tasks and load-balance accordingly to prevent cache thrashing. We measured cache misses and demonstrated that cache management is essential for soft real time tasks. Although our scheduler S employs a different design philosophy, interestingly enough it can be implemented with simple modifications to the Xen hypervisor's credit scheduler. Our experiments demonstrate that the Xen scheduler with our modifications can support soft real-time guests well, without penalizing non-real-time domains.

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Performance implications of hosting enterprise telephony applications on virtualized multi-core platforms

Cited by 14 publications

References 16 publications

Evaluating industrial applicability of virtualization on a distributed multicore platform

Evaluating industrial applicability of virtualization on a distributed multicore platform

Towards high-availability for IP telephony using virtual machines

Supporting soft real-time tasks in the xen hypervisor

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