Tài liệu BAD PERFORMANCE pptx

Ngày tải lên: 10/12/2013, 10:15

... the achievable theoretical peak performance from the basic performance character- istics of an architecture such as memory bandwidth and peak performance. If performance is limited by memory ... PeakPerf/F if it is limited by the peak performance. 4.2 Performance of BEST The performance limits imposed by the hardware together with the measured performance value can be found in...

Ngày tải lên: 24/12/2013, 19:15

... initializations and other overhead). The vec- tor performance achieved with the listed setups on a single CPU of the NEC machines is between 26% and 30% of the peak performance. Given that in any case only ... Erlangen-N¨urnberg, Cauerstraße 4, D-91058 Erlangen, Germany, {kberonov,durst,noezyilm}@lstm.uni-erlangen.de, 2 High Performance Computing Center Stuttgart (HLRS), Nobelstraße 19,...

Ngày tải lên: 24/12/2013, 19:15

... HIGH PERFORMANCE DRIVES  E Levi, 2001 56 v qs * v ds e φ r j ω φ r i i i a b c * v v * * α β s s v qs ' v ds ' - i ds * qs i * ω * - ω P+I - P+I P+I i ds * i qs * ω r * L s L σ s qs i ds i - + e -j ... ω sl * ω r * + + INDUCTION MACHINE Fig. 3.12 - Indirect (feed-forward) voltage fed rotor flux oriented induction machine. 3.4. PERFORMANCE OF A ROTOR FLUX ORIENTED INDUCTION MA...

Ngày tải lên: 26/12/2013, 01:17

... choosing the partitioning attribute. Selecting a proper partitioning attribute plays a crucial role in performance. Although in general any attributes of the operand relations may be chosen, two particular ... main memory. In this section, the above two problems will be discussed in order to achieve high performance of parallel join query processing. First, the main memory issue will be ad...

Ngày tải lên: 21/01/2014, 18:20

... with NRI-2/3 or PRI-2/3 or FRI-3. In this case, it is hard to predefine which one is better unless performance measure- ment is conducted. Discussions In wrapping up the comparison, it can be clearly ... parallel search query processing involving index. These index- ing structures clearly offer the best performance, especially for parallel one-index search query processing. The main differe...

Ngày tải lên: 21/01/2014, 18:20

... coordinator broadcasts the decision. Many variations and optimizations have been proposed to increase the performance of 2PC. But homogeneity and synchronous communication among sites is the basic assumption behind

Ngày tải lên: 21/01/2014, 18:20

... revisions to improve the performance, such as carefully selecting the initial clusters and means, or allowing clusters to split and merge, parallel processing may offer performance improvement ... mean, which becomes the centroid of each cluster, only convex-shaped clusters are generated. Ž Performance of k-means might not be ideal. Note that in each iteration the distance between each ....

Ngày tải lên: 21/01/2014, 18:20

... can help you in investigating performance problems. Chapter 7, Performance Engineering Starts at the Design Stage,” explains the holistic approach to performance engineering. Performance should be engineered ... Transaction Pro- cessing Performance Council (TCP), their Web site, and how you can use this information. Chapter 6, Performance Monitoring Tools,” gives an overview of some...

Ngày tải lên: 24/01/2014, 04:20

... can help you in investigating performance problems. Chapter 7, Performance Engineering Starts at the Design Stage,” explains the holistic approach to performance engineering. Performance should be engineered ... Transaction Pro- cessing Performance Council (TCP), their Web site, and how you can use this information. Chapter 6, Performance Monitoring Tools,” gives an overview of some...

Ngày tải lên: 17/02/2014, 15:20