PROCESSOR INVOLVEMENT IN COMMUNICATION in .NET

Creating QR Code in .NET PROCESSOR INVOLVEMENT IN COMMUNICATION
PROCESSOR INVOLVEMENT IN COMMUNICATION
Quick Response Code Recognizer In .NET Framework
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in .NET framework applications.
Consider the example of Figure 810(a), where the nodes of the depicted task graph were scheduled in the order A, C, B, which is their bottom-level order As communication eAB was scheduled together with node B, the time period after node A was already occupied by C A much shorter schedule length is achieved, when eAB starts immediately after A as shown in Figure 810(b) Even though there are cases where the delayed scheduling of communication can be of bene t (see Figure 88), in most situations the parallelization of the task graph is hindered with this approach The start time of a node is delayed not only by the total communication time of an entering edge but also by the execution times of the nodes scheduled between the origin node and the entering edge on the origin node s processor (in the example of Figure 810(a) this is node C between A and eAB on P1 ) In fact, a list scheduling with start time minimization based on this approach would schedule all nodes in Figure 810 on P1 , as the parallelization is never bene cial: the start/ nish time of each considered node is always earliest on P1 Moreover, this even generalizes to any fork task graph: list scheduling with start time minimization would produce a sequential schedule! Provisionally Scheduling Leaving Edges The direct application of the scheduling method from contention scheduling is inadequate under the new model Consequently, it is necessary to investigate how edges can be scheduled earlier Of course, the problem remains that at the time a free node is scheduled, it is not known to where its successors will be scheduled Nevertheless, the scheduling of the leaving edges must be prepared in some way The most viable solution is to reserve an appropriate time interval after a node for the later scheduling of the leaving edges This must be done in a worst case fashion, which means the interval must be large enough to accommodate all leaving edges A straightforward manner is to schedule all leaving edges on the source processor, directly after the origin node The scheduling of the edges on the links and the destination processors is not possible at that time, since the destination processors, and with them the routes, are undetermined Fortunately, this is also not necessary, as the scheduling on the links and the destination processor can take place when the destination node is scheduled, in the way it is done under the contention model If the destination node is scheduled on the same processor as the origin node, the corresponding edge, which was provisionally scheduled with the origin node, is simply removed from that processor As an example, Figure 811 depicts three Gantt charts illustrating the scheduling process of the task graph on the left side First, A is scheduled on P1 , together with its three leaving edges (shown in Figure 811(a)); hence, the worst case that B, C, and D are going to be scheduled on P2 is assumed Indeed, node B is scheduled on P2 , which includes the preceding scheduling of eAB on the link and on P2 Next, C is scheduled on P1 So the communication between A and C is local and eAC is removed from P2 The situation at this point is shown in Figure 811(b) Finally, D is scheduled on P2 with the respective scheduling of eAD on the link and P2 (Figure 811(c)) On heterogeneous systems, the described provisional scheduling of an edge on its source processor must consider that the involvement depends on the rst link of the
Painting QR-Code In VS .NET
Using Barcode creator for .NET Control to generate, create QR Code image in .NET applications.
Scanning Quick Response Code In Visual Studio .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET applications.
Barcode Recognizer In .NET Framework
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET applications.
Encoding QR Code JIS X 0510 In Visual Studio .NET
Using Barcode printer for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Bar Code Maker In VS .NET
Using Barcode creator for .NET Control to generate, create bar code image in .NET framework applications.
Code 128 Code Set B Generator In .NET
Using Barcode encoder for .NET Control to generate, create USS Code 128 image in Visual Studio .NET applications.
Draw GTIN - 13 In .NET
Using Barcode creation for ASP.NET Control to generate, create EAN-13 image in ASP.NET applications.
Creating Barcode In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create barcode image in .NET applications.
UPC - 13 Maker In Visual Basic .NET
Using Barcode encoder for .NET framework Control to generate, create EAN 13 image in VS .NET applications.
European Article Number 13 Decoder In VS .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.