Cache read

DC maintains a synopsys cache directory, where DW components which are inferred (or instantiated) from technology library cells are saved (or written out). This prevents the need to re-build these components, each time a compile step is executed. Reading and writing to this location is controlled by the cache read and cache write variables. Also, if the cache read info and cache writeJnfo variable are set to true, DC issues a message each time the cache is written to, or read from. 

Reading and writing to the cache is controlled by the cache read and cache.write variables. Ensure that these variables point to your home directoiy or to any shared cache that might exist for your design team. 

Performance (CPU [central processing unit], bus, cache, clock etc.) Capacities (RAM [random access memory], hard disk, floppy disk, DAT [digital audio tape], CD-ROM [compact disk, read-only memory], etc.)... 

In Figure 2.15, a single HCA is connected, which provides connectivity to the other nodes on the network. The node shown has a shared memory architecture in which all the sixteen processors have direct access to all the memory. In a shared memory architecture, data from the same memory can be read by several processors and, hence, may be stored in multiple caches if one of the processors then changes its data, the system may have two inconsistent copies of this data, resident in different cache entries. This situation is dealt with by cache-coherency support in hardware, which will invalidate data in other caches whenever the data in the local caches change. Such invalidation generates additional traffic on the network connecting the processors within the node, and this can impact the performance of the computer, especially when the number of processors in the node is large. 

For the StageO, the input variables are Ilock and Py. The output variable is ly. If Ilock = 0 (meaning the unit is unlocked), the value for ly will be fetched from the cache memory according to the destination address of instruction Py. Simultaneously the result of instruction Py will be computed, we will omit how this is done. Here we use a function sons which can read the descending instruction of Py from the cache memory. If Ilock = 1, the unit is locked, then the output remains the stable. The formal ITL specification of StageO can be described as follows ... 

The memory in the memory hierarchy of a computer system is used to store information, instructions, and data that will be used by the computer system. Memory is often classified as registers, cache memory, main memory, hard disk, floppy disk, and tapes. These are pictured in a hierarchal form in Fig. 10 with locations within each type of memory randomly accessible except for tapes. Tapes are sequentially accessible, and in the long run each disk data unit is accessible in equal time, but at a given time the access time for a particular unit is dependent on the location of the disk components. The term access designates the memory activities that are associated with either a read or a write. Randomly accessible means that a memory location may be read or written in the same amount of time irregardless of the order of accesses of memory locations, and sequentially accessible means that the time required to access a memory location is dependent on location of the immediate prior memory access. 

Memory Designs can contain read-only memory (ROM), dynamic random-access memory (DRAM), and static random-access memory (SRAM). In addition, MICON also supports the use of cache memtMies wh cache controller chips exist in the family, such as the Intel 80386/82385 combination. 

Note that both caches are always enabled (TSIM emulates caches, and is considered to offer an 80% timing accuracy [9]), as well as instmction burst. Both when using traces and breakpoints, the timestamp is not obtained within the OBSW execution but from the simulator, by reading the current CPU cycle counter from TSIM, with a clock resolution of 20 ns. Hence the operation to get the current time does not affect the simulated time. 

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