Given a cache line
n of a direct- mapped cache, a set S of program code blocks mapping to n, and an execution trace of program code blocks,
This machine has separate caches for data and instructions, where the size of the data cache is 64KB with 128-bytes cache lines
Through hardware assist, the entire tablewalk routine fits in two cache lines
of memory and provides a low-cost, flexible, and fairly fast TLB reload capability.
Namely, a relationship like (j mod 4) = 0 summarizes, that, in a sequence of unit-stride accesses in which four data elements fit on a cache line
, every fourth access will result in a cold miss.
This can still improve time because the entire compressed array now fits into a cache line
and the search (linear or binary) is done with processor registers [Degermark et al.
For array-based codes, a useful dynamic context would distinguish the first loop iteration from the remaining iterations (to capture temporal locality), and the loop iteration modulo the cache line
size (to capture spatial locality).
6) Note that this model only captures true communication and does not attempt to predict coherence missed due to the false sharing of separate items within the same cache line
[Eggers and Jeremiassen 1991; Torellas et al.
This eviction accesses one extra cache line
for the empty overflow buffer entry into which the evicted entry is written.
The chip set supports an in-order queue depth of eight, provides separate cache line
read and write buffers, optimizes the memory subsystem with support up to 1GB of Sync-DRAM and support of up to two Pentium(r) II processors and four Pentium(r) Pro class processors.
Supports adjustable cache line
write and invalidate
0 -- Supports adjustable cache line
write and invalidate transfers -- Flash ROM upgradeable firmware ensures future compatibility -- PCI short card form factor -- Two 68-pin 16-bit Wide Ultra SCSI-3 connectors -- 1 external,
Other performance enhancing features include a full PCI bandwidth large burst transfer capability that allows data bursts of up to 256 words to be transferred at full PCI bus speed, and the capability to automatically convert a PCI Read command to a Read Multiple command and when possible, read an entire cache line