Keywords: perfbook_html

## 6.3.5 Approximate Limit Counter Discussion

These changes greatly reduce the limit inaccuracy seen in the previous version, but present another problem: any given value of MAX_COUNTERMAX will cause a workload-dependent fraction of accesses to fall off the fastpath. As the number of threads increase, non-fastpath execution will become both a performance and a scalability problem. However, we will defer this problem and turn instead to counters with exact limits.