Update cpu_work_per_thread calculation to better match cpu-benchmark

Signed-off-by: Steven Hahn <hahnse@ornl.gov>

Author: quantumsteve

bin/wfbench

@@ -186,7 +186,7 @@ class CPUBenchmark:
             return [None, None]
 
         total_mem = f"{self.total_mem}B" if self.total_mem else f"{100.0 / os.cpu_count()}%"
-        cpu_work_per_thread = int(1000000 * self.work / (16384 * self.cpu_threads)) if self.cpu_threads != 0 else int32_max ** 2
+        cpu_work_per_thread = int(1000000 * self.work / (self.cpu_threads)) if self.cpu_threads != 0 else int32_max ** 2
         cpu_samples = min(cpu_work_per_thread, int32_max)
         cpu_ops = (cpu_work_per_thread + int32_max - 1) // int32_max
         if cpu_ops > int32_max: