无法让 sysbench 在最大时间停止

Question

我希望对机器进行压力测试，sysbench以便我可以获得每秒写入文件的 CPU 温度。现在测试运行超过了我设置的最长时间。如何让它在最大时间后停止？

#!/bin/bash
end=$((SECONDS+30))

echo $(vcgencmd measure_temp | egrep -o '[0-9]*\.[0-9]*') >> ~/research/temperatures.txt

sysbench --test=cpu --cpu-max-prime=2000000 run --max-time=10

while [ $SECONDS -lt $end ]; do
    echo $(vcgencmd measure_temp | egrep -o '[0-9]*\.[0-9]*') >> ~/research/temperatures.txt

done

然后测试运行了 20 多秒，并且在 10 秒时没有停止：

$ ./stress-test
sysbench 0.4.12:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 1

Doing CPU performance benchmark

Threads started!
Time limit exceeded, exiting...
Done.

Maximum prime number checked in CPU test: 2000000


Test execution summary:
    total time:                          24.7510s
    total number of events:              1
    total time taken by event execution: 24.7387
    per-request statistics:
         min:                              24738.74ms
         avg:                              24738.74ms
         max:                              24738.74ms
         approx.  95 percentile:         10000000.00ms

Threads fairness:
    events (avg/stddev):           1.0000/0.00
    execution time (avg/stddev):   24.7387/0.00

我现在只是将时间设置得很低，以确保测试停止而无需等待我将要测试的完整时间。