increasing the number of threads results on a result of 0.0 MiB/s #545
Description
Running this command sysbench --memory-block-size=2G --memory-total-size=20G --threads=16 memory run I am getting this result:
sysbench 1.0.20 (using system LuaJIT 2.1.1720049189)
Running the test with following options:
Number of threads: 16
Initializing random number generator from current time
Running memory speed test with the following options:
block size: 2097152KiB
total size: 20480MiB
operation: write
scope: global
Initializing worker threads...
Threads started!
Total operations: 0 ( 0.00 per second)
0.00 MiB transferred (0.00 MiB/sec)
General statistics:
total time: 0.0008s
total number of events: 0
Latency (ms):
min: 0.00
avg: 0.00
max: 0.00
95th percentile: 0.00
sum: 0.00
Threads fairness:
events (avg/stddev): 0.0000/0.00
execution time (avg/stddev): 0.0000/0.00
However, if I set it to 8 threads, I get the following:
sysbench 1.0.20 (using system LuaJIT 2.1.1720049189)
Running the test with following options:
Number of threads: 8
Initializing random number generator from current time
Running memory speed test with the following options:
block size: 2097152KiB
total size: 20480MiB
operation: write
scope: global
Initializing worker threads...
Threads started!
Total operations: 8 ( 14.50 per second)
16384.00 MiB transferred (29697.41 MiB/sec)
General statistics:
total time: 0.5501s
total number of events: 8
Latency (ms):
min: 339.89
avg: 455.80
max: 549.95
95th percentile: 549.52
sum: 3646.36
Threads fairness:
events (avg/stddev): 1.0000/0.00
execution time (avg/stddev): 0.4558/0.07