我是IOzone的新用户，当我使用命令:./iozone -i 0 -i 1 -t 2 -T运行IOzone时，它生成以下结果(部分):
Command line used: ./iozone -i 0 -i 1 -t 2 -T Output is in Kbytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 Kbytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. Throughput test with 2 threads Each thread writes a 512 Kbyte file in 4 Kbyte records
Children see throughput for 2 initial writers = 650943.69 KB/sec
Parent sees throughput for 2 initial writers = 13090.24 KB/sec
Min throughput per thread = 275299.72 KB/sec
Max throughput per thread = 375643.97 KB/sec
Avg throughput per thread = 325471.84 KB/sec
Min xfer = 356.00 KB
Children see throughput for 2 rewriters = 1375881.50 KB/sec
Parent sees throughput for 2 rewriters = 10523.74 KB/sec
Min throughput per thread = 1375881.50 KB/sec
Max throughput per thread = 1375881.50 KB/sec
Avg throughput per thread = 687940.75 KB/sec
Min xfer = 512.00 KB
Children see throughput for 2 readers = 2169601.25 KB/sec
Parent sees throughput for 2 readers = 27753.94 KB/sec
Min throughput per thread = 2169601.25 KB/sec
Max throughput per thread = 2169601.25 KB/sec
Avg throughput per thread = 1084800.62 KB/sec
Min xfer = 512.00 KB
Children see throughput for 2 re-readers = 2572435.25 KB/sec
Parent sees throughput for 2 re-readers = 26311.78 KB/sec
Min throughput per thread = 2572435.25 KB/sec
Max throughput per thread = 2572435.25 KB/sec
Avg throughput per thread = 1286217.62 KB/sec
Min xfer = 512.00 KB
iozone test complete.
我对"吞吐量"one_answers"最小汇款"的含义感到困惑，有人可以帮助我吗?顺便问一下，为什么从孩子和父母身上看到的吞吐量是不同的?谢谢!
最小xfer是指一次写入的数据量最小。"每个线程在4kbyte的记录中写入一个512kbyte的文件"
因此，如果最小xfer是512.00 KB，它会一次将整个实际文件写入磁盘(将所有4kbyte的记录分组在一起)。
由于操作系统I/O缓冲，子节点和父节点吞吐量不同。在吞吐量测试中，Iozone不会强制直接(非缓冲)读写。你真正测试的是系统的缓冲缓存+磁盘缓存+磁盘速度组合。