Test SSD write speed under Linux

Recently bought a 256GB SSD SSD, want to test the write speed, so the following operation.

Part of the code:

1Gettimeofday (&start, NULL);2     intFD = open ("Test1.dat", o_rdwr|o_creat);3     if(FD <0){4printf"Open error!\n");5         return 0;6     }7 //Lseek (FD, 0, seek_set);8 Write (FD, PData, Data_len);9 Close (FD);TenGettimeofday (&end, NULL); One  A //display elapsed time in US -diff =1000000* (END.TV_SEC-START.TV_SEC) + (End.tv_usec-start.tv_usec); -  theprintf"The data length is%d\n Byte", Data_len); -printf"The difference is%ld us\n", diff);

Test one, the data size 288,000 byte,5 times the maximum time, the write speed is about 288000 Byte/2058us = 133.46 MB/s

Test two, data size 1,440,000 byte = 1.37mb,5 takes the longest time, the write speed is about 1440000 byte/9356 US = 146.78 MB/s

Test three, data size 14,400,000 byte = 13.7mb,5 take maximum time, then write speed is about 14400000 byte/100234 US = 137.01mb/s

Test SSD write speed under Linux