[dpdk-dev] rte_get_tsc_cycles function slowly increase ?

[??????]

hi all,


rte_get_tsc_cycles function slowly increase, gettimeofday function is normally 
increase.

The following pseudo-code is my test example:
``` uint64_t hz = rte_get_tsc_hz(); uint64_t start_cycles = 
rte_get_tsc_cycles();           // running on first cpuuint64_t start_time = 
gettimeofday();                   // running on first cpu <perform 
operations&gt;                                    // running for 1 day or 2 day 
uint64_t end_cycles = rte_get_tsc_cycles();             // running on second 
cpuuint64_t end_time = gettimeofday();                     // running on first 
cpu
elapsed1_s = (end_cycles - start_cycles) / hz;elapsed2_s = (end_time - 
start_time);
``` 



I found a&nbsp;&nbsp;phenomenon&nbsp;that&nbsp;elapsed1_s 
is&nbsp;inaccurate,&nbsp;elapsed2_s is&nbsp;accurate. and the gap between 
elapsed2_s and&nbsp;elapsed1_s has&nbsp;increasingly widened.&nbsp;&nbsp;


why? how to explain the&nbsp;phenomenon or fix the problem.




Hope that helps! Regards, 
wang.