[dpdk-dev] how does it count the number of contiguous physical pages in map_all_hugepages
Jack,Xie Jie
jack.xie at dragonipt.com
Fri Jan 16 06:32:08 CET 2015
Hi,
I am learning DPDK recently, when I check l2fwd example, I am a little confused, please someone give me a clue.
In function map_all_hugepages called in rte_eal_hugepage_init,
There are lines of source code like below to count the number of contiguous physical pages,
But I check the source code, I just cannot find where is hugepg_tbl[j].physaddr be set before,
how can here check the value of hugepg_tbl[j].physaddr.
/* reserve a virtual area for next contiguous
* physical block: count the number of
* contiguous physical pages. */
for (j = i+1; j < hpi->num_pages[0] ; j++) {
if (hugepg_tbl[j].physaddr !=
hugepg_tbl[j-1].physaddr + hugepage_sz)
break;
}
Thanks !
Jack
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