d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

eal: use --base-virtaddr for mapping rte_config as well

Browse Source 
Use --base-virtaddr to set the address of rte_config file along with
start address of the hugepages. Since the user would likely expect
the hugepages to be starting at the specified address, the specified
address will likely be rounded to either 2M or 1G. So, in order to
not waste space, we subtract the length of the config (and align it
on page boundary) from the base virtual address and map the config
just before the hugepages.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
This commit is contained in:
Anatoly Burakov 2014-06-20 16:42:17 +01:00 committed by Thomas Monjalon
parent 6258f1c942
commit fa02c869f1
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
lib/librte_eal/linuxapp/eal/eal.c
View File

@ -213,6 +213,14 @@ rte_eal_config_create(void)
if (internal_config.no_shconf)
return;
/* map the config before hugepage address so that we don't waste a page */
if (internal_config.base_virtaddr != 0)
rte_mem_cfg_addr = (void *)
RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
else
rte_mem_cfg_addr = NULL;
if (mem_cfg_fd < 0){
mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
if (mem_cfg_fd < 0)
@ -232,7 +240,7 @@ rte_eal_config_create(void)
"process running?\n", pathname);
}
rte_mem_cfg_addr = mmap(NULL, sizeof(*rte_config.mem_config),
rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
if (rte_mem_cfg_addr == MAP_FAILED){