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eal: add --in-memory option

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This command-line option will cause DPDK to operate entirely in
memory and not create any shared files at runtime, including any
shared configuration or hugetlbfs files. This is useful for debug
purposes, as well as for certain use cases like containers or
automatic memory cleanup.

Currently, this option acts as a strict superset of --no-shconf and
--huge-unlink commands.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
This commit is contained in:
Anatoly Burakov 2018-07-13 13:48:03 +01:00 committed by Thomas Monjalon
parent d435aad37d
commit 14de8734c4
3 changed files with 20 additions and 4 deletions
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18
lib/librte_eal/common/eal_common_options.c
View File

@ -66,6 +66,7 @@ eal_long_options[] = {
{OPT_NO_HUGE, 0, NULL, OPT_NO_HUGE_NUM },
{OPT_NO_PCI, 0, NULL, OPT_NO_PCI_NUM },
{OPT_NO_SHCONF, 0, NULL, OPT_NO_SHCONF_NUM },
{OPT_IN_MEMORY, 0, NULL, OPT_IN_MEMORY_NUM },
{OPT_PCI_BLACKLIST, 1, NULL, OPT_PCI_BLACKLIST_NUM },
{OPT_PCI_WHITELIST, 1, NULL, OPT_PCI_WHITELIST_NUM },
{OPT_PROC_TYPE, 1, NULL, OPT_PROC_TYPE_NUM },
@ -1170,6 +1171,13 @@ eal_parse_common_option(int opt, const char *optarg,
conf->no_shconf = 1;
break;
case OPT_IN_MEMORY_NUM:
conf->in_memory = 1;
/* in-memory is a superset of noshconf and huge-unlink */
conf->no_shconf = 1;
conf->hugepage_unlink = 1;
break;
case OPT_PROC_TYPE_NUM:
conf->process_type = eal_parse_proc_type(optarg);
break;
@ -1321,8 +1329,8 @@ eal_check_common_options(struct internal_config *internal_cfg)
"be specified together with --"OPT_NO_HUGE"\n");
return -1;
}
if (internal_cfg->no_hugetlbfs && internal_cfg->hugepage_unlink) {
if (internal_cfg->no_hugetlbfs && internal_cfg->hugepage_unlink &&
!internal_cfg->in_memory) {
RTE_LOG(ERR, EAL, "Option --"OPT_HUGE_UNLINK" cannot "
"be specified together with --"OPT_NO_HUGE"\n");
return -1;
@ -1330,12 +1338,12 @@ eal_check_common_options(struct internal_config *internal_cfg)
if (internal_config.force_socket_limits && internal_config.legacy_mem) {
RTE_LOG(ERR, EAL, "Option --"OPT_SOCKET_LIMIT
" is only supported in non-legacy memory mode\n");
return -1;
}
if (internal_cfg->single_file_segments &&
internal_cfg->hugepage_unlink) {
RTE_LOG(ERR, EAL, "Option --"OPT_SINGLE_FILE_SEGMENTS" is "
"not compatible with --"OPT_HUGE_UNLINK"\n");
"not compatible with neither --"OPT_IN_MEMORY" nor "
"--"OPT_HUGE_UNLINK"\n");
return -1;
}
@ -1386,6 +1394,8 @@ eal_common_usage(void)
" Set specific log level\n"
" -v Display version information on startup\n"
" -h, --help This help\n"
" --"OPT_IN_MEMORY" Operate entirely in memory. This will\n"
" disable secondary process support\n"
"\nEAL options for DEBUG use only:\n"
" --"OPT_HUGE_UNLINK" Unlink hugepage files after init\n"
" --"OPT_NO_HUGE" Use malloc instead of hugetlbfs\n"

4
lib/librte_eal/common/eal_internal_cfg.h
View File

@ -41,6 +41,10 @@ struct internal_config {
volatile unsigned vmware_tsc_map; /**< true to use VMware TSC mapping
* instead of native TSC */
volatile unsigned no_shconf; /**< true if there is no shared config */
volatile unsigned in_memory;
/**< true if DPDK should operate entirely in-memory and not create any
* shared files or runtime data.
*/
volatile unsigned create_uio_dev; /**< true to create /dev/uioX devices */
volatile enum rte_proc_type_t process_type; /**< multi-process proc type */
/** true to try allocating memory on specific sockets */

2
lib/librte_eal/common/eal_options.h
View File

@ -45,6 +45,8 @@ enum {
OPT_NO_PCI_NUM,
#define OPT_NO_SHCONF "no-shconf"
OPT_NO_SHCONF_NUM,
#define OPT_IN_MEMORY "in-memory"
OPT_IN_MEMORY_NUM,
#define OPT_SOCKET_MEM "socket-mem"
OPT_SOCKET_MEM_NUM,
#define OPT_SOCKET_LIMIT "socket-limit"