[dpdk-dev] [PATCH v2 1/2] Fix CPU and memory parameters on IBM POWER8

[Chao Zhu]

This patch fixes the max logic number and memory channel number settings
on IBM POWER8 platform.
1. The max number of logic cores of a POWER8 processor is 96. Normally,
   there are two sockets on a server. So the max number of logic cores
   are 192. So this parch set CONFIG_RTE_MAX_LCORE to 256.
2. The socket number on POWER8 little endian platform can be larger than 16.
   This patch set CONFIG_RTE_MAX_NUMA_NODES to 32 for POWER8.
3. Currently, the max number of memory channels are hardcoded to 4. However,
   on a POWER8 machine, the max number of memory channels are 8. This patch
   removes the constraint.

Signed-off-by: Chao Zhu <chaozhu at linux.vnet.ibm.com>
---
 config/defconfig_ppc_64-power8-linuxapp-gcc |    2 ++
 lib/librte_eal/common/eal_common_options.c  |    3 +--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/config/defconfig_ppc_64-power8-linuxapp-gcc b/config/defconfig_ppc_64-power8-linuxapp-gcc
index a80a19e..9eb0cc4 100644
--- a/config/defconfig_ppc_64-power8-linuxapp-gcc
+++ b/config/defconfig_ppc_64-power8-linuxapp-gcc
@@ -36,6 +36,8 @@ CONFIG_RTE_ARCH="ppc_64"
 CONFIG_RTE_ARCH_PPC_64=y
 CONFIG_RTE_ARCH_64=y
 
+CONFIG_RTE_MAX_LCORE=256
+CONFIG_RTE_MAX_NUMA_NODES=32
 CONFIG_RTE_CACHE_LINE_SIZE=128
 
 CONFIG_RTE_TOOLCHAIN="gcc"
diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 29942ea..2b418d5 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -797,8 +797,7 @@ eal_parse_common_option(int opt, const char *optarg,
 	/* force number of channels */
 	case 'n':
 		conf->force_nchannel = atoi(optarg);
-		if (conf->force_nchannel == 0 ||
-		    conf->force_nchannel > 4) {
+		if (conf->force_nchannel == 0) {
 			RTE_LOG(ERR, EAL, "invalid channel number\n");
 			return -1;
 		}
-- 
1.7.1