[dpdk-dev] [PATCH 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. Currently, the max number of memory channels are hardcoded to 4. However,
   on a POWER8 machine, the max number of memory channels are 8. To fix this,
   CONFIG_RTE_MAX_NCHANNELS is added to do the configuration.

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

diff --git a/config/common_base b/config/common_base
index dbd405b..1beea32 100644
--- a/config/common_base
+++ b/config/common_base
@@ -83,10 +83,11 @@ CONFIG_RTE_CACHE_LINE_SIZE=64
 # Compile Environment Abstraction Layer
 #
 CONFIG_RTE_LIBRTE_EAL=y
-CONFIG_RTE_MAX_LCORE=128
+CONFIG_RTE_MAX_LCORE=256
 CONFIG_RTE_MAX_NUMA_NODES=8
 CONFIG_RTE_MAX_MEMSEG=256
 CONFIG_RTE_MAX_MEMZONE=2560
+CONFIG_RTE_MAX_NCHANNELS=8
 CONFIG_RTE_MAX_TAILQ=32
 CONFIG_RTE_LOG_LEVEL=8
 CONFIG_RTE_LOG_HISTORY=256
diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 29942ea..6c268c1 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -798,7 +798,7 @@ eal_parse_common_option(int opt, const char *optarg,
 	case 'n':
 		conf->force_nchannel = atoi(optarg);
 		if (conf->force_nchannel == 0 ||
-		    conf->force_nchannel > 4) {
+		    conf->force_nchannel > RTE_MAX_NCHANNELS) {
 			RTE_LOG(ERR, EAL, "invalid channel number\n");
 			return -1;
 		}
-- 
1.7.1