Stand-alone nSIM platform has the only peripheral which is serial port.
That means support of networking and mice makes no sense for it.
Moreover removal of networking alone gives us 2 nice benefits:
1. Build happens faster
On my machine I'm seeing this:
Existing defconfig:
real 2m37.887s
user 8m22.077s
sys 0m35.995s
New defconfig:
real 1m35.351s
user 5m11.988s
sys 0m25.211s
Which gives us ~60% speed-up.
2. Memory footprint is smaller:
arc-linux-size vmlinux.org
text data bss dec hex filename
5829381 798756 257280 6885417 691029 vmlinux.org
arc-linux-size vmlinux.new
text data bss dec hex filename
4426769 526348 225244 5178361 4f03f9 vmlinux.new
Though this has one down-side - UNIX sockets are disabled an so on
attempt to run hackbench by default user will see:
--------------------->8-------------------
hackbench
Running in process mode with 10 groups using 40 file descriptors each
(== 400 tasks)
Each sender will pass 100 messages of 100 bytes
Creating fdpair (error: Function not implemented)
--------------------->8-------------------
Still it's possible to ask hackbench to use pipes instead like this:
--------------------->8-------------------
hackbench -p
Running in process mode with 10 groups using 40 file descriptors each
(== 400 tasks)
Each sender will pass 100 messages of 100 bytes
Time: 9.216
--------------------->8-------------------
Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
---
arch/arc/configs/nsim_700_defconfig | 16 +---------------
arch/arc/configs/nsim_hs_defconfig | 13 +------------
arch/arc/configs/nsim_hs_smp_defconfig | 12 +-----------
3 files changed, 3 insertions(+), 38 deletions(-)
diff --git a/arch/arc/configs/nsim_700_defconfig b/arch/arc/configs/nsim_700_defconfig
index b0066a749d4c..80bd8faecb95 100644
--- a/arch/arc/configs/nsim_700_defconfig
+++ b/arch/arc/configs/nsim_700_defconfig
@@ -2,7 +2,6 @@
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
-CONFIG_POSIX_MQUEUE=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
@@ -27,22 +26,12 @@ CONFIG_ARC_PLAT_SIM=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsim_700"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_UNIX_DIAG=y
-CONFIG_NET_KEY=y
-CONFIG_INET=y
-# CONFIG_IPV6 is not set
CONFIG_DEVTMPFS=y
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
-CONFIG_NETDEVICES=y
-CONFIG_ARC_EMAC=y
-CONFIG_LXT_PHY=y
-# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
@@ -55,11 +44,8 @@ CONFIG_SERIAL_ARC_CONSOLE=y
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
-CONFIG_EXT2_FS=y
-CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
-CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
# CONFIG_DEBUG_PREEMPT is not set
diff --git a/arch/arc/configs/nsim_hs_defconfig b/arch/arc/configs/nsim_hs_defconfig
index ebe9ebb92933..ad8e7e53ab26 100644
--- a/arch/arc/configs/nsim_hs_defconfig
+++ b/arch/arc/configs/nsim_hs_defconfig
@@ -2,7 +2,6 @@
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
-CONFIG_POSIX_MQUEUE=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
@@ -31,19 +30,12 @@ CONFIG_ISA_ARCV2=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsim_hs"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_UNIX_DIAG=y
-CONFIG_NET_KEY=y
-CONFIG_INET=y
-# CONFIG_IPV6 is not set
CONFIG_DEVTMPFS=y
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
-# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
@@ -56,11 +48,8 @@ CONFIG_SERIAL_ARC_CONSOLE=y
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
-CONFIG_EXT2_FS=y
-CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
-CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
# CONFIG_DEBUG_PREEMPT is not set
diff --git a/arch/arc/configs/nsim_hs_smp_defconfig b/arch/arc/configs/nsim_hs_smp_defconfig
index 4bde43278be6..d0e609e26bfb 100644
--- a/arch/arc/configs/nsim_hs_smp_defconfig
+++ b/arch/arc/configs/nsim_hs_smp_defconfig
@@ -30,19 +30,12 @@ CONFIG_SMP=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsim_hs_idu"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_UNIX_DIAG=y
-CONFIG_NET_KEY=y
-CONFIG_INET=y
-# CONFIG_IPV6 is not set
CONFIG_DEVTMPFS=y
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
-# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
@@ -55,10 +48,7 @@ CONFIG_SERIAL_ARC_CONSOLE=y
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
-CONFIG_EXT2_FS=y
-CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
-CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
--
2.7.4
