perf: Have arches handle the backtrace

[akaros.git] / Kconfig

diff --git a/Kconfig b/Kconfig
index 9d3a537..0813fed 100644 (file)
--- a/Kconfig
+++ b/Kconfig
@@ -11,9 +11,23 @@ config SRCARCH
 
 config 64BIT
        bool "64-bit kernel"
+       default y
+       help
+               Say yes to build a 64-bit kernel.  Must be 'y' for x86.
+
+menuconfig RUN_INIT_SCRIPT
+       bool "Run init script after boot"
        default n
        help
-               Say yes to build a 64-bit kernel, amd64 / x86_64, riscv64, etc.
+               Run an init script after boot instead of dropping into the monitor
+
+config INIT_SCRIPT_PATH_AND_ARGS
+    depends on RUN_INIT_SCRIPT
+    string "Path to init script, followed by its arguments."
+    default /bin/init.sh
+    help
+               Path to the init script run at boot time, followed by a space separated
+               list of arguments
 
 source "kern/arch/$SRCARCH/Kconfig"
 
@@ -65,6 +79,22 @@ config EXT2_BDEV
 
 endmenu
 
+choice COREALLOC_POLICY
+       prompt "Core Allocation Policy"
+       help
+               Select a policy for allocating cores to a process upon request.  All
+               strategies first allocate cores from the set of provisioned cores for a
+               process, but differ in how they select cores beyond this.
+
+config COREALLOC_FCFS
+       bool "Simple FCFS"
+       help
+               Allocate cores to processes on a first-come-first-served basis. All
+               cores are treated equally, and no topology information is used to try
+               and optimize which cores are given to which processes upon request.
+
+endchoice
+
 menu "Memory Management"
 
 config PAGE_COLORING
@@ -109,6 +139,12 @@ config TRACE_LOCKS
 
 endmenu
 
+config DEVELOPMENT_ASSERTIONS
+       bool "dasserts"
+       default n
+       help
+               Turn on dassert() in code, dassert will compile to assert().
+
 config SPINLOCK_DEBUG
        bool "Spinlock debugging"
        default n
@@ -133,6 +169,29 @@ config SEMAPHORE_DEBUG
                semaphore was downed, and provides a linked list of all semaphores that
                have waiters.  This will slow down all semaphore ups and downs.
 
+config SEM_SPINWAIT
+       bool "Semaphore spinwaiting"
+       default n
+       help
+               Turns on semaphore spinwaiting.  In lieu of intelligent Adaptive
+               Mutexes, busy semaphores will just spin for a while before fully
+               sleeping.
+
+config SEM_SPINWAIT_NR_LOOPS
+       int "Number of polls before sleeping"
+       depends on SEM_SPINWAIT
+       default 100
+       help
+               How many times to poll a busy semaphore before going to sleep.
+
+config SEM_TRACE_BLOCKERS
+       bool "Semaphore Blocker Tracing"
+       default n
+       help
+               Drops a TRACEME whenever a semaphore would block (barring slight
+               races).  To access the trace data, you'll need to use the opcontrols
+               and process the data with op2.
+
 config RESET_STACKS
        bool "Reset Stacks"
        default y
@@ -184,14 +243,24 @@ config SYSCALL_STRING_SAVING
                kthread, which can be viewed when debugging semaphores.  Individual
                syscalls can save info in this buffer.
 
-endmenu
+config BLOCK_EXTRAS
+       bool "Block Extra Data"
+       default y
+       help
+               Extends blocks to have a list of other memory blocks.  Useful for
+               networking performance.  This is only an option while we debug the
+               implementation.  Say y.  If you have networking bugs, try turning this
+               off, and if that helps, tell someone.
 
-config VM
-       bool "Virtual Machine support"
+config BETTER_BACKTRACE
+       bool "Better backtraces, less optimizations"
        default n
        help
-               VM support -- not working! Based on KVM.
+               The kernel uses the frame pointer and call stacks for backtraces.
+               Tail-call optimizations remove some of this information.  Say 'Y' here
+               to have better backtraces, at the expense of performance.
 
+endmenu
 
 menu "Misc/Old Options"
 
@@ -233,4 +302,6 @@ config BSD_ON_CORE0
 
 endmenu
 
+source "kern/lib/Kconfig"
+
 source "kern/src/ktest/Kconfig"