On 06/30/2016 12:37 AM, Peter Lieven wrote:
evaluation with the recently introduced maximum stack usage monitoring revealed
that the actual used stack size was never above 4kB so allocating 1MB stack
for each coroutine is a lot of wasted memory. So reduce the stack size to
64kB which should still give enough head room.
Signed-off-by: Peter Lieven <p...@kamp.de>
---
include/qemu/coroutine_int.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/qemu/coroutine_int.h b/include/qemu/coroutine_int.h
index eac323a..f84d777 100644
--- a/include/qemu/coroutine_int.h
+++ b/include/qemu/coroutine_int.h
@@ -28,7 +28,7 @@
#include "qemu/queue.h"
#include "qemu/coroutine.h"
-#define COROUTINE_STACK_SIZE (1 << 20)
+#define COROUTINE_STACK_SIZE (1 << 16)
typedef enum {
COROUTINE_YIELD = 1,
Ought we check that this is not smaller than
sysconf(_SC_THREAD_STACK_MIN)
which (for glibc at least), is 192k for ia64, 128k for aarch64, mips and tile
(though why it is quite so high in those later cases I don't know).
r~
