Justus Winter, le Fri 19 Dec 2014 02:48:56 +0100, a écrit :
> Use the ternary operator to implement `assert' like it is done in the
> glibc. The glibcs changelog does not mention the rationale behind
> this change, but it does improve our IPC performance.
Mmm, is it not a matter of changing the e
Justus Winter, le Fri 19 Dec 2014 02:48:58 +0100, a écrit :
> If the loop above completes at least one iteration, `i' will be larger
> than zero.
Ack.
> * linux/dev/glue/block.c (rdwr_full): Add assertion to appease the
> compiler.
> ---
> linux/dev/glue/block.c | 1 +
> 1 file changed, 1 insert
If the loop above completes at least one iteration, `i' will be larger
than zero.
* linux/dev/glue/block.c (rdwr_full): Add assertion to appease the
compiler.
---
linux/dev/glue/block.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/linux/dev/glue/block.c b/linux/dev/glue/block.c
index 79a36
Previously, `copyinmsg' was the same function as `copyin'. The former
is for messages, and the size of messages is a multiple of four.
Likewise for `copyoutmsg'.
Provide a specialized version of both functions. This shaves off a
couple of instructions and improves our IPC performance.
* i386/i3
Use the ternary operator to implement `assert' like it is done in the
glibc. The glibcs changelog does not mention the rationale behind
this change, but it does improve our IPC performance.
* kern/assert.h (assert): Define macro using the ternary operator.
---
kern/assert.h | 7 +++
1 file c
Hello,
I recently increased the maximum size of kernel message buffers that
are cached in commit 73314404. This greatly improved the overall
system performance.
This is a rework of said cache mechanism. It reduces the number of
cache misses even further, but its impact on performance is unclear
* ipc/ipc_kmsg.c (ipc_kmsg_get_from_kernel): Use the ikm cache.
(ipc_kmsg_put_to_kernel): Likewis.
---
ipc/ipc_kmsg.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/ipc/ipc_kmsg.c b/ipc/ipc_kmsg.c
index e16709c..dfbb3eb 100644
--- a/ipc/ipc_kmsg.c
+++ b/ipc/ipc_kmsg.c
@@
Keep a per-processor stack of free kernel messages buffers.
* ipc/ipc_kmsg.h (IKM_CACHE_SIZE): New macro.
(struct ipc_mksg_cpu_cache): New type.
(ipc_kmsg_cache): Use the new type for the cache.
(ikm_cache): Drop macro.
(ikm_cache_get, ikm_cache_put): New functions.
(ikm_free): Return buffers inst
