[uml-devel] [PATCH] Update UBD to use pread/pwrite family of functions

This decreases the number of syscalls per read/write by half. Signed-off-by: Anton Ivanov --- arch/um/drivers/ubd_kern.c | 27 +-- arch/um/include/shared/os.h | 2 ++ arch/um/os-Linux/file.c | 19 +++ 3 files changed, 26

[uml-devel] [PATCH] Missing includes in start up

Modifying RLIMIT requires including sys/time.h and sys/resource.h Signed-off-by: Anton Ivanov --- arch/um/os-Linux/start_up.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c index 425162e..c1811df 100644 ---

Re: [uml-devel] [PATCH] Missing includes in start up

Hi Richard, This is vs your tree, 4.x master branch in linus repo actually has sys/resource.h Pls ignore the patch. A. On 08/11/15 14:58, Anton Ivanov wrote: > Modifying RLIMIT requires including sys/time.h and sys/resource.h > > Signed-off-by: Anton Ivanov > --- >

Re: [uml-devel] [PATCH] Update UBD to use pread/pwrite family of functions

I am going to send in a couple of more which bulk-up the transactions (this forms most of the improvement) later this week. This one is obvious - qemu has been using it for ages. A. On 08/11/15 15:20, Anton Ivanov wrote: > This decreases the number of syscalls per read/write by half. > >

Re: [uml-devel] [PATCH] Missing includes in start up

No worries. A completely rewritten IRQ controller patch is coming in ~ 15 minutes or so. 20% gain across the board for a basic config, up to 100s% gain if you register large numbers of devices (in the tens). Just finishing to run it through its paces :) It is also a pre-requisite to do

Re: [uml-devel] [PATCH] Missing includes in start up

On Sun, Nov 8, 2015 at 4:18 PM, Anton Ivanov wrote: > Hi Richard, > > This is vs your tree, 4.x master branch in linus repo actually has > sys/resource.h > > Pls ignore the patch. Sorry for the trouble! I forgot to mention that linux-next is the only valid branch in my tree.

[uml-devel] [PATCH] EPOLL Interrupt Controller V2.0

Epoll based interrupt controller. IMPROVES: IO loop performance - no per fd lookups, allowing for 15% IO speedup in minimal config going to 100s of % with many devices - a N^N lookup is now replaced by a log(N) ADDS: True Write IRQ functionality OBSOLETES: The need to call reactivate_fd() in

Re: [uml-devel] [PATCH] EPOLL Interrupt Controller V2.0

This works cleanly and is understandable (something I would not say about the original version I wrote a couple of years back). It emits some minor nags on shutdown related to cleaning up the term descriptors, but as far as I can see they are mostly harmless. I suspect that once I do an

Re: [uml-devel] [PATCH] EPOLL Interrupt Controller V2.0

I just noted one minor issue with it (which existed in the earlier version as well) - it leaks one FD per reboot. I will fix it later on during the week in a revised version. A. On 08/11/15 22:50, Anton Ivanov wrote: > Epoll based interrupt controller. > > IMPROVES: IO loop performance - no