Hi RIchard, hi list,
There is some problem with the list on sourceforge. It has bounced one
of the patches - no 4.
I can resend this for book-keeping purposes.
If memory serves me right there are no changes in this particular one so
the earlier version (3) from ~ 2 weeks ago can be used instead.
From: Anton Ivanov
If the ubd is asynchronous the amount of time uml will spend
fsync-ing on FLUSH is unpredictable. There are bits in the upper fs
layers that really dislike this. Replacing fsync() with an
async flush request via sync_file_range mitigates this (somewhat),
improves performance si
From: Anton Ivanov
This patch adds an extra timer source which has correct timing
and uses an up-to-date OS API and.
Results - correct kernel behaviour on timer related tasks.
1. Improvement in network performance (TCP state machines
are now fed correct time).
2. Correct QoS and traffic
From: Anton Ivanov
This transport allows a UML to connect to another UML local
or remote, the Linux host or any other network device running
the industry standard Ethernet over GRE protocol. The transport
supports all features of RFC 2784.
The transport supports a common set of features with the
From: Anton Ivanov
Support for multi-packet vector IO - multiple packets
read in one syscall and (optionally) written in one syscall.
Support for (optional) queueing on EAGAIN/ENOBUFS - applies
only to socket transports. Sorry TAP, -EYOULOSE - it will remain
slower than any so
From: Anton Ivanov
1. Minimum kernel 2.5.44
2. No "walk the list" lookups for received IRQs - immediate identification
of the correct handler to invoke
3. Full set of IRQ semantics - edge, level, read, write
3.1. Write is now a *REAL* write - so if you (ab)use the
write to signify NONE (a
From: Anton Ivanov
The epoll based controller has real (not emulated) edge and
level semantics and the edge/level is handled by epoll. There
is no toggling of the poll set any more, thus it is removed
throughout
Signed-off-by: Anton Ivanov
---
arch/um/drivers/chan_kern.c |2 --
arch/um
From: Anton Ivanov
The use of the seek()/read() and seek()/write() is a terminal
disease on NUMA. Intense use of this on shared files (f.e.
the master for a COW image) can cause anything up to and including
killing CPUs on unhandled NMIs.
This patch deals with this UML major issue (and one of UM
From: Anton Ivanov
socketpair() is a better IPC choice for lots of small requests
as it allows deeper (and configurable) queues than pipe()
As a result UBD will process nearly all of the requests submitted
to it instead of bouncing a significant percentage under load
Signed-off-by: Anton Ivanov
This is an update of the performance improvement patchset, it
addresses a number of issues resulting from porting what was
originally written for 3.3.8 to the current linux kernel.
Changes (where applicable) are annotated in actual patchsets.
A.
From: Anton Ivanov
Obvious performance optimization - it is not necessary
to read the requests one at a time in the IRQ handler
Signed-off-by: Anton Ivanov
---
arch/um/drivers/ubd_kern.c | 29 ++---
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/arch/u
From: Anton Ivanov
This is an alternative to the well known pcap transport.
In the absense of special hardware support pcap is slow,
guaranteed to be slow and with significant penalties on
NUMA/SMP systems due to the timestamping of every packet.
This transport does not incur any of these times
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