Give AHCI disk serial based on backing file path same as for virtio block.
It is still not good that they may intersect on different hosts, but that
is better then intersecting on the same host.
Rewrite virtio block device driver to work asynchronously and use the block
I/O interface.
Asynchronous operation, based on r280026 change, allows to not block virtual
CPU during I/O processing, that on slow/busy storage can take seconds.
Use of recently improved block I/O interface allows to process multiple
requests same time, that improves random I/O performance on wide storages.
Benchmarks of virtual disk, backed by ZVOL on RAID10 pool of 4 HDDs, show
~3.5 times random read performance improvements, while no degradation on
linear I/O. Guest CPU usage during test dropped from 100% to almost zero.
Modify virtqueue helpers added in r253440 to allow queuing.
Original virtqueue design allows queued and out-of-order processing, but
helpers added in r253440 suppose only direct blocking in-order one.
It could be fine for network, etc., but it is a huge limitation for storage
devices.
On parallel random I/O this allows better utilize wide storage pools.
To not confuse prefetcher on linear I/O, consecutive requests are executed
sequentially, following the same logic as was earlier implemented in CTL.
Benchmarks of virtual AHCI disk, backed by ZVOL on RAID10 pool of 4 HDDs,
show ~3.5 times random read performance improvements, while no degradation
on linear I/O.
Receive filter configuration is done in nge_rxfilter(). Remove
unnecessary filter configuration code in nge_init_locked().
While I'm here add a check for driver running state for multicast
filter handling. Also remove unnecessary assignment to error
variable since it is cleared in the function entry.
Fix a bug introdiced in r217548. According to NS DP83815 data
sheet, RX filter should be disabled before programming.
Previously it was clearing wrong bits so RX filter was not
disabled in RX filter configuration.
MFC r277048:
Enable receive filter in sis_rxfilter().
While I'm here add a check for driver running state for multicast
filter handling.
Allow the kern.osrelease and kern.osreldate sysctl values to be set in a
jail's creation parameters. This allows the kernel version to be reliably
spoofed within the jail whether examined directly with sysctl or
indirectly with the uname -r and -K options.
Export the new osreldate and osrelease jail parms in jail_get(2).
Fix line wrap.
sfxge: compile out LRO if kernel is compiled without IPv4 and IPv6
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
MFC: 279411
Unbreak 'make depend' with sfxge by removing debugging code activated in the
INET || INET6 case
X-MFC with: r279398
Pointyhat to: arybchik
sfxge: remove unnecessary and wrong prediction
Sponsored by: Solarflare Communications, Inc.
Original Differential Revision: https://reviews.freebsd.org/D2085
sfxge: do not check MCDI status word
This is a temporary workaround until we determine a reliable sequence
of operations for detecting MC reboots.
Sponsored by: Solarflare Communications, Inc.
Original Differential Revision: https://reviews.freebsd.org/D2084
sfxge: FreeBSD before 10 does not have bus_space_*_8 on amd64
bus_space_*_8() are not always macros, so it is not correct to use
#ifndef.
Sponsored by: Solarflare Communications, Inc.
Original Differential Revision: https://reviews.freebsd.org/D2083
sfxge: add statistics for each Tx queue
Sponsored by: Solarflare Communications, Inc.
Original Differential Revision: https://reviews.freebsd.org/D2082
sfxge: remove obsolete Tx non-multi queue support
Tx multi queue is added in FreeBSD 8.0. So, the changeset drops earlier
versions support.
Sponsored by: Solarflare Communications, Inc.
Original Differential Revision: https://reviews.freebsd.org/D2081
sfxge: add barriers to BAR write macros
In theory the barriers are required to cope with write combining and
reordering. Two barriers are added (sometimes merged to one):
1. Before the first write to guarantee that previous writes to the region
have been done
2. Before the last write to guarantee that write to the last dword/qword is
done after previous writes
Barriers are inserted before in the assumption that it is better to
postpone barriers as much as it is possible (more chances that the
operation has already been already done and barrier does not stall CPU).
On x86 and amd64 bus space write barriers are just compiler memory barriers
which are definitely required.
Sponsored by: Solarflare Communications, Inc.
Original Differential Revision: https://reviews.freebsd.org/D2077
sfxge: assert either kernel or internal copy of interface flags
ioctl to put interface down sets ifp->if_flags which holds the intended
administratively defined state and calls driver callback to apply it.
When everything is done, driver updates internal copy of
interface flags sc->if_flags which holds the operational state.
So, transmit from Rx path is possible when interface is intended to be
administratively down in accordance with ifp->if_flags, but not applied
yet and the operational state is up in accordance with sc->if_flags.
Sponsored by: Solarflare Communications, Inc.
Original Differential Revision: https://reviews.freebsd.org/D2075
sfxge: increase default put-list limit to 1024
Drops are observed under multi-stream TCP traffic due to put-list
overflow with limit equal to 64.
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
sfxge: prefetch txq->common if TxQ is started only
Transmit may be called when TxQ is not started yet (i.e. txq->common is
invalid). TxQ state is checked below when mbuf is processed and dropped
if TxQ is not started.
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
sfxge: adding version info to device description
The information is required for NIC update and config tools.
Submitted by: Artem V. Andreev <Artem.Andreev at oktetlabs.ru>
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
sfxge: move deferred packet list statistics to dedicated node
It is done to structure sysctl and do not mix with Tx queue statistics
to be added.
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor)
