MMU is disabled.
This expands some earlier logic and avoids a number of potential problems:
1. The CPU may not be able to access the framebuffer in real mode (real
mode does not necessarily encompass all available memory, especially
under a hypervisor).
2. Real mode accesses generally assume cacheability, so it might not
even have worked.
3. The difference in cacheability between real mode and later (and
potentially earlier) points in the boot with the MMU on may cause
ERAT parity problems, resulting in a machine check.
This fixes real-mode (usefdt=1) early boot on the G5 iMac, which was
previously broken as a result of issue #3. Late boot will require some
other fixups.
muge was committed to the tree in r333713 but not yet connected to the
tree, and it crossed paths with the migration to using ck.
Sponsored by: The FreeBSD Foundation
If a socket is closed or shutdown and a partial record (or what
appears to be a partial record) is waiting in the socket buffer,
discard the partial record and close the connection rather than
waiting forever for the rest of the record.
Reported by: Harsh Jain @ Chelsio
Sponsored by: Chelsio Communications
There are risks associated with waiting on a preemptible epoch section.
Change the name to make them not be the default and document the issue
under CAVEATS.
Reported by: markj
Microchip provided a permissively-licensed lan78xx header, which has
an 'ETH_' prefix on most definitions. Follow suit in our driver.
Sponsored by: The FreeBSD Foundation
An etid (ethoffload tid) is allocated for a send tag and it acquires a
reference on the traffic class that matches the send parameters
associated with the tag.
Sponsored by: Chelsio Communications
In UTF-8 locales mandoc uses a number of characters outside of the Basic
Latin group, e.g. from general punctuation or miscellaneous mathematical
symbols, and these rendered as ? in text mode.
This change adds (char, replacement, code point, description):
¦ | U+00A6 Broken bar
✓ √ U+2713 Checkmark
Sponsored by: The FreeBSD Foundation
storage, CDC ACM (serial), and CDC ECM (ethernet) at the same time.
It's quite similar in function to Linux' "g_multi" gadget.
Reviewed by: hselasky@
MFC after: 2 weeks
Relnotes: yes
Sponsored by: The FreeBSD Foundation
one character too many. Note that this function is only used to decode
string descriptors generated by the kernel itself.
Reviewed by: hselasky@
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
This driver was merged to HEAD one week prior to Exar publicly announcing they
had left the Ethernet market. It is not known to be used and has various code
quality issues spotted by Brooks and Hiren. Retire it in preparation for
FreeBSD 12.0.
Submitted by: kbowling
Reviewed by: brooks imp
Relnotes: yes
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D15442
This driver supports two Microchip USB-Ethernet controllers:
LAN7800 USB 3.1 to 10/100/1000 Mbps Ethernet
LAN7515 USB 2 to 10/100/1000 Mbps Ethernet with built-in USB hub
The LAN7515 is the Ethernet controller on the Raspberry Pi 3B+.
At present there is no datasheet for the LAN7515, but it is effectively
a USB 2 hub combined with a LAN7800 controller. A comprehensive LAN7800
datasheet is at http://www.microchip.com/wwwproducts/en/LAN7800.
This driver is based on the structure of the smsc(4) driver which
supports Microchip/SMSC's LAN95xx family. (Microchip acquired SMSC
in May 2012.) The Linux lan78xx driver served as a reference for some
functionality and registers.
The 'muge' driver name comes from "Microchip USB Gigabit Ethernet".
I made some style adjustments and minor edits to Arshan's submission.
It will be connected to the build after additional review and testing.
Thanks to Microchip for providing a number of Evaluation Boards (EVBs)
for development and testing.
Submitted by: Arshan Khanifar
Reviewed by: hselasky (earlier)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D15168
provisioned for NIC_ETHOFLD and the kernel has option RATELIMIT.
It is possible to use the chip's offload queues for normal NIC Tx and
not just TOE Tx. The difference is that these queues support out of
order processing of work requests and have a per-"flowid" mechanism for
tracking credits between the driver and hardware. This allows Tx for
any number of flows bound to different rate limits to be submitted to a
single Tx queue and the work requests for slow flows won't cause HOL
blocking for the rest.
Sponsored by: Chelsio Communications
by default.
This is the first of a series of commits that will add support for
RATELIMIT kernel option to the base if_cxgbe driver, for use with
ordinary NIC traffic "flows". RATELIMIT is already supported by t4_tom
for the fully-offloaded TCP connections that it handles.
Sponsored by: Chelsio Communications
This implements per-thread counters for PMC sampling. The thread
descriptors are stored in a list attached to the process descriptor.
These thread descriptors can store any per-thread information necessary
for current or future features. For the moment, they just store the counters
for sampling.
The thread descriptors are created when the process descriptor is created.
Additionally, thread descriptors are created or freed when threads
are started or stopped. Because the thread exit function is called in a
critical section, we can't directly free the thread descriptors. Hence,
they are freed to a cache, which is also used as a source of allocations
when needed for new threads.
Approved by: sbruno
Obtained from: jtl
Sponsored by: Juniper Networks, Limelight Networks
Differential Revision: https://reviews.freebsd.org/D15335
if an error is reported while pre-processing the configuration file that
the driver attempted to use.
Also, allow the user to explicitly use the built-in configuration with
hw.cxgbe.config_file="built-in"
MFC after: 2 days
Sponsored by: Chelsio Communications
There is no need to try to resume it after each smaller operations
(putchar, cursor_position, copy, fill).
The resume function already checks if the timer is armed before doing
anything, but it uses an atomic cmpset which is expensive. And resuming
the timer at the end of input processing is enough.
While here, we also skip timer resume if the input is for another
windows than the currently displayed one. I.e. if `ttyv0` is currently
displayed, any changes to `ttyv1` shouldn't resume the timer (which
would refresh `ttyv0`).
By doing the same benchmark as r333669, I get:
* vt(4), before r333669: 1500 ms
* vt(4), with this patch: 760 ms
* syscons(4): 700 ms
... to process input, instead of inside each smaller operations such as
appending a character or moving the cursor forward.
In other words, before we were doing (oversimplified):
teken_input()
<for each input character>
vtterm_putchar()
VTBUF_LOCK()
VTBUF_UNLOCK()
vtterm_cursor_position()
VTBUF_LOCK()
VTBUF_UNLOCK()
Now, we are doing:
vtterm_pre_input()
VTBUF_LOCK()
teken_input()
<for each input character>
vtterm_putchar()
vtterm_cursor_position()
vtterm_post_input()
VTBUF_UNLOCK()
The situation was even worse when the vtterm_copy() and vtterm_fill()
callbacks were involved.
The new callbacks are:
* struct terminal_class->tc_pre_input()
* struct terminal_class->tc_post_input()
They are called in teken_input(), surrounding the while() loop.
The goal is to improve input processing speed of vt(4). As a benchmark,
here is the time taken to write a text file of 360 000 lines (26 MiB) on
`ttyv0`:
* vt(4), unmodified: 1500 ms
* vt(4), with this patch: 1200 ms
* syscons(4): 700 ms
This is on a Haswell laptop with a GENERIC-NODEBUG kernel.
At the same time, the locking is changed in the vt_flush() function
which is responsible to draw the text on screen. So instead of
(indirectly) using VTBUF_LOCK() just to read and reset the dirty area
of the internal buffer, the lock is held for about the entire function,
including the drawing part.
The change is mostly visible while content is scrolling fast: before,
lines could appear garbled while scrolling because the internal buffer
was accessed without locks (once the scrolling was finished, the output
was correct). Now, the scrolling appears correct.
In the end, the locking model is closer to what syscons(4) does.
Differential Revision: https://reviews.freebsd.org/D15302
later devices. These caches work akin to the ones found in HDDs/SSDs
that ada(4)/da(4) also enable if existent, but likewise increase the
likelihood of data loss in case of a sudden power outage etc. On the
other hand, write performance is up to twice as high for e. g. 1 GiB
files depending on the actual chip and transfer mode employed.
For maximum data integrity, the usage of eMMC caches can be disabled
via the hw.mmcsd.cache tunable.
- Get rid of the NOP mmcsd_open().
I210 restore functionality if pxeboot rom is enabled on this device.
r333345 attempted to determine if this code was needed or it was some kind
of work around for a problem. Turns out, its definitely a work around for
hardware locking and synchronization that manifests itself if the option
Rom is enabled and is selected as a boot device (there was a PXE attempt).
Reviewed by: mmacy
Differential Revision: https://reviews.freebsd.org/D15439
- Driver support for hardware NAT.
- Driver support for swapmac action.
- Validate a request to create a hashfilter against the filter mask.
- Add a hashfilter config file for T5.
Sponsored by: Chelsio Communications
in the commit log of r321385 has been confirmed via the public VLI54
erratum. Thus, stop advertising DDR52 for these controllers.
Note that this change should hardly make a difference in practice as
eMMC chips from the same era as these SoCs most likely support HS200
at least, probably even up to HS400ES.
Once a pmc owner is added to the pmc_ss_owners list it is
visible for all to see. We don't want this to happen until
setup is complete.
Reported by: mjg
Approved by: sbruno
- fix load/unload race by allocating the per-domain list structure at boot
- fix long extant vm map LOR by replacing pmc_sx sx_slock with global_epoch
to protect the liveness of elements of the pmc_ss_owners list
Reported by: pho
Approved by: sbruno
It appears that domain information is set correctly independent
of whether or not NUMA is defined. However, there is no memory
backing secondary domains leading to allocation failure.
Reported by: pho@, np@
Approved by: sbruno@
On non-trivial SMP systems the contention on the pmc_owner mutex leads
to a substantial number of samples captured being from the pmc process
itself. This change a) makes buffers larger to avoid contention on the
global list b) makes the working sample buffer per cpu.
Run pmcstat in the background (default event rate of 64k):
pmcstat -S UNHALTED_CORE_CYCLES -O /dev/null sleep 600 &
Before:
make -j96 buildkernel -s >&/dev/null 3336.68s user 24684.10s system 7442% cpu 6:16.50 total
After:
make -j96 buildkernel -s >&/dev/null 2697.82s user 1347.35s system 6058% cpu 1:06.77 total
For more realistic overhead measurement set the sample rate for ~2khz
on a 2.1Ghz processor:
pmcstat -n 1050000 -S UNHALTED_CORE_CYCLES -O /dev/null sleep 6000 &
Collecting 10 samples of `make -j96 buildkernel` from each:
x before
+ after
real time:
N Min Max Median Avg Stddev
x 10 76.4 127.62 84.845 88.577 15.100031
+ 10 59.71 60.79 60.135 60.179 0.29957192
Difference at 95.0% confidence
-28.398 +/- 10.0344
-32.0602% +/- 7.69825%
(Student's t, pooled s = 10.6794)
system time:
N Min Max Median Avg Stddev
x 10 2277.96 6948.53 2949.47 3341.492 1385.2677
+ 10 1038.7 1081.06 1070.555 1064.017 15.85404
Difference at 95.0% confidence
-2277.47 +/- 920.425
-68.1574% +/- 8.77623%
(Student's t, pooled s = 979.596)
x no pmc
+ pmc running
real time:
HEAD:
N Min Max Median Avg Stddev
x 10 58.38 59.15 58.86 58.847 0.22504567
+ 10 76.4 127.62 84.845 88.577 15.100031
Difference at 95.0% confidence
29.73 +/- 10.0335
50.5208% +/- 17.0525%
(Student's t, pooled s = 10.6785)
patched:
N Min Max Median Avg Stddev
x 10 58.38 59.15 58.86 58.847 0.22504567
+ 10 59.71 60.79 60.135 60.179 0.29957192
Difference at 95.0% confidence
1.332 +/- 0.248939
2.2635% +/- 0.426506%
(Student's t, pooled s = 0.264942)
system time:
HEAD:
N Min Max Median Avg Stddev
x 10 1010.15 1073.31 1025.465 1031.524 18.135705
+ 10 2277.96 6948.53 2949.47 3341.492 1385.2677
Difference at 95.0% confidence
2309.97 +/- 920.443
223.937% +/- 89.3039%
(Student's t, pooled s = 979.616)
patched:
N Min Max Median Avg Stddev
x 10 1010.15 1073.31 1025.465 1031.524 18.135705
+ 10 1038.7 1081.06 1070.555 1064.017 15.85404
Difference at 95.0% confidence
32.493 +/- 16.0042
3.15% +/- 1.5794%
(Student's t, pooled s = 17.0331)
Reviewed by: jeff@
Approved by: sbruno@
Differential Revision: https://reviews.freebsd.org/D15155
