In one case generating callgraph output from a 24MB system-wide sampling
data file took 17.4 seconds on average. Profiling showed pmcstat
spending a lot of time in strcmp, due to hash collisions.
Replacing the XOR-only hash with FNV-1a reduces the run time for my
test by 40%.
With the new-and-improved vm_fault_copy_entry() (r265843), we can always
avoid soft page faults when adding write access to user wired entries in
vm_map_protect(). Previously, we only avoided the soft page fault when
the underlying pages were copy-on-write. In other words, we avoided the
pages faults that might sleep on page allocation, but not the trivial
page faults to update the physical map.
On a fork allow read-only wired pages to be copy-on-write shared between
the parent and child processes. Previously, we copied these pages even
though they are read only. However, the reason for copying them is
historical and no longer exists. In recent times, vm_map_protect() has
developed the ability to copy pages when write access is added to wired
copy-on-write pages. So, in this case, copy-on-write sharing of wired
pages is not to be feared. It is not going to lead to copy-on-write
faults on wired memory.
- Add preliminary support for the Realtek RTL8188EUS and RTL8188ETV chipsets.
- Add device ID for 'Sanoxy 802.11N' USB
- Initialize rssi variable.
- Fix gcc build, initialize off variable.
- The DELAY() should not be used in USB drivers.
- The usb_pause_mtx() function takes ticks and not milliseconds as last argument.
r265806, r265872, r266012 and r266394:
- Multiple DWC OTG host mode related fixes, improvements and optimisations.
- Add full support for ISOCHRONOUS transfers to the DWC OTG driver.
- Use the interrupt filter to handle basic USB FIFO interrupts.
- Fixed unbalanced unlock in case of "dwc_otg_init_fifo()" failure.
- Add common spinlock to the USB bus structure.
USB endpoints are almost always single-digits, fix the path in the man
page to be clearer.
PR: docs/175560
Submitted by: Andreas Gustafsson <gson gson.org>
Fix typo. Note that although this file is under contrib, it has diverged
sufficiently from upstream (including a full whitespace commit and large
portions rewritten) that this change does not move us further from the
upstream.
PR: docs/186608
Submitted by: Jamie Landeg-Jones <jamie@dyslexicfish.net>
------------------------------------------------------------------------
r265484 | ken | 2014-05-06 23:11:16 -0600 (Tue, 06 May 2014) | 5 lines
Remove some debugging code.
Submitted by: Steve McConnell <stephen.mcconnell@avagotech.com>
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r265485 | ken | 2014-05-06 23:14:48 -0600 (Tue, 06 May 2014) | 9 lines
Hold the SIM lock when calling xpt_create_path() and xpt_action() in
mprsas_SSU_to_SATA_devices().
This fixes an assertion on shutdown with INVARIANTS enabled with SATA
drives present on an IR firmware controller.
Reviewed by: Steve McConnell <stephen.mcconnell@avagotech.com>.
------------------------------------------------------------------------
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r265709 | ken | 2014-05-08 14:28:22 -0600 (Thu, 08 May 2014) | 15 lines
Fix TLR (Transport Layer Retry) support in the mps(4) and mpr(4) drivers.
TLR is necessary for reliable communication with SAS tape drives.
This was broken by change 246713 in the mps(4) driver. It changed the
cm_data field for SCSI I/O requests to point to the CCB instead of the data
buffer. So, instead, look at the CCB's data pointer to determine whether
or not we're talking to a tape drive.
Also, take the residual into account to make sure that we don't go off the
end of the request.
Sponsored by: Spectra Logic Corporation
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------------------------------------------------------------------------
r265712 | ken | 2014-05-08 14:46:46 -0600 (Thu, 08 May 2014) | 10 lines
Add #ifdefs in the mpr(4) driver so that versions of stable/9 that
have implemented the PIM_NOSCAN rescan functionality will have it
enabled.
This is a no-op for head.
Reviewed by: slm
Sponsored by: Spectra Logic Corporation
------------------------------------------------------------------------
Sponsored by: Spectra Logic, Avago
Slightly restructure the final loop in rman_reserve_resource_bound().
Replace with the existing loop termination test with a similar
condition from the nested "if" that may terminate the loop a bit
sooner, but still not too early. This condition can then be removed
from the nested "if". Relocate an operator to be style(9) compliant.
msync(2) must return ENOMEM and not EINVAL when the address is outside the
allowed range or when one or more pages are not mapped. This according to
The Open Group Base Specifications Issue 7.
Sponsored by: EMC / Isilon storage division
Fix a bug in the HPET emulation where a timer interrupt could be lost when the
guest disables the HPET.
The HPET timer interrupt is triggered from the callout handler associated with
the timer. It is possible for the callout handler to be delayed before it gets
a chance to execute. If the guest disables the HPET during this window then the
handler never gets a chance to execute and the timer interrupt is lost.
This is now fixed by injecting a timer interrupt into the guest if the callout
time is detected to be in the past when the HPET is disabled.
(NANO_CONFIG): New variable containing path of config file, so that
the configuration can reference additional files relative to its own
location.
(NANO_MODULES): If set to "default", install all built modules.
Reviewed by: imp
Fix the VCVT instruction. It must round towards zero when converting from
a floating-point to an integer value. This was not the case causing issues
when printing certain values.
- Fix a typo.
- Use bus_dmamap_unload(), it is not optional.
- The new allocator won't return coherent memory for any size > PAGE_SIZE,
so don't assume we have coherent memory, and explicitely use
bus_dmamap_sync().
- Don't claim the adapter is idle if it is clearing a drive.
- Fix an off by one error when checking for the stop event. This
resulted in not showing the most recent event by default.
- When the stop even is hit, break out of the outer loop to stop
fetching more events.
Fix a couple of issues with vcpu state:
- Add a parameter to 'vcpu_set_state()' to enforce that the vcpu is in the
IDLE state before the requested state transition. This guarantees that
there is exactly one ioctl() operating on a vcpu at any point in time and
prevents unintended state transitions.
- Fix a race between VMRUN() and vcpu_notify_event() due to 'vcpu->hostcpu'
being updated outside of the vcpu_lock().
Interrupts need to be disabled on entry to cpu_sleep() for ARM. Given
that and the need to be in a critical section when switching to idleclock
mode for event timers, use spinlock_enter()/exit() to achieve both needs.
Clean up some style nits.
Make the hardware memory and instruction barrier functions work on armv4
and armv5 as well.
Add cpu_l2cache_drain_writebuf(), use it to implement generic_bs_barrier().
Move the mptramp code which is specific to the Marvell ArmadaXP SoC out of
the common locore.S file and into the mv/armadaxp directory.
Consolidate all the AP core startup stuff under a single #ifdef SMP block
Call idcache_inv_all from the AP core entry code before turning on the MMU.
Also, enable instruction and branch caches, which should be safe now that
they're properly initialized/invalidated first.
Move the pl310.enabled tunable to hw.pl310.enabled. Clean up a few minor
style(9) nits. Use DEVMETHOD_END.
Break out the code that figures out the L2 cache geometry to its own
routine, so that it can be called from multiple places in upcoming changes.
Call platform_pl310_init() before enabling the controller, and handle the
case where the controller is already enabled.
Add defines for the bits in the PL310 debug control register.
Add a public routine to set the L2 cache ram latencies. This can be
called by platform init routines to fine-tune cache performance.
Enable PL310 power-saving modes and tune the cache ram latencies for imx6.
Add SMP support for Zedboard.
Use edge-triggered interrupts rather than polling loops to avoid missing
transitions of the INIT_B line. Also, release the mutex during uiomove().
Convert the Zynq SoC support to the new routines for static device mapping.
