In all tunable descriptions below, X represents the adapter number.
To disable MSI interrupts for all mpr driver instances, set this tunable value in loader.conf(5):
hw.mpr.disable_msi=1
To disable MSI interrupts for a specific mpr driver instance, set this tunable value in loader.conf(5):
dev.mpr.X.disable_msi=1
To disable MSI-X interrupts for all mpr driver instances, set this tunable value in loader.conf(5):
hw.mpr.disable_msix=1
To disable MSI-X interrupts for a specific mpr driver instance, set this tunable value in loader.conf(5):
dev.mpr.X.disable_msix=1
To set the maximum number of DMA chains allocated for all adapters, set this tunable in loader.conf(5):
hw.mpr.max_chains=NNNN
To set the maximum number of DMA chains allocated for a specific adapter, set this tunable in
loader.conf(5):
dev.mpr.X.max_chains=NNNN
The default max_chains value is 16384.
The current number of free chain frames is stored in the dev.mpr.X.chain_free sysctl(8) variable.
The lowest number of free chain frames seen since boot is stored in the dev.mpr.X.chain_free_lowwater
sysctl(8) variable.
The number of times that chain frame allocations have failed since boot is stored in the
dev.mpr.X.chain_alloc_fail sysctl(8) variable. This can be used to determine whether the max_chains
tunable should be increased to help performance.
The current number of active I/O commands is shown in the dev.mpr.X.io_cmds_active sysctl(8) variable.
The current number of free PRP pages is stored in the dev.mpr.X.prp_pages_free sysctl(8) variable. PRP
pages are used by NVMe devices for I/O transfers, much like Scatter/Gather lists.
The lowest number of free PRP pages seen since boot is stored in the dev.mpr.X.prp_pages_free_lowwater
sysctl(8) variable.
The number of times that PRP page allocations have failed since boot is stored in the
dev.mpr.X.prp_page_alloc_fail sysctl(8) variable.
To set the maximum number of pages that will be used per I/O for all adapters, set this tunable in
loader.conf(5):
hw.mpr.max_io_pages=NNNN
To set the maximum number of pages that will be used per I/O for a specific adapter, set this tunable in
loader.conf(5):
dev.mpr.X.max_io_pages=NNNN
The default max_io_pages value is -1, meaning that the maximum I/O size that will be used per I/O will be
calculated using the IOCFacts values stored in the controller. The lowest value that the driver will use
for max_io_pages is 1, otherwise IOCFacts will be used to calculate the maximum I/O size. The smaller
I/O size calculated from either max_io_pages or IOCFacts will be the maximum I/O size used by the driver.
The highest number of active I/O commands seen since boot is stored in the dev.mpr.X.io_cmds_highwater
sysctl(8) variable.
Devices can be excluded from mpr control for all adapters by setting this tunable in loader.conf(5):
hw.mpr.exclude_ids=Y
Y represents the target ID of the device. If more than one device is to be excluded, target IDs are
separated by commas.
Devices can be excluded from mpr control for a specific adapter by setting this tunable in
loader.conf(5):
dev.mpr.X.exclude_ids=Y
Y represents the target ID of the device. If more than one device is to be excluded, target IDs are
separated by commas.
The adapter can issue the StartStopUnit SCSI command to SATA direct-access devices during shutdown. This
allows the device to quiesce powering down. To control this feature for all adapters, set the
hw.mpr.enable_ssu
tunable in loader.conf(5) to one of these values:
0 Do not send SSU to either HDDs or SSDs.
1 Send SSU to SSDs, but not to HDDs. This is the default value.
2 Send SSU to HDDs, but not to SSDs.
3 Send SSU to both HDDs and SSDs.
To control this feature for a specific adapter, set this tunable value in loader.conf(5):
dev.mpr.X.enable_ssu
The same set of values are valid as when setting this tunable for all adapters.
SATA disks that take several seconds to spin up and fail the SATA Identify command might not be
discovered by the driver. This problem can sometimes be overcome by increasing the value of the spinup
wait time in loader.conf(5) with the
hw.mpr.spinup_wait_time=NNNN
tunable. NNNN represents the number of seconds to wait for SATA devices to spin up when the device fails
the initial SATA Identify command.
Spinup wait times can be set for specific adapters in loader.conf(5): with the
dev.mpr.X.spinup_wait_time=NNNN
tunable. NNNN is the number of seconds to wait for SATA devices to spin up when they fail the initial
SATA Identify command.
The driver can map devices discovered by the adapter so that target IDs corresponding to a specific
device persist across resets and reboots. In some cases it is possible for devices to lose their mapped
IDs due to unexpected behavior from certain hardware, such as some types of enclosures. To overcome this
problem, a tunable is provided that will force the driver to map devices using the Phy number associated
with the device. This feature is not recommended if the topology includes multiple enclosures/expanders.
If multiple enclosures/expanders are present in the topology, Phy numbers are repeated, causing all
devices at these Phy numbers except the first device to fail enumeration. To control this feature for
all adapters, set the
hw.mpr.use_phy_num
tunable in loader.conf(5) to one of these values:
-1 Only use Phy numbers to map devices and bypass the driver's mapping logic.
0 Never use Phy numbers to map devices.
1 Use Phy numbers to map devices, but only if the driver's mapping logic fails to map the
device that is being enumerated. This is the default value.
To control this feature for a specific adapter, set this tunable value in loader.conf(5):
dev.mpr.X.use_phy_num
The same set of values are valid as when setting this tunable for all adapters.
Install Now
PNG Icons
Emojis