116 lines
4.2 KiB
ReStructuredText
116 lines
4.2 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0-only
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================================================
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Fujitsu Uncore Performance Monitoring Unit (PMU)
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================================================
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This driver supports the Uncore MAC PMUs and the Uncore PCI PMUs found
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in Fujitsu chips.
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Each MAC PMU on these chips is exposed as a uncore perf PMU with device name
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mac_iod<iod>_mac<mac>_ch<ch>.
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And each PCI PMU on these chips is exposed as a uncore perf PMU with device name
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pci_iod<iod>_pci<pci>.
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The driver provides a description of its available events and configuration
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options in sysfs, see /sys/bus/event_sources/devices/mac_iod<iod>_mac<mac>_ch<ch>/
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and /sys/bus/event_sources/devices/pci_iod<iod>_pci<pci>/.
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This driver exports:
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- formats, used by perf user space and other tools to configure events
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- events, used by perf user space and other tools to create events
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symbolically, e.g.::
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perf stat -a -e mac_iod0_mac0_ch0/event=0x21/ ls
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perf stat -a -e pci_iod0_pci0/event=0x24/ ls
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- cpumask, used by perf user space and other tools to know on which CPUs
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to open the events
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This driver supports the following events for MAC:
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- cycles
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This event counts MAC cycles at MAC frequency.
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- read-count
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This event counts the number of read requests to MAC.
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- read-count-request
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This event counts the number of read requests including retry to MAC.
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- read-count-return
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This event counts the number of responses to read requests to MAC.
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- read-count-request-pftgt
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This event counts the number of read requests including retry with PFTGT
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flag.
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- read-count-request-normal
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This event counts the number of read requests including retry without PFTGT
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flag.
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- read-count-return-pftgt-hit
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This event counts the number of responses to read requests which hit the
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PFTGT buffer.
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- read-count-return-pftgt-miss
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This event counts the number of responses to read requests which miss the
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PFTGT buffer.
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- read-wait
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This event counts outstanding read requests issued by DDR memory controller
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per cycle.
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- write-count
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This event counts the number of write requests to MAC (including zero write,
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full write, partial write, write cancel).
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- write-count-write
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This event counts the number of full write requests to MAC (not including
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zero write).
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- write-count-pwrite
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This event counts the number of partial write requests to MAC.
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- memory-read-count
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This event counts the number of read requests from MAC to memory.
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- memory-write-count
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This event counts the number of full write requests from MAC to memory.
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- memory-pwrite-count
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This event counts the number of partial write requests from MAC to memory.
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- ea-mac
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This event counts energy consumption of MAC.
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- ea-memory
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This event counts energy consumption of memory.
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- ea-memory-mac-write
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This event counts the number of write requests from MAC to memory.
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- ea-ha
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This event counts energy consumption of HA.
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'ea' is the abbreviation for 'Energy Analyzer'.
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Examples for use with perf::
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perf stat -e mac_iod0_mac0_ch0/ea-mac/ ls
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And, this driver supports the following events for PCI:
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- pci-port0-cycles
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This event counts PCI cycles at PCI frequency in port0.
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- pci-port0-read-count
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This event counts read transactions for data transfer in port0.
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- pci-port0-read-count-bus
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This event counts read transactions for bus usage in port0.
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- pci-port0-write-count
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This event counts write transactions for data transfer in port0.
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- pci-port0-write-count-bus
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This event counts write transactions for bus usage in port0.
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- pci-port1-cycles
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This event counts PCI cycles at PCI frequency in port1.
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- pci-port1-read-count
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This event counts read transactions for data transfer in port1.
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- pci-port1-read-count-bus
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This event counts read transactions for bus usage in port1.
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- pci-port1-write-count
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This event counts write transactions for data transfer in port1.
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- pci-port1-write-count-bus
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This event counts write transactions for bus usage in port1.
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- ea-pci
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This event counts energy consumption of PCI.
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'ea' is the abbreviation for 'Energy Analyzer'.
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Examples for use with perf::
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perf stat -e pci_iod0_pci0/ea-pci/ ls
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Given that these are uncore PMUs the driver does not support sampling, therefore
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"perf record" will not work. Per-task perf sessions are not supported.
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