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2 HNS3 Performance Monitoring Unit (PMU)
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5 HNS3(HiSilicon network system 3) Performance Monitoring Unit (PMU) is an
6 End Point device to collect performance statistics of HiSilicon SoC NIC.
7 On Hip09, each SICL(Super I/O cluster) has one PMU device.
9 HNS3 PMU supports collection of performance statistics such as bandwidth,
10 latency, packet rate and interrupt rate.
12 Each HNS3 PMU supports 8 hardware events.
17 The HNS3 PMU driver registers a perf PMU with the name of its sicl id.::
19 /sys/devices/hns3_pmu_sicl_<sicl_id>
21 PMU driver provides description of available events, filter modes, format,
22 identifier and cpumask in sysfs.
24 The "events" directory describes the event code of all supported events
27 The "filtermode" directory describes the supported filter modes of each
30 The "format" directory describes all formats of the config (events) and
31 config1 (filter options) fields of the perf_event_attr structure.
33 The "identifier" file shows version of PMU hardware device.
35 The "bdf_min" and "bdf_max" files show the supported bdf range of each
38 The "hw_clk_freq" file shows the hardware clock frequency of each pmu
41 Example usage of checking event code and subevent code::
43 $# cat /sys/devices/hns3_pmu_sicl_0/events/dly_tx_normal_to_mac_time
45 $# cat /sys/devices/hns3_pmu_sicl_0/events/dly_tx_normal_to_mac_packet_num
48 Each performance statistic has a pair of events to get two values to
49 calculate real performance data in userspace.
51 The bits 0~15 of config (here 0x0204) are the true hardware event code. If
52 two events have same value of bits 0~15 of config, that means they are
53 event pair. And the bit 16 of config indicates getting counter 0 or
54 counter 1 of hardware event.
56 After getting two values of event pair in usersapce, the formula of
57 computation to calculate real performance data is:::
61 Example usage of checking supported filter mode::
63 $# cat /sys/devices/hns3_pmu_sicl_0/filtermode/bw_ssu_rpu_byte_num
64 filter mode supported: global/port/port-tc/func/func-queue/
66 Example usage of perf::
69 hns3_pmu_sicl_0/bw_ssu_rpu_byte_num/ [kernel PMU event]
70 hns3_pmu_sicl_0/bw_ssu_rpu_time/ [kernel PMU event]
71 ------------------------------------------
73 $# perf stat -g -e hns3_pmu_sicl_0/bw_ssu_rpu_byte_num,global=1/ -e hns3_pmu_sicl_0/bw_ssu_rpu_time,global=1/ -I 1000
75 $# perf stat -g -e hns3_pmu_sicl_0/config=0x00002,global=1/ -e hns3_pmu_sicl_0/config=0x10002,global=1/ -I 1000
82 PMU collect performance statistics for all HNS3 PCIe functions of IO DIE.
83 Set the "global" filter option to 1 will enable this mode.
84 Example usage of perf::
86 $# perf stat -a -e hns3_pmu_sicl_0/config=0x1020F,global=1/ -I 1000
89 PMU collect performance statistic of one whole physical port. The port id
90 is same as mac id. The "tc" filter option must be set to 0xF in this mode,
91 here tc stands for traffic class.
93 Example usage of perf::
95 $# perf stat -a -e hns3_pmu_sicl_0/config=0x1020F,port=0,tc=0xF/ -I 1000
98 PMU collect performance statistic of one tc of physical port. The port id
99 is same as mac id. The "tc" filter option must be set to 0 ~ 7 in this
101 Example usage of perf::
103 $# perf stat -a -e hns3_pmu_sicl_0/config=0x1020F,port=0,tc=0/ -I 1000
106 PMU collect performance statistic of one PF/VF. The function id is BDF of
107 PF/VF, its conversion formula::
109 func = (bus << 8) + (device << 3) + (function)
117 In this mode, the "queue" filter option must be set to 0xFFFF.
118 Example usage of perf::
120 $# perf stat -a -e hns3_pmu_sicl_0/config=0x1020F,bdf=0x3500,queue=0xFFFF/ -I 1000
123 PMU collect performance statistic of one queue of PF/VF. The function id
124 is BDF of PF/VF, the "queue" filter option must be set to the exact queue
126 Example usage of perf::
128 $# perf stat -a -e hns3_pmu_sicl_0/config=0x1020F,bdf=0x3500,queue=0/ -I 1000
131 PMU collect performance statistic of one interrupt of PF/VF. The function
132 id is BDF of PF/VF, the "intr" filter option must be set to the exact
133 interrupt id of function.
134 Example usage of perf::
136 $# perf stat -a -e hns3_pmu_sicl_0/config=0x00301,bdf=0x3500,intr=0/ -I 1000