Re: [PATCH V3] perf vendor events riscv: add T-HEAD C9xx JSON file
From: Nikita Shubin
Date: Tue Jun 27 2023 - 05:01:25 EST
On Tue, 2023-06-27 at 01:40 -0700, Atish Patra wrote:
> On Thu, May 18, 2023 at 2:09 AM Nikita Shubin
> <nikita.shubin@xxxxxxxxxxx> wrote:
> >
> > Hello Inochi Amaoto!
> >
> > Tested your latest patch on LicheeRV C906:
> >
> > linux $ git describe --tags
> > v6.4-rc2-1-g85a420ada3a8
> >
> > opensbi $ git describe --tags
> > v1.2-119-gdc1c7db
> >
> > stat_all_pmu.sh - PASSED
> >
> > Perf stat gives something:
> >
> > perf stat -e
> > data_tlb_miss,inst_tlb_miss,jtlb_miss,l1_dcache_read_acc
> > ess,l1_dcache_read_miss,l1_dcache_write_access,l1_dcache_write_miss
> > ,l1_
> > icache_ac
> > cess,l1_icache_miss -- sleep 1
> >
> > Performance counter stats for 'sleep 1':
> >
> > 9082 data_tlb_miss
> > 5604 inst_tlb_miss
> > 1790 jtlb_miss
> > 130207 l1_dcache_read_access
> > 3353 l1_dcache_read_miss
> > 80454 l1_dcache_write_access
> > 633 l1_dcache_write_miss
> > 639820 l1_icache_access
> > 14660 l1_icache_miss
> >
> > 1.009768750 seconds time elapsed
> >
> > 0.000000000 seconds user
> > 0.010388000 seconds sys
> >
> > perf record hangs
> >
> > licheerv # perf record
> > [ 432.015618] watchdog: BUG: soft lockup - CPU#0 stuck for 26s!
> > [perf:117]
> > [ 460.015617] watchdog: BUG: soft lockup - CPU#0 stuck for 52s!
> > [perf:117]
> > [ 488.015616] watchdog: BUG: soft lockup - CPU#0 stuck for 78s!
> > [perf:117]
> > [ 516.015617] watchdog: BUG: soft lockup - CPU#0 stuck for 104s!
> > [perf:117]
> >
>
> Is it related to perf record or just random soft lockups you keep
> getting on this board ?
Clearly related to perf record (at least perf record triggers it),
didn't had time for deep investigation through. Was planning too look
into it in a week or so.
>
> > But that's not related to your patch anyway.
> >
> > I am strongly against using "c9xx" wildcard, i would prefer
> > declaring
> > them separate (especially taking in mind that c920 is c910 with
> > vector
> > - AFAIK), but that's up to Arnaldo to decide.
> >
> > Anyway:
> >
> > Tested-by: Nikita Shubin <n.shubin@xxxxxxxxx>
> >
> >
> > On Wed, 2023-05-17 at 15:12 +0800, Inochi Amaoto wrote:
> > > Add json file of T-HEAD C9xx series events.
> > >
> > > The event idx (raw value) is summary as following:
> > >
> > > event id range | support cpu
> > > 0x01 - 0x06 | c906,c910,c920
> > > 0x07 | c906
> > > 0x08 - 0x0a | c910,c920
> > > 0x0b - 0x0f | c906,c910,c920
> > > 0x10 - 0x1a | c910,c920
> > > 0x1b - 0x1c | c910,c920 (software defined for all >= 0x1b)
> > > 0x1d - 0x2a | c906
> > >
> > > The event ids are based on the public document of T-HEAD and
> > > cover
> > > the c9xx series.
> > >
> > > These events are the max that c9xx series support.
> > > Since T-HEAD let manufacturers decide whether events are usable,
> > > the final support of the perf events is determined by the pmu
> > > node
> > > of the soc dtb.
> > >
> > > Signed-off-by: Inochi Amaoto <inochiama@xxxxxxxxxxx>
> > > ---
> > > Change from v2:
> > > 1. add C906 0x07 events to the instruction.json file
> > > 2. fix name for events 0x07 and 0x09 in instruction.json
> > >
> > > Example:
> > >
> > > This pmu node example can be used on sophgo sg2042 platform
> > > (c920)
> > > with
> > > mainline OpenSBI.
> > > It should also work on T-HEAD th1520.
> > >
> > > For the one use C906 core. Only event 0x01 - 0x07, 0xb - 0xf has
> > > known
> > > CSR mapping. The other events do not have known CSR mapping in
> > > document
> > > until now.
> > > This pmu node needs to be shorten to adopt c906
> > >
> > > pmu {
> > > compatible = "riscv,pmu";
> > > riscv,event-to-mhpmcounters =
> > > // event-start event-end a bitmap of all the
> > > MHPMCOUNTERx
> > > <0x00006 0x00006 0x00000400>,
> > > <0x00005 0x00005 0x00000800>,
> > > <0x10000 0x10000 0x00004000>,
> > > <0x10001 0x10001 0x00008000>,
> > > <0x10002 0x10002 0x00010000>,
> > > <0x10003 0x10003 0x00020000>,
> > > <0x10008 0x10008 0x00000008>,
> > > <0x10009 0x10009 0x00000010>,
> > > <0x10010 0x10010 0x00040000>,
> > > <0x10011 0x10011 0x00080000>,
> > > <0x10012 0x10012 0x00100000>,
> > > <0x10013 0x10013 0x00200000>,
> > > <0x10019 0x10019 0x00000040>,
> > > <0x10021 0x10021 0x00000020>;
> > > riscv,event-to-mhpmevent =
> > > // event-id event-selector
> > > /* mhpmevent3: L1I_READ_ACCESS */
> > > <0x10008 0x00000000 0x00000001>,
> > > /* mhpmevent4: L1I_READ_MISS */
> > > <0x10009 0x00000000 0x00000002>,
> > > /* mhpmevent5: ITLB_READ_MISS */
> > > <0x10021 0x00000000 0x00000003>,
> > > /* mhpmevent6: DTLB_READ_MISS */
> > > <0x10019 0x00000000 0x00000004>,
> > > /* mhpmevent10: PMU_HW_BRANCH_MISSES */
> > > <0x00006 0x00000000 0x00000008>,
> > > /* mhpmevent11: PMU_HW_BRANCH_INSTRUCTIONS */
> > > <0x00005 0x00000000 0x00000009>,
> > > /* mhpmevent14: L1D_READ_ACCESS */
> > > <0x10000 0x00000000 0x0000000c>,
> > > /* mhpmevent15: L1D_READ_MISS */
> > > <0x10001 0x00000000 0x0000000d>,
> > > /* mhpmevent16: L1D_WRITE_ACCESS */
> > > <0x10002 0x00000000 0x0000000e>,
> > > /* mhpmevent17: L1D_WRITE_MISS */
> > > <0x10003 0x00000000 0x0000000f>,
> > > /* mhpmevent18: LL_READ_ACCESS */
> > > <0x10010 0x00000000 0x00000010>,
> > > /* mhpmevent19: LL_READ_MISS */
> > > <0x10011 0x00000000 0x00000011>,
> > > /* mhpmevent20: LL_WRITE_ACCESS */
> > > <0x10012 0x00000000 0x00000012>,
> > > /* mhpmevent21: LL_WRITE_MISS */
> > > <0x10013 0x00000000 0x00000013>;
> > > riscv,raw-event-to-mhpmcounters =
> > > /* mhpmevent3: L1 ICache Access Counter */
> > > <0x00000000 0x00000001 0xffffffff 0xffffffff
> > > 0x00000008>,
> > > /* mhpmevent4: L1 ICache Miss Counter */
> > > <0x00000000 0x00000002 0xffffffff 0xffffffff
> > > 0x00000010>,
> > > /* mhpmevent5: I-UTLB Miss Counter */
> > > <0x00000000 0x00000003 0xffffffff 0xffffffff
> > > 0x00000020>,
> > > /* mhpmevent6: D-UTLB Miss Counter */
> > > <0x00000000 0x00000004 0xffffffff 0xffffffff
> > > 0x00000040>,
> > > /* mhpmevent7: JTLB Miss */
> > > <0x00000000 0x00000005 0xffffffff 0xffffffff
> > > 0x00000080>,
> > > /* mhpmevent8: Conditional Branch Mispredict */
> > > <0x00000000 0x00000006 0xffffffff 0xffffffff
> > > 0x00000100>,
> > > /* mhpmevent9: Conditional Branch Instruction
> > > Counter
> > > (reserved for c910)*/
> > > /* <0x00000000 0x00000007 0xffffffff 0xffffffff
> > > 0x00000200>, */
> > > /* mhpmevent10: Indirect Branch Mispredict
> > > Counter */
> > > <0x00000000 0x00000008 0xffffffff 0xffffffff
> > > 0x00000400>,
> > > /* mhpmevent11: Indirect Branch Instruction
> > > Counter
> > > */
> > > <0x00000000 0x00000009 0xffffffff 0xffffffff
> > > 0x00000800>,
> > > /* mhpmevent12: LSU Spec Fail */
> > > <0x00000000 0x0000000a 0xffffffff 0xffffffff
> > > 0x00001000>,
> > > /* mhpmevent13: Store Instruction */
> > > <0x00000000 0x0000000b 0xffffffff 0xffffffff
> > > 0x00002000>,
> > > /* mhpmevent14: L1 DCache read access Counter */
> > > <0x00000000 0x0000000c 0xffffffff 0xffffffff
> > > 0x00004000>,
> > > /* mhpmevent15: L1 DCache read miss Counter */
> > > <0x00000000 0x0000000d 0xffffffff 0xffffffff
> > > 0x00008000>,
> > > /* mhpmevent16: L1 DCache write access Counter */
> > > <0x00000000 0x0000000e 0xffffffff 0xffffffff
> > > 0x00010000>,
> > > /* mhpmevent17: L1 DCache write access Counter */
> > > <0x00000000 0x0000000f 0xffffffff 0xffffffff
> > > 0x00020000>,
> > > /* mhpmevent18: L2 Cache read access Counter */
> > > <0x00000000 0x00000010 0xffffffff 0xffffffff
> > > 0x00040000>,
> > > /* mhpmevent19: L2 Cache read miss Counter */
> > > <0x00000000 0x00000011 0xffffffff 0xffffffff
> > > 0x00080000>,
> > > /* mhpmevent20: L2 Cache write access Counter */
> > > <0x00000000 0x00000012 0xffffffff 0xffffffff
> > > 0x00100000>,
> > > /* mhpmevent21: L2 Cache write miss Counter */
> > > <0x00000000 0x00000013 0xffffffff 0xffffffff
> > > 0x00200000>,
> > > /* mhpmevent22: RF Launch Fail */
> > > <0x00000000 0x00000014 0xffffffff 0xffffffff
> > > 0x00400000>,
> > > /* mhpmevent23: RF Reg Launch Fail */
> > > <0x00000000 0x00000015 0xffffffff 0xffffffff
> > > 0x00800000>,
> > > /* mhpmevent24: RF Instruction */
> > > <0x00000000 0x00000016 0xffffffff 0xffffffff
> > > 0x01000000>,
> > > /* mhpmevent25: LSU Cross 4K Stall */
> > > <0x00000000 0x00000017 0xffffffff 0xffffffff
> > > 0x02000000>,
> > > /* mhpmevent26: LSU Other Stall */
> > > <0x00000000 0x00000018 0xffffffff 0xffffffff
> > > 0x04000000>,
> > > /* mhpmevent27: LSU SQ Discard */
> > > <0x00000000 0x00000019 0xffffffff 0xffffffff
> > > 0x08000000>,
> > > /* mhpmevent28: LSU SQ Data Discard */
> > > <0x00000000 0x0000001a 0xffffffff 0xffffffff
> > > 0x10000000>;
> > > };
> > >
> > > ---
> > > tools/perf/pmu-events/arch/riscv/mapfile.csv | 1 +
> > > .../arch/riscv/t-head/c9xx/cache.json | 67
> > > +++++++++++++++++
> > > .../arch/riscv/t-head/c9xx/firmware.json | 68
> > > ++++++++++++++++++
> > > .../arch/riscv/t-head/c9xx/instruction.json | 72
> > > +++++++++++++++++++
> > > .../arch/riscv/t-head/c9xx/microarch.json | 67
> > > +++++++++++++++++
> > > 5 files changed, 275 insertions(+)
> > > create mode 100644 tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/cache.json
> > > create mode 100644 tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/firmware.json
> > > create mode 100644 tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/instruction.json
> > > create mode 100644 tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/microarch.json
> > >
> > > diff --git a/tools/perf/pmu-events/arch/riscv/mapfile.csv
> > > b/tools/perf/pmu-events/arch/riscv/mapfile.csv
> > > index c61b3d6ef616..dd1d998a7ad6 100644
> > > --- a/tools/perf/pmu-events/arch/riscv/mapfile.csv
> > > +++ b/tools/perf/pmu-events/arch/riscv/mapfile.csv
> > > @@ -15,3 +15,4 @@
> > > #
> > > #MVENDORID-MARCHID-MIMPID,Version,Filename,EventType
> > > 0x489-0x8000000000000007-0x[[:xdigit:]]+,v1,sifive/u74,core
> > > +0x5b7-0x0-0x0,v1,t-head/c9xx,core
> > > diff --git a/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/cache.json
> > > b/tools/perf/pmu-events/arch/riscv/t-head/c9xx/cache.json
> > > new file mode 100644
> > > index 000000000000..2c6e9a904a11
> > > --- /dev/null
> > > +++ b/tools/perf/pmu-events/arch/riscv/t-head/c9xx/cache.json
> > > @@ -0,0 +1,67 @@
> > > +[
> > > + {
> > > + "EventName": "L1_ICACHE_ACCESS",
> > > + "EventCode": "0x000001",
> > > + "BriefDescription": "L1 instruction cache access"
> > > + },
> > > + {
> > > + "EventName": "L1_ICACHE_MISS",
> > > + "EventCode": "0x000002",
> > > + "BriefDescription": "L1 instruction cache miss"
> > > + },
> > > + {
> > > + "EventName": "INST_TLB_MISS",
> > > + "EventCode": "0x000003",
> > > + "BriefDescription": "Instruction TLB (I-UTLB) miss"
> > > + },
> > > + {
> > > + "EventName": "DATA_TLB_MISS",
> > > + "EventCode": "0x000004",
> > > + "BriefDescription": "Data TLB (D-UTLB) miss"
> > > + },
> > > + {
> > > + "EventName": "JTLB_MISS",
> > > + "EventCode": "0x000005",
> > > + "BriefDescription": "JTLB access miss"
> > > + },
> > > + {
> > > + "EventName": "L1_DCACHE_READ_ACCESS",
> > > + "EventCode": "0x00000c",
> > > + "BriefDescription": "L1 data cache read access"
> > > + },
> > > + {
> > > + "EventName": "L1_DCACHE_READ_MISS",
> > > + "EventCode": "0x00000d",
> > > + "BriefDescription": "L1 data cache read miss"
> > > + },
> > > + {
> > > + "EventName": "L1_DCACHE_WRITE_ACCESS",
> > > + "EventCode": "0x00000e",
> > > + "BriefDescription": "L1 data cache write access"
> > > + },
> > > + {
> > > + "EventName": "L1_DCACHE_WRITE_MISS",
> > > + "EventCode": "0x00000f",
> > > + "BriefDescription": "L1 data cache write miss"
> > > + },
> > > + {
> > > + "EventName": "L2_CACHE_READ_ACCESS",
> > > + "EventCode": "0x000010",
> > > + "BriefDescription": "L2 cache read access"
> > > + },
> > > + {
> > > + "EventName": "L2_CACHE_READ_MISS",
> > > + "EventCode": "0x000011",
> > > + "BriefDescription": "L2 cache read miss"
> > > + },
> > > + {
> > > + "EventName": "L2_CACHE_WRITE_ACCESS",
> > > + "EventCode": "0x000012",
> > > + "BriefDescription": "L2 cache write access"
> > > + },
> > > + {
> > > + "EventName": "L2_CACHE_WRITE_MISS",
> > > + "EventCode": "0x000013",
> > > + "BriefDescription": "L2 cache write miss"
> > > + }
> > > +]
> > > diff --git a/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/firmware.json b/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/firmware.json
> > > new file mode 100644
> > > index 000000000000..9b4a032186a7
> > > --- /dev/null
> > > +++ b/tools/perf/pmu-events/arch/riscv/t-head/c9xx/firmware.json
> > > @@ -0,0 +1,68 @@
> > > +[
> > > + {
> > > + "ArchStdEvent": "FW_MISALIGNED_LOAD"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_MISALIGNED_STORE"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_ACCESS_LOAD"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_ACCESS_STORE"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_ILLEGAL_INSN"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_SET_TIMER"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_IPI_SENT"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_IPI_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_FENCE_I_SENT"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_FENCE_I_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_SFENCE_VMA_SENT"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_SFENCE_VMA_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_SFENCE_VMA_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_SFENCE_VMA_ASID_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_GVMA_SENT"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_GVMA_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_GVMA_VMID_SENT"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_GVMA_VMID_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_VVMA_SENT"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_VVMA_RECEIVED"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_VVMA_ASID_SENT"
> > > + },
> > > + {
> > > + "ArchStdEvent": "FW_HFENCE_VVMA_ASID_RECEIVED"
> > > + }
> > > +]
> > > diff --git a/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/instruction.json b/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/instruction.json
> > > new file mode 100644
> > > index 000000000000..7f1649548177
> > > --- /dev/null
> > > +++ b/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/instruction.json
> > > @@ -0,0 +1,72 @@
> > > +[
> > > + {
> > > + "EventName": "BR_COND_MIS_PRED",
> > > + "EventCode": "0x000006",
> > > + "BriefDescription": "Conditional branch mispredict"
> > > + },
> > > + {
> > > + "EventName": "INST_BR_COND_MIS",
> > > + "EventCode": "0x000007",
> > > + "BriefDescription": "Conditional branch instruction"
> > > + },
> > > + {
> > > + "EventName": "BR_INDIRECT_MIS_PRED",
> > > + "EventCode": "0x000008",
> > > + "BriefDescription": "Indirect branch mispredict"
> > > + },
> > > + {
> > > + "EventName": "INST_BR_COND_MIS",
> > > + "EventCode": "0x000009",
> > > + "BriefDescription": "Indirect branch instruction"
> > > + },
> > > + {
> > > + "EventName": "INST_STORE",
> > > + "EventCode": "0x00000b",
> > > + "BriefDescription": "Store instruction retired"
> > > + },
> > > + {
> > > + "EventName": "INST_ALU",
> > > + "EventCode": "0x00001d",
> > > + "BriefDescription": "ALU instruction retired"
> > > + },
> > > + {
> > > + "EventName": "INST_LOAD_SAVE",
> > > + "EventCode": "0x00001e",
> > > + "BriefDescription": "LOAD/Store instruction retired"
> > > + },
> > > + {
> > > + "EventName": "INST_VECTOR",
> > > + "EventCode": "0x00001f",
> > > + "BriefDescription": "Vector instruction retired"
> > > + },
> > > + {
> > > + "EventName": "INST_CSR_ACCESS",
> > > + "EventCode": "0x000020",
> > > + "BriefDescription": "CSR access instruction retired"
> > > + },
> > > + {
> > > + "EventName": "INST_SYNC",
> > > + "EventCode": "0x000021",
> > > + "BriefDescription": "Sync instruction retired"
> > > + },
> > > + {
> > > + "EventName": "INST_LOAD_SAVE_UNALIGNED",
> > > + "EventCode": "0x000022",
> > > + "BriefDescription": "Load/Store unaligned access instruction
> > > retired"
> > > + },
> > > + {
> > > + "EventName": "INST_ENV_CALL",
> > > + "EventCode": "0x000025",
> > > + "BriefDescription": "Environment call instruction retired"
> > > + },
> > > + {
> > > + "EventName": "INST_LONGJUMP",
> > > + "EventCode": "0x000026",
> > > + "BriefDescription": "Long jump instruction retired (jump
> > > dist
> > > over 8MB)"
> > > + },
> > > + {
> > > + "EventName": "INST_FP",
> > > + "EventCode": "0x00002a",
> > > + "BriefDescription": "Float point instruction retired"
> > > + }
> > > +]
> > > diff --git a/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/microarch.json b/tools/perf/pmu-events/arch/riscv/t-
> > > head/c9xx/microarch.json
> > > new file mode 100644
> > > index 000000000000..073c1d085021
> > > --- /dev/null
> > > +++ b/tools/perf/pmu-events/arch/riscv/t-head/c9xx/microarch.json
> > > @@ -0,0 +1,67 @@
> > > +[
> > > + {
> > > + "EventName": "LSU_SPEC_FAIL",
> > > + "EventCode": "0x00000a",
> > > + "BriefDescription": "LSU Spec Fail"
> > > + },
> > > + {
> > > + "EventName": "RF_LAUNCH_FAIL",
> > > + "EventCode": "0x000014",
> > > + "BriefDescription": "Register file launch fail"
> > > + },
> > > + {
> > > + "EventName": "RF_REG_LAUNCH",
> > > + "EventCode": "0x000015",
> > > + "BriefDescription": "Register file reg launch"
> > > + },
> > > + {
> > > + "EventName": "RF_INSTRUCTION",
> > > + "EventCode": "0x000016",
> > > + "BriefDescription": "Register file instruction"
> > > + },
> > > + {
> > > + "EventName": "LSU_STALL_CROSS_4K",
> > > + "EventCode": "0x000017",
> > > + "BriefDescription": "LSU stall with cross 4K access"
> > > + },
> > > + {
> > > + "EventName": "LSU_STALL_OTHER",
> > > + "EventCode": "0x000018",
> > > + "BriefDescription": "LSU stall with other events"
> > > + },
> > > + {
> > > + "EventName": "LSU_SQ_DISCARD",
> > > + "EventCode": "0x000019",
> > > + "BriefDescription": "LSU SQ discard"
> > > + },
> > > + {
> > > + "EventName": "LSU_SQ_DISCARD_DATA",
> > > + "EventCode": "0x00001a",
> > > + "BriefDescription": "LSU SQ data discard"
> > > + },
> > > + {
> > > + "EventName": "INT_NUMBER",
> > > + "EventCode": "0x000023",
> > > + "BriefDescription": "Interrupt number respond"
> > > + },
> > > + {
> > > + "EventName": "INT_OFF_CYCLE",
> > > + "EventCode": "0x000024",
> > > + "BriefDescription": "Off cycle before interrupt arbitrating"
> > > + },
> > > + {
> > > + "EventName": "STALLED_CYCLE_IFU",
> > > + "EventCode": "0x000027",
> > > + "BriefDescription": "Stall cycles of the instruction fetch
> > > unit"
> > > + },
> > > + {
> > > + "EventName": "STALLED_CYCLE_IDU",
> > > + "EventCode": "0x000028",
> > > + "BriefDescription": "Stall cycles of the instruction
> > > decoding
> > > unit and next-level pipeline unit"
> > > + },
> > > + {
> > > + "EventName": "STALLED_CYCLE_SYNC",
> > > + "EventCode": "0x000029",
> > > + "BriefDescription": "Stalled cycle for sync instructions
> > > (FENCE/FENCE.i/SFENCE/SYNC...)"
> > > + }
> > > +]
> > > --
> > > 2.40.1
> > >
> > >
> > > _______________________________________________
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> > > linux-riscv@xxxxxxxxxxxxxxxxxxx
> > > http://lists.infradead.org/mailman/listinfo/linux-riscv
> >
> > _______________________________________________
> > linux-riscv mailing list
> > linux-riscv@xxxxxxxxxxxxxxxxxxx
> > http://lists.infradead.org/mailman/listinfo/linux-riscv
>
>
>