요약·해설, 영어 원문, 전체 번역을 구분해 실었습니다. API 이름, 코드 심벌, 소스 경로는 원문 표기를 유지합니다.
1. 요약·해설
원문의 핵심 내용을 정리하고 커널 프로그래밍에 필요한 설명을 덧붙였습니다. 아래의 전체 번역과는 별도로 작성한 해설입니다.
2. 영어 원문 전체
번역에 사용한 Linux v6.18.37 원문입니다. 줄 번호는 해당 버전의 소스 파일을 기준으로 합니다.
원문 전체 펼치기
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Marvell Odyssey PEM Performance Monitoring Unit (PMU UNCORE)
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=================================================================
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The PCI Express Interface Units(PEM) are associated with a corresponding
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monitoring unit. This includes performance counters to track various
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characteristics of the data that is transmitted over the PCIe link.
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The counters track inbound and outbound transactions which
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includes separate counters for posted/non-posted/completion TLPs.
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Also, inbound and outbound memory read requests along with their
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latencies can also be monitored. Address Translation Services(ATS)events
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such as ATS Translation, ATS Page Request, ATS Invalidation along with
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their corresponding latencies are also tracked.
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There are separate 64 bit counters to measure posted/non-posted/completion
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tlps in inbound and outbound transactions. ATS events are measured by
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different counters.
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The PMU driver exposes the available events and format options under sysfs,
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/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/events/
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/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/format/
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Examples::
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# perf list | grep mrvl_pcie_rc_pmu
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mrvl_pcie_rc_pmu_<>/ats_inv/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ats_inv_latency/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ats_pri/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ats_pri_latency/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ats_trans/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ats_trans_latency/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_inflight/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_reads/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_req_no_ro_ebus/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_req_no_ro_ncb/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_tlp_cpl_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_cpl_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_npr/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_pr/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_tlp_npr/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ib_tlp_pr/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_inflight_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_merges_cpl_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_merges_npr_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_merges_pr_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_reads_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_tlp_cpl_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_cpl_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_npr_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_pr_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_tlp_npr_partid/ [Kernel PMU event]
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mrvl_pcie_rc_pmu_<>/ob_tlp_pr_partid/ [Kernel PMU event]
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# perf stat -e ib_inflight,ib_reads,ib_req_no_ro_ebus,ib_req_no_ro_ncb <workload>
3. 한국어 전문 번역
영어 원문의 문단 순서와 의미에 맞춰 전체 내용을 번역했습니다. 코드, 함수명, 코드 심벌, URL은 원문 표기를 유지합니다.
PCIe transaction과 ATS counters
1-18각 PCI Express Interface Unit (PEM)에는 대응하는 monitoring unit이 있으며, PCIe link로 전송되는 data의 여러 특성을 performance counter로 추적합니다.
Inbound와 outbound transaction에서 posted, non-posted, completion TLP를 별도 counter로 셉니다. 양방향 memory read requests와 latencies도 감시합니다.
Address Translation Services (ATS)의 `ATS Translation`, `ATS Page Request`, `ATS Invalidation` event와 각 latency도 추적합니다. TLP class별 inbound/outbound 64 bit counters와 ATS용 counter는 서로 분리되어 있습니다.
| 기능군 | 측정 |
|---|---|
| Inbound TLP | Posted/non-posted/completion와 dword count |
| Outbound TLP | Posted/non-posted/completion와 dword count |
| Memory read | Inbound/outbound request, inflight, latency 관련 event |
| ATS | Translation, Page Request, Invalidation와 각 latency |
| Partition | `partid`가 붙은 outbound/inbound 세부 event |
PEM event와 format
19-23PMU driver는 사용 가능한 event와 format option을 sysfs에 노출합니다.
/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/events/
/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/format/| 항목 | 경로 |
|---|---|
| Events | `/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/events/` |
| Format | `/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/format/` |
ATS와 inbound/outbound event
24-56`perf list | grep mrvl_pcie_rc_pmu`로 ATS, inbound, outbound event를 확인하고 필요한 inbound request event를 `perf stat`으로 함께 측정합니다.
# perf list | grep mrvl_pcie_rc_pmu
mrvl_pcie_rc_pmu_<>/ats_inv/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ats_inv_latency/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ats_pri/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ats_pri_latency/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ats_trans/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ats_trans_latency/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_inflight/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_reads/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_req_no_ro_ebus/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_req_no_ro_ncb/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_tlp_cpl_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_cpl_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_npr/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_pr/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_tlp_npr/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ib_tlp_pr/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_inflight_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_merges_cpl_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_merges_npr_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_merges_pr_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_reads_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_tlp_cpl_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_cpl_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_npr_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_pr_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_tlp_npr_partid/ [Kernel PMU event]
mrvl_pcie_rc_pmu_<>/ob_tlp_pr_partid/ [Kernel PMU event]
# perf stat -e ib_inflight,ib_reads,ib_req_no_ro_ebus,ib_req_no_ro_ncb <workload>영역Event
ATS invalidation`ats_inv`, `ats_inv_latency`
ATS page request`ats_pri`, `ats_pri_latency`
ATS translation`ats_trans`, `ats_trans_latency`
Inbound request`ib_inflight`, `ib_reads`, `ib_req_no_ro_ebus`, `ib_req_no_ro_ncb`
Inbound TLP`ib_tlp_pr`, `ib_tlp_npr`, `ib_tlp_cpl_partid`, dword variants
Outbound request`ob_inflight_partid`, `ob_reads_partid`, merge variants
Outbound TLP`ob_tlp_pr_partid`, `ob_tlp_npr_partid`, `ob_tlp_cpl_partid`, dword variants
ATS와 inbound/outbound PCIe event를 방향과 transaction 종류별로 구조화했습니다.
운영 요약
mrvl-pem-pmu.rst:1-56PEM별 PMU에서 inbound/outbound TLP class, memory read, ATS operation과 각 latency를 별도 counter로 측정합니다.