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2023-09-13perfmon: fix perf_user_access_enabled typeTianyu Li1-1/+1
perf_user_access_enabled is defined as u8, clib_sysfs_read format type is %u, this is for unsigned int, change type from u8 to u32. Type: fix Fixes: 268d7be66b8b ("perfmon: enable perfmon plugin for Arm") Signed-off-by: Tianyu Li <tianyu.li@arm.com> Change-Id: I48ec00605e496d185370e77d894d7852d6d22124
2023-07-28vlib: pci cleanup and improvementsDamjan Marion1-2/+2
Change-Id: Ieafbed6f2db3dec65e4b43d84a4661f6a1bbe891 Type: improvement Signed-off-by: Damjan Marion <damarion@cisco.com>
2023-04-25perfmon: fix perfmon start type argumentMaxime Peim1-5/+3
When trying to start perfmon with a bundle that has a unique type while specifying that type as argument, the command fails (e.g. perfmon start bundle branch-mispred type node). This error occurs because the returned value of unformat_perfmon_active_type is actually a perfmon_bundle_type_t, but it was treated as a perfmon_bundle_type_flag_t by a test in the CLI function. However, this test is useless and thus can just be removed. Type: fix Signed-off-by: Maxime Peim <mpeim@cisco.com> Change-Id: I5d8b9815871621e8ee7b935586f4cedbc0e7a53d
2022-07-12perfmon: add Arm event bundlesZachary Leaf9-0/+874
Included statistic bundles (all NODE type): - Instructions and CPU cycles, including IPC - Data cache access/refills/% - Data TLB cache access/refills/% - Instruction cache access/refills/% - Instruction TLB cache access/refills/% - Memory/Bus accesses, memory errors - Branch (mis)predictions, architecturally & speculatively executed - Processor frontend/backend stalls (stalled cycles) Type: feature Signed-off-by: Zachary Leaf <zachary.leaf@arm.com> Tested-by: Jieqiang Wang <jieqiang.wang@arm.com> Change-Id: I7ea4a27c8df8fc7222b743a98bdceaff727e4112
2022-07-12perfmon: enable perfmon plugin for ArmZachary Leaf11-35/+654
This patch enables statistics from the Arm PMUv3 through the perfmon plugin. In comparison to using the Linux "perf" tool, it allows obtaining direct, per node level statistics (rather than per thread). By accessing the PMU counter registers directly from userspace, we can avoid the overhead of using a read() system call and get more accurate and fine grained statistics about the running of individual nodes. A demo of perfmon on Arm can be found at: https://asciinema.org/a/egVNN1OF7JEKHYmfl5bpDYxfF *Important Note* Perfmon on Arm is dependent on and works only on Linux kernel versions of v5.17+ as this is when userspace access to Arm perf counters was included. On most Arm systems, a maximum of 7 PMU events can be configured at once - (6x PMU events + 1x CPU_CYCLE counter). If some perf counters are in use elsewhere by other applications, and there are insufficient counters remaining to open the bundle, the perf_event_open call will fail (provided the events are grouped with the group_fd param, which perfmon currently utilises). See arm/events.h for a list of PMUv3 events available, although it is implementation defined whether most events are implemented or not. Only a small set of 7 events is required to be implemented in Armv8.0, with some additional events required in later versions. As such, depending on the implementation, some statistics may not be available. See Arm Architecture Reference Manual for Armv8-A, D7.10.2 "The PMU event number space and common events" for more information. arm/events.c:arm_init() gets information from the sysfs about what events are implemented on a particular CPU at runtime. Arm's implementation of the perfmon source callback .bundle_support uses this information to disable unsupported events in a bundle, or in the case no events are supported, disable the entire bundle. Where a particular event in a bundle is not implemented, the statistic for that event is shown as '-' in the 'show perfmon statistics' cli output, by disabling the column. There is additional code in perfmon.c to only open events which are marked as implemented. Since we're only opening and reading events that are implemented, some extra logic is required in cli.c to re-align either perfmon_node_stats_t or perfmon_reading_t with the column headings configured in each bundle, taking into account disabled columns. Userspace access to perf counters is disabled by default, and needs to be enabled with 'sudo sysctl kernel/perf_user_access=1'. There is a check built into the Arm event source init function (arm/events.c:arm_init) to check that userspace reading of perf counters is enabled in the /proc/sys/kernel/perf_user_access file. If the above file does not exist, it means the kernel version is unsupported. Users without a supported kernel will see a warning message, and no Arm bundles will be registered to use in perfmon. Enabling/using plugin: - include the following in startup.conf: - plugins { plugin perfmon_plugin.so { enable } - 'show perfmon bundle [verbose]' - show available statistics bundles - 'perfmon start bundle <bundle-name>' - enable and start logging - 'perfmon stop' - stop logging - 'show perfmon statistics' - show output For a general guide on using and understanding Arm PMUv3 events, see https://community.arm.com/arm-community-blogs/b/tools-software-ides-blog/posts/arm-neoverse-n1-performance-analysis-methodology Type: feature Signed-off-by: Zachary Leaf <zachary.leaf@arm.com> Tested-by: Jieqiang Wang <jieqiang.wang@arm.com> Change-Id: I0620fe5b1bbe78842dfb1d0b6a060bb99e777651
2022-07-12perfmon: make less arch dependentZachary Leaf8-101/+161
In preparation for enabling perfmon on Arm platforms, move some Intel /arch specific logic into the /intel directory and update the CMake to split the common code from arch specific files. Since the dispatch_wrapper code is very different on Arm/Intel, each arch can provide their own implementation + conduct any additional arch specific config e.g. on Intel, all indexes from the mmap pages are cached. The new method intel_config_dispatch_wrapper conducts this config and returns a pointer to the dispatch wrapper to use. Similarly, is_bundle_supported() looks very different on Arm/Intel, so each implementation is to provide their own arch specific checks. Two new callbacks/function ptrs are added in PERFMON_REGISTER_SOURCE to support this - .bundle_support and .config_dispatch_wrapper. Type: refactor Signed-off-by: Zachary Leaf <zachary.leaf@arm.com> Change-Id: Idd121ddcfd1cc80a57c949cecd64eb2db0ac8be3
2022-03-29perfmon: fix order in cmakelists.txtRay Kinsella1-8/+8
Fix ordering in CMakeLists.txt Type: refactor Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I8e71e4fbc048a80c4b250c2a66cfd8a522bde5f4
2022-03-29perfmon: fix non-NULL terminated C-stringBenoît Ganne1-1/+1
format() expects a NULL-terminated C-string as format string. Type: fix Change-Id: Ib428cf2debbf98850eed512907175f8ae8ba3c04 Signed-off-by: Benoît Ganne <bganne@cisco.com>
2022-03-23perfmon: null-terminate stringDamjan Marion1-1/+1
Type: fix Change-Id: I43ebb2c2922f3b8b8eddf26ccdf044f31d7b7a10 Signed-off-by: Damjan Marion <damarion@cisco.com>
2022-02-18perfmon: show distribution of uops delivered to frontendRay Kinsella4-8/+109
Breakdown the distribution of uops delivered to the frontend. Collerates directly with the source of the uops. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I93a57dbe56dfa0f378527844aa4e63f45a548e55
2022-02-06perfmon: Fix typo in debug log messagesJon Loeliger1-2/+2
Signed-off-by: Jon Loeliger <jdl@netgate.com> Type: style Change-Id: I955c19ddbe06ef3651c03820fcc14054c63258b9
2022-01-30perfmon: topdown level 1 and 2 for icxRay Kinsella4-63/+183
Topdown level 1 and 2 for Intel Ice Lake (ICX). Limiting topdown support to THREAD for the moment on Ice Lake, as NODE support is still unreliable. Also removing Topdown Level 1 from Sapphire Rapids onwards, as Topdown LeveL 2 also shows Level 1 on Sapphire, and it reduces the overall number of bundles. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Iaa68b711dc8b6fb1090880b411debadb3c37f8bc
2022-01-30perfmon: fix init of bundles with pseudo eventsRay Kinsella3-18/+41
Previously Linux pseudo events were being counted as multiple fixed events, such that a bundle with pseudo events could exceed the number of available fixed counters. Reworked to ignore pseudo events in the accounting for the moment. Type: fix Fixes: 0024e53ad Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Ic938f8266fd04d7731afbd02e261c61ef22a8522
2022-01-30perfmon: check for duplicates after other checksRay Kinsella1-3/+3
Move checking for duplicate bundle names after the other checks. Type: fix Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I7fed5be758814e166eb8756b3df090130ac13bfd
2022-01-30perfmon: topdown backend bound core bundleRay Kinsella3-0/+118
Add a bundle to measure topdown backend bound core cycles, will indicate if any given execution port has contention. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I37d1b38c101ac42d51c10fa4452b822d34b729c9
2022-01-27perfmon: frontend and backend boundness bundlesRay Kinsella6-68/+334
Renamed memory stalls to topdown backend-bound-mem, added topdown frontend-bound-latency and frontend-bound-bandwidth. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I70f42b6b63fe2502635cad4aed4271e2bbdda5f1
2022-01-27perfmon: prune bundles by available pmu countersRay Kinsella3-7/+46
Prune perfmon bundles that exceed the number of available pmu counters. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I70fec26bb8ca915f4b980963e06c2e43dfde5a23
2022-01-27perfmon: add cli to show perf configRay Kinsella2-9/+37
Added a cli to show Linux perf config for a give perfmon bundle. This makes it easier to format Linux perf commands for next level analysis. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I9adafa7d441b72120390d186e3c8f884b1bc9828
2022-01-12perfmon: skipping bundle messageRay Kinsella1-1/+1
Change the skipping bundle message to debug Type: refactor Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I942ff72bd9c26ccad923442fdedddf22ba75e117
2021-12-02perfmon: compile dispatch wrapper once for each number of countersDamjan Marion3-35/+27
A bit ugly, but generates faster and less noisy code which should be important for this particular use case. Type: improvement Change-Id: If2bba947dac33ffedb4236a5b3fb50fc783668e1 Signed-off-by: Damjan Marion <damarion@cisco.com>
2021-12-02perfmon: refactor perf metric supportRay Kinsella4-189/+80
Refactoring perf metric support to remove branching on bundle type in the dispatch wrapper. This change includes caching the rdpmc index at perfmon_start(), so that the mmap_page.index doesn't need to be looked up each time. It also exclude the effects of mmap_page.index. This patch prepares the path for bundles that support general, fixed and metrics counters simulataneously. Type: refactor Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I9c5b4917bd02fea960e546e8558452c4362eabc4
2021-11-16perfmon: fix coverity warningKlement Sekera1-2/+9
Check for possible hash lookup failure to avoid NULL dereference. Type: fix Fixes: e15c999c30 Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ib806b4d124be26fbccf36fe9d19af1aec63f487b
2021-11-15perfmon: rename bundle to memory stallsRay Kinsella2-9/+9
Rename the memory bandwidth bundle to memory stalls, to differentiate it from the bundle that measures memory controller bandwidth boundedness. Type: refactor Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I828c73b6f769046e1ab592712bdf81ceefcd7911
2021-11-08perfmon: fix iio-bw coverity issuesRay Kinsella1-3/+1
Fixes an number of coverity issues associated with the iio-bw feature. Type: fix Fixes: e15c999c3 Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I9ad2b336694132545d90a3483200a510226e9198
2021-11-07perfmon: numa node list probing should use '/online' instead of '/has_cpu'Xiaoming Jiang1-1/+1
Type: fix Signed-off-by: Xiaoming Jiang <jiangxiaoming@outlook.com> Change-Id: I85e41d58884af71afba960d20604bb1b01876d26
2021-11-02perfmon: added bundle to measure pci bandwidthRay Kinsella2-0/+259
Added an Intel Ice Lake specific bundles to measure pci bandwidth through the Intel IO PMU. The "PCI" bundle measures read/writes from pci devices. The "CPU" bundle measure read/writes from cpus to pci devices. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Id48cef5988113e8dc4690b97d22243311bfa7961
2021-11-02perfmon: added intel internal io pmu supportRay Kinsella2-9/+82
Added support for the Intel Internal IO Uncore PMU, along with the ability to format PMU Unit specific names. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I2939f8ade5e5ed63ccf7f3ccd0279d7c72e95a6e
2021-10-28perfmon: fix coverity warningKlement Sekera1-0/+8
Check that cpumask is initialised properly to avoid possible NULL pointer dereference. Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: I8df5a718104fe703d6baf3f1294b4a6d2ca01619
2021-10-26perfmon: properly unmap mmapped pagesKlement Sekera1-1/+1
Add missing array index so that actual mmapped pages are unmpapped instead of attempting to unmap array holding those pages. Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ib8709cce1bcbfb505307c140266834b284af796c
2021-10-16perfmon: topdown lvl 2 support on sapphire rapidsRay Kinsella2-11/+167
Added topdown level 2 support on sapphire rapids, including ability to indentify a sapphire rapids cpu. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I9f99a92fa0886b98bb5185cff32bebd5a094f329
2021-10-16perfmon: additional perf counters on icelakeRay Kinsella2-1/+31
The Intel Icelake uArch supports measuring up to 12 counters, comprised of 4 fixed and 8 general counters. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I68369ea55a0c95d6a4a280a464e69502bbf5474f
2021-10-07perfmon: Topdown Level 1 support on SnowridgeRay Kinsella4-1/+102
Enable Topdown Level 1 support on Snowridge, enabled with standard CPU events on small core. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I58ad09383de7464265ac1b69e683f253591e3b5e
2021-10-07perfmon: check bundle is supportedRay Kinsella1-0/+23
Add a check bundle is supported before futher activation. Enable different bundles with same name, supported on different platforms. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I73e8bbd1e07c05ebccd9146d48a234eb598a2388
2021-10-07perfmon: fix peusdo eventsRay Kinsella1-1/+1
Fix peusdo events, missed populating "core" events with peusdo events. Type: fix Fixes: bf37bf6f7 Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I569fa876f1b58540adac0b095be0ff4ade664dec
2021-10-05perfmon: bundles with multiple typesRay Kinsella4-35/+147
Allow perfmon bundles to support more than one bundle type, either node or thread. Only used for topdown bundle for the moment. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Iba3653a4deb39b0a8ee8ad448a7e8f954283ccd8
2021-10-04perfmon: topdown events as peusdo eventsRay Kinsella1-9/+13
Topdown events are peusdo events exposed by linux, and are only present on Intel platforms. Change to clarifies this. Type: fix Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I6a3dcea5f43f53dbb96475329baf5e596a24d54f
2021-09-17vppinfra: move format_table from perfmonNathan Skrzypczak4-373/+1
This code seems really usefull for reuse in other plugins, for pretty table formatting Type: feature Change-Id: Ib5784a0dfc81b7d5a5d1f5ccdd02072e460a50fb Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
2021-09-17misc: put devtools plugins into separate component/packageDamjan Marion1-0/+3
Type: make Change-Id: I2958e9eddadee6434766ecd3cdb3b9cea742ed64 Signed-off-by: Damjan Marion <damarion@cisco.com>
2021-09-08perfmon: sort 'show perfmon bundle' outputZachary Leaf1-0/+11
This patch sorts 'show perfmon bundle' output in alphabetical order. Type: improvement Signed-off-by: Zachary Leaf <zachary.leaf@arm.com> Change-Id: I26b379b5d6766b9f87f9a3a5013ea92b207fb5d4
2021-09-08perfmon: add membw-bound bundleRay Kinsella4-1/+80
Added memory bandwidth boundedness bundle, closely related to cache-hierarchy. This bundle works on ICX only, due to an ICX specific counter. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Id385bd5f4e645ac020774e311c623afb64b79b1e
2021-09-08perfmon: adding support for papi TMAMRay Kinsella4-54/+113
Adding support for Linux papi TMAM on Intel Snowridge. Adds the ability to indicate that a bundle should be thread or node bundle type based on available cpu features (rdpmc support). Type: feature Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Ib871b2644fdb2410fbb580e0d21c3a8e2be13aba
2021-08-20perfmon: fix perf event user page readBenoît Ganne1-45/+76
When mmap()-ing perf event in userspace, we must adhere to the kernel update protocol to read consistent values. Also, 'offset' is an offset to add to the counter value, not to apply to the PMC index. Type: fix Change-Id: I59106bb3a48185ff3fcb0d2f09097269a67bb6d6 Signed-off-by: Benoît Ganne <bganne@cisco.com>
2021-05-26perfmon: revert raw column supportRay Kinsella3-30/+0
Revert raw column from the perfmon plugin. Type: refactor Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: If127f57ee2022cc1c0ea5177f1655a792f195f1d
2021-04-27perfmon: top down level 1 supportmdr788-25/+247
Adding perfmon node TMAM support on ICX. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I48a9a9ff6a72efc28eaf0cb11ef39fb62cebb126
2021-04-01perfmon: combined set and start command.Ray Kinsella3-47/+36
Original set, start, stop, reset, show etc interface was somewhat cumbersome, we can improve slightly by combining set and start. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I7b865b2c29d2ab32adbd24d7f8a580da6990bb76
2021-04-01perfmon: % power level per nodeRay Kinsella2-0/+58
Show % time spent per graph node in power level 0, 1 and 2. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: I678ee812fa993af39568e9f9dfbf2396fc13ad42
2021-03-31perfmon: add branch mispredictionsRay Kinsella3-0/+76
Add branches, branches taken (a meteric for branchy code), and branch misses. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: If92d4aaf9d0a6e3b99b8c19e6311cc08ca470590
2021-03-26vlib: introduce vlib_get_main_by_index(), vlib_get_n_threads()Damjan Marion1-8/+8
Type: improvement Change-Id: If3da7d4338470912f37ff1794620418d928fb77f Signed-off-by: Damjan Marion <damarion@cisco.com>
2021-03-16perfmon: fixes for cache hierarchyRay Kinsella1-8/+12
Account for occasional instances with the misses rates between caches are inconsistent. Type: fix Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Idfb8bb7543401405cfe04291ad201c28be030cc9
2021-03-16perfmon: add support for raw and timestampsRay Kinsella3-1/+24
Add perfmon plugin support to output raw counter and timestamps, both are useful for debug. Type: improvement Signed-off-by: Ray Kinsella <mdr@ashroe.eu> Change-Id: Ia5a73d1f05e3464c18991c2346f0ed8b7ef63099