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#2302: Add task clearing to thePerfData
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| /* | ||
| //@HEADER | ||
| // ***************************************************************************** | ||
| // | ||
| // perf_data.cc | ||
| // DARMA/vt => Virtual Transport | ||
| // | ||
| // Copyright 2019-2021 National Technology & Engineering Solutions of Sandia, LLC | ||
| // (NTESS). Under the terms of Contract DE-NA0003525 with NTESS, the U.S. | ||
| // Government retains certain rights in this software. | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are met: | ||
| // | ||
| // * Redistributions of source code must retain the above copyright notice, | ||
| // this list of conditions and the following disclaimer. | ||
| // | ||
| // * Redistributions in binary form must reproduce the above copyright notice, | ||
| // this list of conditions and the following disclaimer in the documentation | ||
| // and/or other materials provided with the distribution. | ||
| // | ||
| // * Neither the name of the copyright holder nor the names of its | ||
| // contributors may be used to endorse or promote products derived from this | ||
| // software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
| // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
| // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
| // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| // POSSIBILITY OF SUCH DAMAGE. | ||
| // | ||
| // Questions? Contact darma@sandia.gov | ||
| // | ||
| // ***************************************************************************** | ||
| //@HEADER | ||
| */ | ||
|
|
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| #include "perf_data.h" | ||
|
|
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| namespace vt { namespace metrics { | ||
|
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| PerfData::PerfData() | ||
| { | ||
| event_map_ = example_event_map; | ||
| const char* env_p = getenv("VT_EVENTS"); | ||
|
|
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| // Check if the environment variable is set | ||
| if (env_p == nullptr) { | ||
| vtWarn("Warning: Environment variable VT_EVENTS not set, defaulting to 'instructions' for the PAPI event set.\n"); | ||
| event_names_.push_back("instructions"); | ||
| } | ||
| else { | ||
| std::string env_str(env_p); | ||
| std::stringstream ss(env_str); | ||
| std::string item; | ||
|
|
||
| while (std::getline(ss, item, ',')) | ||
| { | ||
| event_names_.push_back(item); | ||
| } | ||
| } | ||
|
|
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| for (const auto &event_name : event_names_) | ||
| { | ||
| if (event_map_.find(event_name) == event_map_.end()) | ||
| { | ||
| cleanupBeforeAbort(); | ||
| vtAbort("Event name isn't in known perf events map: " + event_name); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| PerfData::~PerfData() | ||
| { | ||
| for (auto& [task, fds] : task_fds_map_) | ||
| { | ||
| for (int fd : fds) | ||
| { | ||
| if (fd != -1) | ||
| { | ||
| close(fd); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| void PerfData::startTaskMeasurement(runnable::RunnableNew* task) | ||
| { | ||
| // fmt::print("*********** startTaskMeasurement: PerfData currently is tracking {} tasks\n", task_fds_map_.size()); | ||
| if (task_fds_map_.find(task) == task_fds_map_.end()) | ||
| { | ||
| // fmt::print(" Task was not in the task_fds_map_.\n"); | ||
| std::vector<int> fds; | ||
| for (const auto &event_name : event_names_) | ||
| { | ||
| struct perf_event_attr pe = {}; | ||
| pe.type = event_map_.at(event_name).first; | ||
| pe.size = sizeof(struct perf_event_attr); | ||
| pe.config = event_map_.at(event_name).second; | ||
|
|
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| pe.disabled = 1; | ||
| pe.exclude_kernel = 1; | ||
| pe.exclude_hv = 1; | ||
| pe.inherit = 1; // Ensure event is inherited by threads | ||
|
|
||
| if (event_name == "instructions") { | ||
| pe.pinned = 1; | ||
| } | ||
|
|
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| int fd = perf_event_open(&pe, 0, -1, -1, PERF_FLAG_FD_CLOEXEC); | ||
| if (fd == -1) | ||
| { | ||
| cleanupBeforeAbort(); | ||
| vtAbort("Error opening perf event: " + std::string(strerror(errno))); | ||
| } | ||
|
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| fds.push_back(fd); | ||
| } | ||
| task_fds_map_[task] = fds; | ||
| } | ||
|
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||
| for (int fd : task_fds_map_[task]) | ||
| { | ||
| if (fd != -1) { | ||
| ioctl(fd, PERF_EVENT_IOC_RESET, 0); | ||
| ioctl(fd, PERF_EVENT_IOC_ENABLE, 0); | ||
| } | ||
| } | ||
| } | ||
|
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||
| void PerfData::stopTaskMeasurement(runnable::RunnableNew* task) | ||
| { | ||
| // fmt::print("*********** stopTaskMeasurement: PerfData currently is tracking {} tasks\n", task_fds_map_.size()); | ||
| if (task_fds_map_.find(task) != task_fds_map_.end()) | ||
| { | ||
| for (int fd : task_fds_map_[task]) | ||
| { | ||
| if (fd != -1) { | ||
| ioctl(fd, PERF_EVENT_IOC_DISABLE, 0); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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||
| std::unordered_map<std::string, uint64_t> PerfData::getTaskMeasurements(runnable::RunnableNew* task) | ||
| { | ||
| // fmt::print("*********** getTaskMeasurements: PerfData currently is tracking {} tasks\n", task_fds_map_.size()); | ||
| std::unordered_map<std::string, uint64_t> measurements; | ||
| if (task_fds_map_.find(task) != task_fds_map_.end()) | ||
| { | ||
| for (size_t i = 0; i < task_fds_map_[task].size(); ++i) | ||
| { | ||
| uint64_t count; | ||
| if (task_fds_map_[task][i] != -1 && read(task_fds_map_[task][i], &count, sizeof(uint64_t)) != -1) { | ||
| measurements[event_names_[i]] = count; | ||
| } | ||
| else { | ||
| vtWarn("Failed to read perf event data for: " + event_names_[i]); | ||
| } | ||
| } | ||
| } | ||
| return measurements; | ||
| } | ||
|
|
||
| void PerfData::purgeTask(runnable::RunnableNew* task) | ||
| { | ||
| if (task_fds_map_.find(task) != task_fds_map_.end()) | ||
| { | ||
| for (int fd : task_fds_map_[task]) | ||
| { | ||
| if (fd != -1) | ||
| { | ||
| close(fd); | ||
| } | ||
| } | ||
| task_fds_map_.erase(task); | ||
| } | ||
| } | ||
|
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| std::unordered_map<std::string, std::pair<uint64_t,uint64_t>> PerfData::getEventMap() const { return event_map_; } | ||
|
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| void PerfData::startup() { event_map_ = example_event_map; } | ||
|
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| std::string PerfData::name() { return "PerfData"; } | ||
|
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| template <typename SerializerT> | ||
| void PerfData::serialize(SerializerT& s) { | ||
| s | event_map_; | ||
| } | ||
|
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| void PerfData::cleanupBeforeAbort() | ||
| { | ||
| for (auto& [task, fds] : task_fds_map_) | ||
| { | ||
| for (int fd : fds) | ||
| { | ||
| if (fd != -1) | ||
| { | ||
| close(fd); | ||
| } | ||
| } | ||
| } | ||
| task_fds_map_.clear(); | ||
| } | ||
|
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||
| long PerfData::perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu, int group_fd, unsigned long flags) | ||
| { | ||
| return syscall(__NR_perf_event_open, hw_event, pid, cpu, group_fd, flags); | ||
| } | ||
|
|
||
| }} // end namespace vt::metrics |
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