| /** |
| * Copyright (C) ARM Limited 2013-2014. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include "PerfDriver.h" |
| |
| #include <dirent.h> |
| #include <sys/utsname.h> |
| #include <time.h> |
| |
| #include "Buffer.h" |
| #include "Config.h" |
| #include "ConfigurationXML.h" |
| #include "Counter.h" |
| #include "DriverSource.h" |
| #include "DynBuf.h" |
| #include "Logging.h" |
| #include "PerfGroup.h" |
| #include "SessionData.h" |
| |
| #define PERF_DEVICES "/sys/bus/event_source/devices" |
| |
| #define TYPE_DERIVED ~0U |
| |
| // From gator.h |
| struct gator_cpu { |
| const int cpuid; |
| // Human readable name |
| const char core_name[32]; |
| // gatorfs event and Perf PMU name |
| const char *const pmnc_name; |
| const int pmnc_counters; |
| }; |
| |
| // From gator_main.c |
| static const struct gator_cpu gator_cpus[] = { |
| { 0xb36, "ARM1136", "ARM_ARM11", 3 }, |
| { 0xb56, "ARM1156", "ARM_ARM11", 3 }, |
| { 0xb76, "ARM1176", "ARM_ARM11", 3 }, |
| { 0xb02, "ARM11MPCore", "ARM_ARM11MPCore", 3 }, |
| { 0xc05, "Cortex-A5", "ARMv7_Cortex_A5", 2 }, |
| { 0xc07, "Cortex-A7", "ARMv7_Cortex_A7", 4 }, |
| { 0xc08, "Cortex-A8", "ARMv7_Cortex_A8", 4 }, |
| { 0xc09, "Cortex-A9", "ARMv7_Cortex_A9", 6 }, |
| { 0xc0d, "Cortex-A12", "ARMv7_Cortex_A12", 6 }, |
| { 0xc0f, "Cortex-A15", "ARMv7_Cortex_A15", 6 }, |
| { 0xc0e, "Cortex-A17", "ARMv7_Cortex_A17", 6 }, |
| { 0x00f, "Scorpion", "Scorpion", 4 }, |
| { 0x02d, "ScorpionMP", "ScorpionMP", 4 }, |
| { 0x049, "KraitSIM", "Krait", 4 }, |
| { 0x04d, "Krait", "Krait", 4 }, |
| { 0x06f, "Krait S4 Pro", "Krait", 4 }, |
| { 0xd03, "Cortex-A53", "ARM_Cortex-A53", 6 }, |
| { 0xd07, "Cortex-A57", "ARM_Cortex-A57", 6 }, |
| { 0xd0f, "AArch64", "ARM_AArch64", 6 }, |
| }; |
| |
| static const char OLD_PMU_PREFIX[] = "ARMv7 Cortex-"; |
| static const char NEW_PMU_PREFIX[] = "ARMv7_Cortex_"; |
| |
| class PerfCounter { |
| public: |
| PerfCounter(PerfCounter *next, const char *name, uint32_t type, uint64_t config) : mNext(next), mName(name), mType(type), mCount(0), mKey(getEventKey()), mConfig(config), mEnabled(false) {} |
| ~PerfCounter() { |
| delete [] mName; |
| } |
| |
| PerfCounter *getNext() const { return mNext; } |
| const char *getName() const { return mName; } |
| uint32_t getType() const { return mType; } |
| int getCount() const { return mCount; } |
| void setCount(const int count) { mCount = count; } |
| int getKey() const { return mKey; } |
| uint64_t getConfig() const { return mConfig; } |
| void setConfig(const uint64_t config) { mConfig = config; } |
| bool isEnabled() const { return mEnabled; } |
| void setEnabled(const bool enabled) { mEnabled = enabled; } |
| |
| private: |
| PerfCounter *const mNext; |
| const char *const mName; |
| const uint32_t mType; |
| int mCount; |
| const int mKey; |
| uint64_t mConfig; |
| bool mEnabled; |
| }; |
| |
| PerfDriver::PerfDriver() : mCounters(NULL), mIsSetup(false) { |
| } |
| |
| PerfDriver::~PerfDriver() { |
| while (mCounters != NULL) { |
| PerfCounter *counter = mCounters; |
| mCounters = counter->getNext(); |
| delete counter; |
| } |
| } |
| |
| void PerfDriver::addCpuCounters(const char *const counterName, const int type, const int numCounters) { |
| int len = snprintf(NULL, 0, "%s_ccnt", counterName) + 1; |
| char *name = new char[len]; |
| snprintf(name, len, "%s_ccnt", counterName); |
| mCounters = new PerfCounter(mCounters, name, type, -1); |
| |
| for (int j = 0; j < numCounters; ++j) { |
| len = snprintf(NULL, 0, "%s_cnt%d", counterName, j) + 1; |
| name = new char[len]; |
| snprintf(name, len, "%s_cnt%d", counterName, j); |
| mCounters = new PerfCounter(mCounters, name, type, -1); |
| } |
| } |
| |
| // From include/generated/uapi/linux/version.h |
| #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
| |
| bool PerfDriver::setup() { |
| // Check the kernel version |
| struct utsname utsname; |
| if (uname(&utsname) != 0) { |
| logg->logMessage("%s(%s:%i): uname failed", __FUNCTION__, __FILE__, __LINE__); |
| return false; |
| } |
| |
| int release[3] = { 0, 0, 0 }; |
| int part = 0; |
| char *ch = utsname.release; |
| while (*ch >= '0' && *ch <= '9' && part < ARRAY_LENGTH(release)) { |
| release[part] = 10*release[part] + *ch - '0'; |
| |
| ++ch; |
| if (*ch == '.') { |
| ++part; |
| ++ch; |
| } |
| } |
| |
| if (KERNEL_VERSION(release[0], release[1], release[2]) < KERNEL_VERSION(3, 12, 0)) { |
| logg->logMessage("%s(%s:%i): Unsupported kernel version", __FUNCTION__, __FILE__, __LINE__); |
| return false; |
| } |
| |
| // Add supported PMUs |
| bool foundCpu = false; |
| DIR *dir = opendir(PERF_DEVICES); |
| if (dir == NULL) { |
| logg->logMessage("%s(%s:%i): opendif failed", __FUNCTION__, __FILE__, __LINE__); |
| return false; |
| } |
| |
| struct dirent *dirent; |
| while ((dirent = readdir(dir)) != NULL) { |
| for (int i = 0; i < ARRAY_LENGTH(gator_cpus); ++i) { |
| // Do the names match exactly? |
| if (strcmp(dirent->d_name, gator_cpus[i].pmnc_name) != 0 && |
| // Do these names match but have the old vs new prefix? |
| (strncmp(dirent->d_name, OLD_PMU_PREFIX, sizeof(OLD_PMU_PREFIX) - 1) != 0 || |
| strncmp(gator_cpus[i].pmnc_name, NEW_PMU_PREFIX, sizeof(NEW_PMU_PREFIX) - 1) != 0 || |
| strcmp(dirent->d_name + sizeof(OLD_PMU_PREFIX) - 1, gator_cpus[i].pmnc_name + sizeof(NEW_PMU_PREFIX) - 1) != 0)) { |
| continue; |
| } |
| |
| int type; |
| char buf[256]; |
| snprintf(buf, sizeof(buf), PERF_DEVICES "/%s/type", dirent->d_name); |
| if (DriverSource::readIntDriver(buf, &type) != 0) { |
| continue; |
| } |
| |
| foundCpu = true; |
| addCpuCounters(gator_cpus[i].pmnc_name, type, gator_cpus[i].pmnc_counters); |
| } |
| } |
| closedir(dir); |
| |
| if (!foundCpu) { |
| // If no cpu was found based on pmu names, try by cpuid |
| for (int i = 0; i < ARRAY_LENGTH(gator_cpus); ++i) { |
| if (gSessionData->mMaxCpuId != gator_cpus[i].cpuid) { |
| continue; |
| } |
| |
| foundCpu = true; |
| addCpuCounters(gator_cpus[i].pmnc_name, PERF_TYPE_RAW, gator_cpus[i].pmnc_counters); |
| } |
| } |
| |
| /* |
| if (!foundCpu) { |
| // If all else fails, use the perf architected counters |
| // 9 because that's how many are in events-Perf-Hardware.xml - assume they can all be enabled at once |
| addCpuCounters("Perf_Hardware", PERF_TYPE_HARDWARE, 9); |
| } |
| */ |
| |
| // Add supported software counters |
| long long id; |
| DynBuf printb; |
| |
| id = getTracepointId("irq/softirq_exit", &printb); |
| if (id >= 0) { |
| mCounters = new PerfCounter(mCounters, "Linux_irq_softirq", PERF_TYPE_TRACEPOINT, id); |
| } |
| |
| id = getTracepointId("irq/irq_handler_exit", &printb); |
| if (id >= 0) { |
| mCounters = new PerfCounter(mCounters, "Linux_irq_irq", PERF_TYPE_TRACEPOINT, id); |
| } |
| |
| //Linux_block_rq_wr |
| //Linux_block_rq_rd |
| //Linux_net_rx |
| //Linux_net_tx |
| |
| id = getTracepointId(SCHED_SWITCH, &printb); |
| if (id >= 0) { |
| mCounters = new PerfCounter(mCounters, "Linux_sched_switch", PERF_TYPE_TRACEPOINT, id); |
| } |
| |
| //Linux_meminfo_memused |
| //Linux_meminfo_memfree |
| //Linux_meminfo_bufferram |
| //Linux_power_cpu_freq |
| //Linux_power_cpu_idle |
| |
| mCounters = new PerfCounter(mCounters, "Linux_cpu_wait_contention", TYPE_DERIVED, -1); |
| |
| //Linux_cpu_wait_io |
| |
| mIsSetup = true; |
| return true; |
| } |
| |
| bool PerfDriver::summary(Buffer *const buffer) { |
| struct utsname utsname; |
| if (uname(&utsname) != 0) { |
| logg->logMessage("%s(%s:%i): uname failed", __FUNCTION__, __FILE__, __LINE__); |
| return false; |
| } |
| |
| char buf[512]; |
| snprintf(buf, sizeof(buf), "%s %s %s %s %s GNU/Linux", utsname.sysname, utsname.nodename, utsname.release, utsname.version, utsname.machine); |
| |
| struct timespec ts; |
| if (clock_gettime(CLOCK_REALTIME, &ts) != 0) { |
| logg->logMessage("%s(%s:%i): clock_gettime failed", __FUNCTION__, __FILE__, __LINE__); |
| return false; |
| } |
| const int64_t timestamp = (int64_t)ts.tv_sec * 1000000000L + ts.tv_nsec; |
| |
| if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) { |
| logg->logMessage("%s(%s:%i): clock_gettime failed", __FUNCTION__, __FILE__, __LINE__); |
| return false; |
| } |
| const int64_t uptime = (int64_t)ts.tv_sec * 1000000000L + ts.tv_nsec; |
| |
| buffer->summary(timestamp, uptime, 0, buf); |
| |
| for (int i = 0; i < gSessionData->mCores; ++i) { |
| int j; |
| for (j = 0; j < ARRAY_LENGTH(gator_cpus); ++j) { |
| if (gator_cpus[j].cpuid == gSessionData->mCpuIds[i]) { |
| break; |
| } |
| } |
| if (gator_cpus[j].cpuid == gSessionData->mCpuIds[i]) { |
| buffer->coreName(i, gSessionData->mCpuIds[i], gator_cpus[j].core_name); |
| } else { |
| snprintf(buf, sizeof(buf), "Unknown (0x%.3x)", gSessionData->mCpuIds[i]); |
| buffer->coreName(i, gSessionData->mCpuIds[i], buf); |
| } |
| } |
| buffer->commit(1); |
| |
| return true; |
| } |
| |
| PerfCounter *PerfDriver::findCounter(const Counter &counter) const { |
| for (PerfCounter * perfCounter = mCounters; perfCounter != NULL; perfCounter = perfCounter->getNext()) { |
| if (strcmp(perfCounter->getName(), counter.getType()) == 0) { |
| return perfCounter; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| bool PerfDriver::claimCounter(const Counter &counter) const { |
| return findCounter(counter) != NULL; |
| } |
| |
| void PerfDriver::resetCounters() { |
| for (PerfCounter * counter = mCounters; counter != NULL; counter = counter->getNext()) { |
| counter->setEnabled(false); |
| } |
| } |
| |
| void PerfDriver::setupCounter(Counter &counter) { |
| PerfCounter *const perfCounter = findCounter(counter); |
| if (perfCounter == NULL) { |
| counter.setEnabled(false); |
| return; |
| } |
| |
| // Don't use the config from counters XML if it's not set, ex: software counters |
| if (counter.getEvent() != -1) { |
| perfCounter->setConfig(counter.getEvent()); |
| } |
| perfCounter->setCount(counter.getCount()); |
| perfCounter->setEnabled(true); |
| counter.setKey(perfCounter->getKey()); |
| } |
| |
| int PerfDriver::writeCounters(mxml_node_t *root) const { |
| int count = 0; |
| for (PerfCounter * counter = mCounters; counter != NULL; counter = counter->getNext()) { |
| mxml_node_t *node = mxmlNewElement(root, "counter"); |
| mxmlElementSetAttr(node, "name", counter->getName()); |
| ++count; |
| } |
| |
| return count; |
| } |
| |
| bool PerfDriver::enable(PerfGroup *group, Buffer *const buffer) const { |
| for (PerfCounter * counter = mCounters; counter != NULL; counter = counter->getNext()) { |
| if (counter->isEnabled() && (counter->getType() != TYPE_DERIVED)) { |
| if (!group->add(buffer, counter->getKey(), counter->getType(), counter->getConfig(), counter->getCount(), 0, 0)) { |
| logg->logMessage("%s(%s:%i): PerfGroup::add failed", __FUNCTION__, __FILE__, __LINE__); |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| long long PerfDriver::getTracepointId(const char *const name, DynBuf *const printb) { |
| if (!printb->printf(EVENTS_PATH "/%s/id", name)) { |
| logg->logMessage("%s(%s:%i): DynBuf::printf failed", __FUNCTION__, __FILE__, __LINE__); |
| return -1; |
| } |
| |
| int64_t result; |
| if (DriverSource::readInt64Driver(printb->getBuf(), &result) != 0) { |
| logg->logMessage("%s(%s:%i): DriverSource::readInt64Driver failed", __FUNCTION__, __FILE__, __LINE__); |
| return -1; |
| } |
| |
| return result; |
| } |