1 files changed, 409 insertions, 0 deletions
diff --git a/tools/gator/daemon/PerfDriver.cpp b/tools/gator/daemon/PerfDriver.cpp
new file mode 100644
index 000000000000..796ee7564c66
--- /dev/null
+++ b/tools/gator/daemon/PerfDriver.cpp
@@ -0,0 +1,409 @@
+/**
+ * Copyright (C) ARM Limited 2013-2015. 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 <unistd.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"
+#include "Setup.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 *const core_name;
+	// 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[] = {
+	{ 0x41b36, "ARM1136",      "ARM_ARM11",        3 },
+	{ 0x41b56, "ARM1156",      "ARM_ARM11",        3 },
+	{ 0x41b76, "ARM1176",      "ARM_ARM11",        3 },
+	{ 0x41b02, "ARM11MPCore",  "ARM_ARM11MPCore",  3 },
+	{ 0x41c05, "Cortex-A5",    "ARMv7_Cortex_A5",  2 },
+	{ 0x41c07, "Cortex-A7",    "ARMv7_Cortex_A7",  4 },
+	{ 0x41c08, "Cortex-A8",    "ARMv7_Cortex_A8",  4 },
+	{ 0x41c09, "Cortex-A9",    "ARMv7_Cortex_A9",  6 },
+	{ 0x41c0f, "Cortex-A15",   "ARMv7_Cortex_A15", 6 },
+	{ 0x41c0d, "Cortex-A17",   "ARMv7_Cortex_A17", 6 },
+	{ 0x41c0e, "Cortex-A17",   "ARMv7_Cortex_A17", 6 },
+	{ 0x5100f, "Scorpion",     "Scorpion",         4 },
+	{ 0x5102d, "ScorpionMP",   "ScorpionMP",       4 },
+	{ 0x51049, "KraitSIM",     "Krait",            4 },
+	{ 0x5104d, "Krait",        "Krait",            4 },
+	{ 0x5106f, "Krait S4 Pro", "Krait",            4 },
+	{ 0x41d03, "Cortex-A53",   "ARM_Cortex-A53",   6 },
+	{ 0x41d07, "Cortex-A57",   "ARM_Cortex-A57",   6 },
+	{ 0x41d08, "Cortex-A72",   "ARM_Cortex-A72",   6 },
+};
+
+static const char OLD_PMU_PREFIX[] = "ARMv7 Cortex-";
+static const char NEW_PMU_PREFIX[] = "ARMv7_Cortex_";
+
+struct uncore_counter {
+	// Perf PMU name
+	const char *const perfName;
+	// gatorfs event name
+	const char *const gatorName;
+	const int count;
+	const bool hasCyclesCounter;
+};
+
+static const struct uncore_counter uncore_counters[] = {
+	{ "CCI_400",    "CCI_400",     4, true },
+	{ "CCI_400-r1", "CCI_400-r1",  4, true },
+	{ "CCI_500",    "CCI_500",     8, false },
+	{ "ccn",        "ARM_CCN_5XX", 8, true },
+};
+
+class PerfCounter : public DriverCounter {
+public:
+	PerfCounter(DriverCounter *next, const char *name, uint32_t type, uint64_t config, uint64_t sampleType, uint64_t flags) : DriverCounter(next, name), mType(type), mConfig(config), mSampleType(sampleType), mFlags(flags), mCount(0) {}
+
+	~PerfCounter() {
+	}
+
+	uint32_t getType() const { return mType; }
+	int getCount() const { return mCount; }
+	void setCount(const int count) { mCount = count; }
+	uint64_t getConfig() const { return mConfig; }
+	void setConfig(const uint64_t config) { mConfig = config; }
+	uint64_t getSampleType() const { return mSampleType; }
+	uint64_t getFlags() const { return mFlags; }
+	virtual void read(Buffer *const, const int) {}
+
+private:
+	const uint32_t mType;
+	uint64_t mConfig;
+	const uint64_t mSampleType;
+	const uint64_t mFlags;
+	int mCount;
+
+	// Intentionally undefined
+	PerfCounter(const PerfCounter &);
+	PerfCounter &operator=(const PerfCounter &);
+};
+
+class CPUFreqDriver : public PerfCounter {
+public:
+	CPUFreqDriver(DriverCounter *next, uint64_t id) : PerfCounter(next, "Linux_power_cpu_freq", PERF_TYPE_TRACEPOINT, id, PERF_SAMPLE_RAW, PERF_GROUP_LEADER | PERF_GROUP_PER_CPU) {}
+
+	void read(Buffer *const buffer, const int cpu) {
+		char buf[64];
+
+		snprintf(buf, sizeof(buf), "/sys/devices/system/cpu/cpu%i/cpufreq/cpuinfo_cur_freq", cpu);
+		int64_t freq;
+		if (DriverSource::readInt64Driver(buf, &freq) != 0) {
+			freq = 0;
+		}
+		buffer->perfCounter(cpu, getKey(), 1000*freq);
+	}
+
+private:
+	// Intentionally undefined
+	CPUFreqDriver(const CPUFreqDriver &);
+	CPUFreqDriver &operator=(const CPUFreqDriver &);
+};
+
+PerfDriver::PerfDriver() : mIsSetup(false), mLegacySupport(false) {
+}
+
+PerfDriver::~PerfDriver() {
+}
+
+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);
+	setCounters(new PerfCounter(getCounters(), name, type, -1, PERF_SAMPLE_READ, PERF_GROUP_PER_CPU | PERF_GROUP_CPU));
+
+	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);
+		setCounters(new PerfCounter(getCounters(), name, type, -1, PERF_SAMPLE_READ, PERF_GROUP_PER_CPU | PERF_GROUP_CPU));
+	}
+}
+
+void PerfDriver::addUncoreCounters(const char *const counterName, const int type, const int numCounters, const bool hasCyclesCounter) {
+	int len;
+	char *name;
+
+	if (hasCyclesCounter) {
+		len = snprintf(NULL, 0, "%s_ccnt", counterName) + 1;
+		name = new char[len];
+		snprintf(name, len, "%s_ccnt", counterName);
+		setCounters(new PerfCounter(getCounters(), name, type, -1, PERF_SAMPLE_READ, 0));
+	}
+
+	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);
+		setCounters(new PerfCounter(getCounters(), name, type, -1, PERF_SAMPLE_READ, 0));
+	}
+}
+
+bool PerfDriver::setup() {
+	// Check the kernel version
+	int release[3];
+	if (!getLinuxVersion(release)) {
+		logg->logMessage("getLinuxVersion failed");
+		return false;
+	}
+
+	if (KERNEL_VERSION(release[0], release[1], release[2]) < KERNEL_VERSION(3, 4, 0)) {
+		logg->logMessage("Unsupported kernel version");
+		return false;
+	}
+	mLegacySupport = KERNEL_VERSION(release[0], release[1], release[2]) < KERNEL_VERSION(3, 12, 0);
+
+	if (access(EVENTS_PATH, R_OK) != 0) {
+		logg->logMessage(EVENTS_PATH " does not exist, is CONFIG_TRACING and CONFIG_CONTEXT_SWITCH_TRACER enabled?");
+		return false;
+	}
+
+	// Add supported PMUs
+	bool foundCpu = false;
+	DIR *dir = opendir(PERF_DEVICES);
+	if (dir == NULL) {
+		logg->logMessage("opendir failed");
+		return false;
+	}
+
+	struct dirent *dirent;
+	while ((dirent = readdir(dir)) != NULL) {
+		for (int i = 0; i < ARRAY_LENGTH(gator_cpus); ++i) {
+			const struct gator_cpu *const gator_cpu = &gator_cpus[i];
+
+			// Do the names match exactly?
+			if (strcasecmp(gator_cpu->pmnc_name, dirent->d_name) != 0 &&
+			    // Do these names match but have the old vs new prefix?
+			    ((strncasecmp(dirent->d_name, OLD_PMU_PREFIX, sizeof(OLD_PMU_PREFIX) - 1) != 0 ||
+			      strncasecmp(gator_cpu->pmnc_name, NEW_PMU_PREFIX, sizeof(NEW_PMU_PREFIX) - 1) != 0 ||
+			      strcasecmp(dirent->d_name + sizeof(OLD_PMU_PREFIX) - 1, gator_cpu->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;
+			logg->logMessage("Adding cpu counters for %s", gator_cpu->pmnc_name);
+			addCpuCounters(gator_cpu->pmnc_name, type, gator_cpu->pmnc_counters);
+		}
+
+		for (int i = 0; i < ARRAY_LENGTH(uncore_counters); ++i) {
+			if (strcmp(dirent->d_name, uncore_counters[i].perfName) != 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;
+			}
+
+			logg->logMessage("Adding uncore counters for %s", uncore_counters[i].gatorName);
+			addUncoreCounters(uncore_counters[i].gatorName, type, uncore_counters[i].count, uncore_counters[i].hasCyclesCounter);
+		}
+	}
+	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;
+			logg->logMessage("Adding cpu counters (based on cpuid) for %s", gator_cpus[i].pmnc_name);
+			addCpuCounters(gator_cpus[i].pmnc_name, PERF_TYPE_RAW, gator_cpus[i].pmnc_counters);
+		}
+	}
+
+	if (!foundCpu) {
+		// If all else fails, use the ARM architected counters
+		logg->logMessage("Using Other cpu");
+		addCpuCounters("Other", PERF_TYPE_RAW, 6);
+	}
+
+	// Add supported software counters
+	long long id;
+	DynBuf printb;
+
+	id = getTracepointId("irq/softirq_exit", &printb);
+	if (id >= 0) {
+		setCounters(new PerfCounter(getCounters(), "Linux_irq_softirq", PERF_TYPE_TRACEPOINT, id, PERF_SAMPLE_READ, PERF_GROUP_PER_CPU | PERF_GROUP_CPU));
+	}
+
+	id = getTracepointId("irq/irq_handler_exit", &printb);
+	if (id >= 0) {
+		setCounters(new PerfCounter(getCounters(), "Linux_irq_irq", PERF_TYPE_TRACEPOINT, id, PERF_SAMPLE_READ, PERF_GROUP_PER_CPU | PERF_GROUP_CPU));
+	}
+
+	id = getTracepointId(SCHED_SWITCH, &printb);
+	if (id >= 0) {
+		setCounters(new PerfCounter(getCounters(), "Linux_sched_switch", PERF_TYPE_TRACEPOINT, id, PERF_SAMPLE_READ, PERF_GROUP_PER_CPU | PERF_GROUP_CPU));
+	}
+
+	id = getTracepointId(CPU_FREQUENCY, &printb);
+	if (id >= 0) {
+		setCounters(new CPUFreqDriver(getCounters(), id));
+	}
+
+	setCounters(new PerfCounter(getCounters(), "Linux_cpu_wait_contention", TYPE_DERIVED, -1, 0, 0));
+
+	//Linux_cpu_wait_io
+
+	mIsSetup = true;
+	return true;
+}
+
+bool PerfDriver::summary(Buffer *const buffer) {
+	struct utsname utsname;
+	if (uname(&utsname) != 0) {
+		logg->logMessage("uname failed");
+		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("clock_gettime failed");
+		return false;
+	}
+	const int64_t timestamp = (int64_t)ts.tv_sec * NS_PER_S + ts.tv_nsec;
+
+	const uint64_t monotonicStarted = getTime();
+	gSessionData->mMonotonicStarted = monotonicStarted;
+	const uint64_t currTime = 0;//getTime() - gSessionData->mMonotonicStarted;
+
+	buffer->summary(currTime, timestamp, monotonicStarted, monotonicStarted, buf);
+
+	for (int i = 0; i < gSessionData->mCores; ++i) {
+		coreName(currTime, buffer, i);
+	}
+	buffer->commit(currTime);
+
+	return true;
+}
+
+void PerfDriver::coreName(const uint64_t currTime, Buffer *const buffer, const int cpu) {
+	// Don't send information on a cpu we know nothing about
+	if (gSessionData->mCpuIds[cpu] == -1) {
+		return;
+	}
+
+	int j;
+	for (j = 0; j < ARRAY_LENGTH(gator_cpus); ++j) {
+		if (gator_cpus[j].cpuid == gSessionData->mCpuIds[cpu]) {
+			break;
+		}
+	}
+	if (j < ARRAY_LENGTH(gator_cpus) && gator_cpus[j].cpuid == gSessionData->mCpuIds[cpu]) {
+		buffer->coreName(currTime, cpu, gSessionData->mCpuIds[cpu], gator_cpus[j].core_name);
+	} else {
+		char buf[32];
+		if (gSessionData->mCpuIds[cpu] == -1) {
+			snprintf(buf, sizeof(buf), "Unknown");
+		} else {
+			snprintf(buf, sizeof(buf), "Unknown (0x%.3x)", gSessionData->mCpuIds[cpu]);
+		}
+		buffer->coreName(currTime, cpu, gSessionData->mCpuIds[cpu], buf);
+	}
+}
+
+void PerfDriver::setupCounter(Counter &counter) {
+	PerfCounter *const perfCounter = static_cast<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());
+}
+
+bool PerfDriver::enable(const uint64_t currTime, PerfGroup *const group, Buffer *const buffer) const {
+	for (PerfCounter *counter = static_cast<PerfCounter *>(getCounters()); counter != NULL; counter = static_cast<PerfCounter *>(counter->getNext())) {
+		if (counter->isEnabled() && (counter->getType() != TYPE_DERIVED)) {
+			int count = counter->getCount();
+			uint64_t sampleType = counter->getSampleType();
+			if (sampleType & PERF_SAMPLE_RAW) {
+				// If raw is enabled, every sample is needed
+				count = 1;
+			}
+			if (!group->add(currTime, buffer, counter->getKey(), counter->getType(), counter->getConfig(), count,
+					// use getCount instead of count as EBS counters need TID and IP but RAW tracepoints don't
+					(counter->getCount() > 0 ? PERF_SAMPLE_TID | PERF_SAMPLE_IP : 0) | sampleType,
+					counter->getFlags())) {
+				logg->logMessage("PerfGroup::add failed");
+				return false;
+			}
+		}
+	}
+
+	return true;
+}
+
+void PerfDriver::read(Buffer *const buffer, const int cpu) {
+	for (PerfCounter *counter = static_cast<PerfCounter *>(getCounters()); counter != NULL; counter = static_cast<PerfCounter *>(counter->getNext())) {
+		if (!counter->isEnabled()) {
+			continue;
+		}
+		counter->read(buffer, cpu);
+	}
+}
+
+long long PerfDriver::getTracepointId(const char *const name, DynBuf *const printb) {
+	if (!printb->printf(EVENTS_PATH "/%s/id", name)) {
+		logg->logMessage("DynBuf::printf failed");
+		return -1;
+	}
+
+	int64_t result;
+	if (DriverSource::readInt64Driver(printb->getBuf(), &result) != 0) {
+		logg->logMessage("DriverSource::readInt64Driver failed");
+		return -1;
+	}
+
+	return result;
+}