pixelatom: implement atom log function for long irq atom

Implement log function for long irq metrics atom

Bug: 227809911
Bug: 232541623
Test: Verified the existence of atom and correctness of atom stats
adb shell
cmd stats print-logs && logcat -b all | grep -i 105043
Signed-off-by: Ziyi Cui <ziyic@google.com>
Merged-In: I2fffd36772dda1e590a09f8d8fcaf3164f74aafb
Change-Id: I2fffd36772dda1e590a09f8d8fcaf3164f74aafb
(cherry picked from commit 10613eb0db34072c38078d4fb73a3f1e979d24af)

2 files changed, 137 insertions, 1 deletions

diff --git a/pixelstats/SysfsCollector.cpp b/pixelstats/SysfsCollector.cpp
index 3223f64..698644f 100644
--- a/pixelstats/SysfsCollector.cpp
+++ b/pixelstats/SysfsCollector.cpp
@@ -55,6 +55,7 @@ using android::hardware::google::pixel::PixelAtoms::ThermalDfsStats;
 using android::hardware::google::pixel::PixelAtoms::VendorAudioHardwareStatsReported;
 using android::hardware::google::pixel::PixelAtoms::VendorChargeCycles;
 using android::hardware::google::pixel::PixelAtoms::VendorHardwareFailed;
+using android::hardware::google::pixel::PixelAtoms::VendorLongIRQStatsReported;
 using android::hardware::google::pixel::PixelAtoms::VendorSlowIo;
 using android::hardware::google::pixel::PixelAtoms::VendorSpeakerImpedance;
 using android::hardware::google::pixel::PixelAtoms::VendorSpeakerStatsReported;
@@ -91,7 +92,8 @@ SysfsCollector::SysfsCollector(const struct SysfsPaths &sysfs_paths)
       kAmsRatePath(sysfs_paths.AmsRatePath),
       kThermalStatsPaths(sysfs_paths.ThermalStatsPaths),
       kCCARatePath(sysfs_paths.CCARatePath),
-      kTempResidencyPath(sysfs_paths.TempResidencyPath) {}
+      kTempResidencyPath(sysfs_paths.TempResidencyPath),
+      kLongIRQMetricsPath(sysfs_paths.LongIRQMetricsPath) {}
 
 bool SysfsCollector::ReadFileToInt(const std::string &path, int *val) {
     return ReadFileToInt(path.c_str(), val);
@@ -1050,6 +1052,131 @@ void SysfsCollector::logVendorAudioHardwareStats(const std::shared_ptr<IStats> &
         ALOGE("Unable to report VendorAudioHardwareStatsReported to Stats service");
 }
 
+bool cmp(const std::pair<int, int64_t> &a, const std::pair<int, int64_t> &b) {
+    return a.second > b.second;
+}
+
+/**
+ * Sort irq stats by irq latency, and load top 5 irq stats.
+ */
+void process_irqatom_values(std::vector<std::pair<int, int64_t>> sorted_pair,
+                            std::vector<VendorAtomValue> *values) {
+    VendorAtomValue tmp;
+    sort(sorted_pair.begin(), sorted_pair.end(), cmp);
+    int irq_stats_size = sorted_pair.size();
+    for (int i = 0; i < 5; i++) {
+        if (irq_stats_size < 5 && i >= irq_stats_size) {
+            tmp.set<VendorAtomValue::longValue>(-1);
+            values->push_back(tmp);
+            tmp.set<VendorAtomValue::longValue>(0);
+            values->push_back(tmp);
+        } else {
+            tmp.set<VendorAtomValue::longValue>(sorted_pair[i].first);
+            values->push_back(tmp);
+            tmp.set<VendorAtomValue::longValue>(sorted_pair[i].second);
+            values->push_back(tmp);
+        }
+    }
+}
+
+/**
+ * Logs the Long irq stats.
+ */
+void SysfsCollector::logVendorLongIRQStatsReported(const std::shared_ptr<IStats> &stats_client) {
+    std::string file_contents;
+    if (!kLongIRQMetricsPath) {
+        ALOGV("LongIRQ path not specified");
+        return;
+    }
+    if (!ReadFileToString(kLongIRQMetricsPath, &file_contents)) {
+        ALOGE("Unable to LongIRQ %s - %s", kLongIRQMetricsPath, strerror(errno));
+        return;
+    }
+    int offset = 0;
+    int bytes_read;
+    const char *data = file_contents.c_str();
+    int data_len = file_contents.length();
+    //  Get, process, store softirq stats
+    std::vector<std::pair<int, int64_t>> sorted_softirq_pair;
+    int64_t softirq_count;
+    if (sscanf(data + offset, "long SOFTIRQ count: %ld\n%n", &softirq_count, &bytes_read) != 1)
+        return;
+    offset += bytes_read;
+    if (offset >= data_len)
+        return;
+    std::vector<VendorAtomValue> values;
+    VendorAtomValue tmp;
+    if (softirq_count - prev_data.softirq_count < 0) {
+        tmp.set<VendorAtomValue::intValue>(-1);
+        ALOGI("long softirq count get overflow");
+    } else {
+        tmp.set<VendorAtomValue::longValue>(softirq_count - prev_data.softirq_count);
+    }
+    values.push_back(tmp);
+
+    if (sscanf(data + offset, "long SOFTIRQ detail (num, latency):\n%n", &bytes_read) != 0)
+        return;
+    offset += bytes_read;
+    if (offset >= data_len)
+        return;
+
+    //  Iterate over softirq stats and record top 5 long softirq
+    int64_t softirq_latency;
+    int softirq_num;
+    while (sscanf(data + offset, "%d %ld\n%n", &softirq_num, &softirq_latency, &bytes_read) == 2) {
+        sorted_softirq_pair.push_back(std::make_pair(softirq_num, softirq_latency));
+        offset += bytes_read;
+        if (offset >= data_len)
+            return;
+    }
+    process_irqatom_values(sorted_softirq_pair, &values);
+
+    //  Get, process, store irq stats
+    std::vector<std::pair<int, int64_t>> sorted_irq_pair;
+    int64_t irq_count;
+    if (sscanf(data + offset, "long IRQ count: %ld\n%n", &irq_count, &bytes_read) != 1)
+        return;
+    offset += bytes_read;
+    if (offset >= data_len)
+        return;
+    if (irq_count - prev_data.irq_count < 0) {
+        tmp.set<VendorAtomValue::intValue>(-1);
+        ALOGI("long irq count get overflow");
+    } else {
+        tmp.set<VendorAtomValue::longValue>(irq_count - prev_data.irq_count);
+    }
+    values.push_back(tmp);
+
+    if (sscanf(data + offset, "long IRQ detail (num, latency):\n%n", &bytes_read) != 0)
+        return;
+    offset += bytes_read;
+    if (offset >= data_len)
+        return;
+
+    int64_t irq_latency;
+    int irq_num;
+    int index = 0;
+    //  Iterate over softirq stats and record top 5 long irq
+    while (sscanf(data + offset, "%d %ld\n%n", &irq_num, &irq_latency, &bytes_read) == 2) {
+        sorted_irq_pair.push_back(std::make_pair(irq_num, irq_latency));
+        offset += bytes_read;
+        if (offset >= data_len && index < 5)
+            return;
+        index += 1;
+    }
+    process_irqatom_values(sorted_irq_pair, &values);
+
+    prev_data.softirq_count = softirq_count;
+    prev_data.irq_count = irq_count;
+    // Send vendor atom to IStats HAL
+    VendorAtom event = {.reverseDomainName = "",
+                        .atomId = PixelAtoms::Atom::kVendorLongIrqStatsReported,
+                        .values = std::move(values)};
+    const ndk::ScopedAStatus ret = stats_client->reportVendorAtom(event);
+    if (!ret.isOk())
+        ALOGE("Unable to report kVendorLongIRQStatsReported to Stats service");
+}
+
 void SysfsCollector::logPerDay() {
     const std::shared_ptr<IStats> stats_client = getStatsService();
     if (!stats_client) {
@@ -1082,6 +1209,7 @@ void SysfsCollector::logPerDay() {
     logVendorAudioHardwareStats(stats_client);
     logThermalStats(stats_client);
     logTempResidencyStats(stats_client);
+    logVendorLongIRQStatsReported(stats_client);
 }
 
 void SysfsCollector::aggregatePer5Min() {
diff --git a/pixelstats/include/pixelstats/SysfsCollector.h b/pixelstats/include/pixelstats/SysfsCollector.h
index 8ee1ec6..e0aef81 100644
--- a/pixelstats/include/pixelstats/SysfsCollector.h
+++ b/pixelstats/include/pixelstats/SysfsCollector.h
@@ -67,6 +67,7 @@ class SysfsCollector {
         const std::vector<std::string> ThermalStatsPaths;
         const char *const CCARatePath;
         const char *const TempResidencyPath;
+        const char *const LongIRQMetricsPath;
     };
 
     SysfsCollector(const struct SysfsPaths &paths);
@@ -107,6 +108,7 @@ class SysfsCollector {
     void reportZramBdStat(const std::shared_ptr<IStats> &stats_client);
     int getReclaimedSegments(const std::string &mode);
     void logVendorAudioHardwareStats(const std::shared_ptr<IStats> &stats_client);
+    void logVendorLongIRQStatsReported(const std::shared_ptr<IStats> &stats_client);
 
     const char *const kSlowioReadCntPath;
     const char *const kSlowioWriteCntPath;
@@ -136,6 +138,7 @@ class SysfsCollector {
     const std::vector<std::string> kThermalStatsPaths;
     const char *const kCCARatePath;
     const char *const kTempResidencyPath;
+    const char *const kLongIRQMetricsPath;
 
     BatteryEEPROMReporter battery_EEPROM_reporter_;
     MmMetricsReporter mm_metrics_reporter_;
@@ -150,6 +153,11 @@ class SysfsCollector {
 
     bool log_once_reported = false;
     int64_t prev_huge_pages_since_boot_ = -1;
+    struct perf_metrics_data {
+        int64_t softirq_count;
+        int64_t irq_count;
+    };
+    struct perf_metrics_data prev_data;
 };
 
 }  // namespace pixel