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-rw-r--r--logd/LogBuffer.cpp33
-rw-r--r--logd/LogBuffer.h9
-rw-r--r--logd/LogStatistics.cpp107
-rw-r--r--logd/LogStatistics.h14
-rw-r--r--logd/README.property3
-rw-r--r--logd/main.cpp9
6 files changed, 106 insertions, 69 deletions
diff --git a/logd/LogBuffer.cpp b/logd/LogBuffer.cpp
index cd9ea20..8c1c344 100644
--- a/logd/LogBuffer.cpp
+++ b/logd/LogBuffer.cpp
@@ -93,9 +93,9 @@ static unsigned long property_get_size(const char *key) {
}
LogBuffer::LogBuffer(LastLogTimes *times)
- : mTimes(*times) {
+ : dgramQlenStatistics(false)
+ , mTimes(*times) {
pthread_mutex_init(&mLogElementsLock, NULL);
- dgram_qlen_statistics = false;
static const char global_tuneable[] = "persist.logd.size"; // Settings App
static const char global_default[] = "ro.logd.size"; // BoardConfig.mk
@@ -150,10 +150,10 @@ void LogBuffer::log(log_id_t log_id, log_time realtime,
while (--it != mLogElements.begin()) {
if ((*it)->getRealTime() <= realtime) {
// halves the peak performance, use with caution
- if (dgram_qlen_statistics) {
+ if (dgramQlenStatistics) {
LogBufferElementCollection::iterator ib = it;
unsigned short buckets, num = 1;
- for (unsigned short i = 0; (buckets = stats.dgram_qlen(i)); ++i) {
+ for (unsigned short i = 0; (buckets = stats.dgramQlen(i)); ++i) {
buckets -= num;
num += buckets;
while (buckets && (--ib != mLogElements.begin())) {
@@ -267,8 +267,7 @@ void LogBuffer::prune(log_id_t id, unsigned long pruneRows, uid_t caller_uid) {
if (uid == caller_uid) {
it = mLogElements.erase(it);
- unsigned short len = e->getMsgLen();
- stats.subtract(len, id, uid, e->getPid());
+ stats.subtract(e->getMsgLen(), id, uid, e->getPid());
delete e;
pruneRows--;
if (pruneRows == 0) {
@@ -318,23 +317,19 @@ void LogBuffer::prune(log_id_t id, unsigned long pruneRows, uid_t caller_uid) {
uid_t uid = e->getUid();
- if (uid == worst) {
+ if ((uid == worst) || mPrune.naughty(e)) { // Worst or BlackListed
it = mLogElements.erase(it);
unsigned short len = e->getMsgLen();
- stats.subtract(len, id, worst, e->getPid());
- delete e;
- kick = true;
- pruneRows--;
- if ((pruneRows == 0) || (worst_sizes < second_worst_sizes)) {
- break;
- }
- worst_sizes -= len;
- } else if (mPrune.naughty(e)) { // BlackListed
- it = mLogElements.erase(it);
- stats.subtract(e->getMsgLen(), id, uid, e->getPid());
+ stats.subtract(len, id, uid, e->getPid());
delete e;
pruneRows--;
- if (pruneRows == 0) {
+ if (uid == worst) {
+ kick = true;
+ if ((pruneRows == 0) || (worst_sizes < second_worst_sizes)) {
+ break;
+ }
+ worst_sizes -= len;
+ } else if (pruneRows == 0) {
break;
}
} else {
diff --git a/logd/LogBuffer.h b/logd/LogBuffer.h
index 4b982a8..879baea 100644
--- a/logd/LogBuffer.h
+++ b/logd/LogBuffer.h
@@ -37,8 +37,7 @@ class LogBuffer {
pthread_mutex_t mLogElementsLock;
LogStatistics stats;
-
- bool dgram_qlen_statistics;
+ bool dgramQlenStatistics;
PruneList mPrune;
@@ -66,7 +65,11 @@ public:
void enableDgramQlenStatistics() {
stats.enableDgramQlenStatistics();
- dgram_qlen_statistics = true;
+ dgramQlenStatistics = true;
+ }
+
+ void enableStatistics() {
+ stats.enableStatistics();
}
int initPrune(char *cp) { return mPrune.init(cp); }
diff --git a/logd/LogStatistics.cpp b/logd/LogStatistics.cpp
index 82f9165..6f3a088 100644
--- a/logd/LogStatistics.cpp
+++ b/logd/LogStatistics.cpp
@@ -51,11 +51,11 @@ PidStatistics::~PidStatistics() {
}
bool PidStatistics::pidGone() {
- if (mGone) {
+ if (mGone || (pid == gone)) {
return true;
}
- if (pid == gone) {
- return true;
+ if (pid == 0) {
+ return false;
}
if (kill(pid, 0) && (errno != EPERM)) {
mGone = true;
@@ -90,9 +90,14 @@ void PidStatistics::addTotal(size_t size, size_t element) {
}
// must call free to release return value
+// If only we could sniff our own logs for:
+// <time> <pid> <pid> E AndroidRuntime: Process: <name>, PID: <pid>
+// which debuggerd prints as a process is crashing.
char *PidStatistics::pidToName(pid_t pid) {
char *retval = NULL;
- if (pid != gone) {
+ if (pid == 0) { // special case from auditd for kernel
+ retval = strdup("logd.auditd");
+ } else if (pid != gone) {
char buffer[512];
snprintf(buffer, sizeof(buffer), "/proc/%u/cmdline", pid);
int fd = open(buffer, O_RDONLY);
@@ -122,7 +127,7 @@ UidStatistics::~UidStatistics() {
PidStatisticsCollection::iterator it;
for (it = begin(); it != end();) {
delete (*it);
- it = Pids.erase(it);
+ it = erase(it);
}
}
@@ -130,7 +135,7 @@ void UidStatistics::add(unsigned short size, pid_t pid) {
mSizes += size;
++mElements;
- PidStatistics *p;
+ PidStatistics *p = NULL;
PidStatisticsCollection::iterator last;
PidStatisticsCollection::iterator it;
for (last = it = begin(); it != end(); last = it, ++it) {
@@ -141,12 +146,12 @@ void UidStatistics::add(unsigned short size, pid_t pid) {
}
}
// insert if the gone entry.
- bool insert = (last != it) && (p->getPid() == p->gone);
+ bool insert_before_last = (last != it) && p && (p->getPid() == p->gone);
p = new PidStatistics(pid, pidToName(pid));
- if (insert) {
- Pids.insert(last, p);
+ if (insert_before_last) {
+ insert(last, p);
} else {
- Pids.push_back(p);
+ push_back(p);
}
p->add(size);
}
@@ -163,17 +168,17 @@ void UidStatistics::subtract(unsigned short size, pid_t pid) {
size_t szsTotal = p->sizesTotal();
size_t elsTotal = p->elementsTotal();
delete p;
- Pids.erase(it);
+ erase(it);
it = end();
--it;
if (it == end()) {
p = new PidStatistics(p->gone);
- Pids.push_back(p);
+ push_back(p);
} else {
p = *it;
if (p->getPid() != p->gone) {
p = new PidStatistics(p->gone);
- Pids.push_back(p);
+ push_back(p);
}
}
p->addTotal(szsTotal, elsTotal);
@@ -194,8 +199,8 @@ void UidStatistics::sort() {
PidStatistics *n = (*it);
if ((n->getPid() != n->gone) && (n->sizes() > l->sizes())) {
pass = true;
- Pids.erase(it);
- Pids.insert(lt, n);
+ erase(it);
+ insert(lt, n);
it = lt;
n = l;
}
@@ -302,6 +307,10 @@ void LidStatistics::add(unsigned short size, uid_t uid, pid_t pid) {
}
void LidStatistics::subtract(unsigned short size, uid_t uid, pid_t pid) {
+ if (uid == (uid_t) -1) { // init
+ uid = (uid_t) AID_ROOT;
+ }
+
UidStatisticsCollection::iterator it;
for (it = begin(); it != end(); ++it) {
UidStatistics *u = *it;
@@ -384,24 +393,25 @@ size_t LidStatistics::elementsTotal(uid_t uid, pid_t pid) {
}
LogStatistics::LogStatistics()
- : start(CLOCK_MONOTONIC) {
+ : mStatistics(false)
+ , dgramQlenStatistics(false)
+ , start(CLOCK_MONOTONIC) {
log_id_for_each(i) {
mSizes[i] = 0;
mElements[i] = 0;
}
- dgram_qlen_statistics = false;
- for(unsigned short bucket = 0; dgram_qlen(bucket); ++bucket) {
+ for(unsigned short bucket = 0; dgramQlen(bucket); ++bucket) {
mMinimum[bucket].tv_sec = mMinimum[bucket].tv_sec_max;
mMinimum[bucket].tv_nsec = mMinimum[bucket].tv_nsec_max;
}
}
-// Each bucket below represents a dgram_qlen of log messages. By
+// Each bucket below represents a dgramQlen of log messages. By
// finding the minimum period of time from start to finish
-// of each dgram_qlen, we can get a performance expectation for
+// of each dgramQlen, we can get a performance expectation for
// the user space logger. The net result is that the period
-// of time divided by the dgram_qlen will give us the average time
+// of time divided by the dgramQlen will give us the average time
// between log messages; at the point where the average time
// is greater than the throughput capability of the logger
// we will not longer require the benefits of the FIFO formed
@@ -412,7 +422,7 @@ LogStatistics::LogStatistics()
//
// for example (reformatted):
//
-// Minimum time between log events per dgram_qlen:
+// Minimum time between log events per dgramQlen:
// 1 2 3 5 10 20 30 50 100 200 300 400 500 600
// 5u2 12u 13u 15u 16u 27u 30u 36u 407u 3m1 3m3 3m9 3m9 5m5
//
@@ -426,12 +436,12 @@ LogStatistics::LogStatistics()
// a large engineering margin so the rule of thumb that lead us to 100 is
// fine.
//
-// bucket dgram_qlen are tuned for /proc/sys/net/unix/max_dgram_qlen = 300
+// bucket dgramQlen are tuned for /proc/sys/net/unix/max_dgram_qlen = 300
const unsigned short LogStatistics::mBuckets[] = {
1, 2, 3, 5, 10, 20, 30, 50, 100, 200, 300, 400, 500, 600
};
-unsigned short LogStatistics::dgram_qlen(unsigned short bucket) {
+unsigned short LogStatistics::dgramQlen(unsigned short bucket) {
if (bucket >= sizeof(mBuckets) / sizeof(mBuckets[0])) {
return 0;
}
@@ -455,6 +465,9 @@ void LogStatistics::add(unsigned short size,
log_id_t log_id, uid_t uid, pid_t pid) {
mSizes[log_id] += size;
++mElements[log_id];
+ if (!mStatistics) {
+ return;
+ }
id(log_id).add(size, uid, pid);
}
@@ -462,6 +475,9 @@ void LogStatistics::subtract(unsigned short size,
log_id_t log_id, uid_t uid, pid_t pid) {
mSizes[log_id] -= size;
--mElements[log_id];
+ if (!mStatistics) {
+ return;
+ }
id(log_id).subtract(size, uid, pid);
}
@@ -545,25 +561,28 @@ void LogStatistics::format(char **buf,
spaces = 1;
log_time t(CLOCK_MONOTONIC);
- unsigned long long d = t.nsec() - start.nsec();
- string.appendFormat("\nTotal%4llu:%02llu:%02llu.%09llu",
+ unsigned long long d;
+ if (mStatistics) {
+ d = t.nsec() - start.nsec();
+ string.appendFormat("\nTotal%4llu:%02llu:%02llu.%09llu",
d / NS_PER_SEC / 60 / 60, (d / NS_PER_SEC / 60) % 60,
(d / NS_PER_SEC) % 60, d % NS_PER_SEC);
- log_id_for_each(i) {
- if (!(logMask & (1 << i))) {
- continue;
- }
- oldLength = string.length();
- if (spaces < 0) {
- spaces = 0;
+ log_id_for_each(i) {
+ if (!(logMask & (1 << i))) {
+ continue;
+ }
+ oldLength = string.length();
+ if (spaces < 0) {
+ spaces = 0;
+ }
+ string.appendFormat("%*s%zu/%zu", spaces, "",
+ sizesTotal(i), elementsTotal(i));
+ spaces += spaces_total + oldLength - string.length();
}
- string.appendFormat("%*s%zu/%zu", spaces, "",
- sizesTotal(i), elementsTotal(i));
- spaces += spaces_total + oldLength - string.length();
+ spaces = 1;
}
- spaces = 1;
d = t.nsec() - oldest.nsec();
string.appendFormat("\nNow%6llu:%02llu:%02llu.%09llu",
d / NS_PER_SEC / 60 / 60, (d / NS_PER_SEC / 60) % 60,
@@ -689,23 +708,23 @@ void LogStatistics::format(char **buf,
pids.clear();
}
- if (dgram_qlen_statistics) {
+ if (dgramQlenStatistics) {
const unsigned short spaces_time = 6;
const unsigned long long max_seconds = 100000;
spaces = 0;
- string.append("\n\nMinimum time between log events per dgram_qlen:\n");
- for(unsigned short i = 0; dgram_qlen(i); ++i) {
+ string.append("\n\nMinimum time between log events per max_dgram_qlen:\n");
+ for(unsigned short i = 0; dgramQlen(i); ++i) {
oldLength = string.length();
if (spaces < 0) {
spaces = 0;
}
- string.appendFormat("%*s%u", spaces, "", dgram_qlen(i));
+ string.appendFormat("%*s%u", spaces, "", dgramQlen(i));
spaces += spaces_time + oldLength - string.length();
}
string.append("\n");
spaces = 0;
unsigned short n;
- for(unsigned short i = 0; (n = dgram_qlen(i)); ++i) {
+ for(unsigned short i = 0; (n = dgramQlen(i)); ++i) {
unsigned long long duration = minimum(i);
if (duration) {
duration /= n;
@@ -727,8 +746,8 @@ void LogStatistics::format(char **buf,
/ (NS_PER_SEC / 1000));
} else if (duration >= (NS_PER_SEC / (1000000 / 10))) {
string.appendFormat("%lluu",
- (duration + (NS_PER_SEC / 2 / 1000000))
- / (NS_PER_SEC / 1000000));
+ (duration + (NS_PER_SEC / 2 / 1000000))
+ / (NS_PER_SEC / 1000000));
} else {
string.appendFormat("%llun", duration);
}
diff --git a/logd/LogStatistics.h b/logd/LogStatistics.h
index 3733137..f6c4329 100644
--- a/logd/LogStatistics.h
+++ b/logd/LogStatistics.h
@@ -72,6 +72,10 @@ class UidStatistics {
PidStatisticsCollection Pids;
+ void insert(PidStatisticsCollection::iterator i, PidStatistics *p)
+ { Pids.insert(i, p); }
+ void push_back(PidStatistics *p) { Pids.push_back(p); }
+
size_t mSizes;
size_t mElements;
@@ -81,6 +85,8 @@ public:
PidStatisticsCollection::iterator begin() { return Pids.begin(); }
PidStatisticsCollection::iterator end() { return Pids.end(); }
+ PidStatisticsCollection::iterator erase(PidStatisticsCollection::iterator i)
+ { return Pids.erase(i); }
uid_t getUid() { return uid; }
@@ -138,7 +144,8 @@ class LogStatistics {
size_t mSizes[LOG_ID_MAX];
size_t mElements[LOG_ID_MAX];
- bool dgram_qlen_statistics;
+ bool mStatistics;
+ bool dgramQlenStatistics;
static const unsigned short mBuckets[14];
log_time mMinimum[sizeof(mBuckets) / sizeof(mBuckets[0])];
@@ -150,8 +157,9 @@ public:
LidStatistics &id(log_id_t log_id) { return LogIds[log_id]; }
- void enableDgramQlenStatistics() { dgram_qlen_statistics = true; }
- static unsigned short dgram_qlen(unsigned short bucket);
+ void enableDgramQlenStatistics() { dgramQlenStatistics = true; }
+ void enableStatistics() { mStatistics = true; }
+ static unsigned short dgramQlen(unsigned short bucket);
unsigned long long minimum(unsigned short bucket);
void recordDiff(log_time diff, unsigned short bucket);
diff --git a/logd/README.property b/logd/README.property
index f4b3c3c..b7fcece 100644
--- a/logd/README.property
+++ b/logd/README.property
@@ -4,6 +4,9 @@ name type default description
logd.auditd bool true Enable selinux audit daemon
logd.auditd.dmesg bool true selinux audit messages duplicated and
sent on to dmesg log
+logd.statistics bool depends Enable logcat -S statistics.
+ro.config.low_ram bool false if true, logd.statistics default false
+ro.build.type string if user, logd.statistics default false
logd.statistics.dgram_qlen bool false Record dgram_qlen statistics. This
represents a performance impact and
is used to determine the platform's
diff --git a/logd/main.cpp b/logd/main.cpp
index 1e1a718..54da7e3 100644
--- a/logd/main.cpp
+++ b/logd/main.cpp
@@ -152,6 +152,15 @@ int main() {
if (property_get_bool("logd.statistics.dgram_qlen", false)) {
logBuf->enableDgramQlenStatistics();
}
+ {
+ char property[PROPERTY_VALUE_MAX];
+ property_get("ro.build.type", property, "");
+ if (property_get_bool("logd.statistics",
+ !!strcmp(property, "user")
+ && !property_get_bool("ro.config.low_ram", false))) {
+ logBuf->enableStatistics();
+ }
+ }
// LogReader listens on /dev/socket/logdr. When a client
// connects, log entries in the LogBuffer are written to the client.
generated by cgit v1.1 at 2025-05-14 12:58:26 +0000