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am 3e57869c: Merge "logd: fix persistent blocking reader performance" 

* commit '3e57869cccf89fc6f700e61fd13049a17a57637a':
  logd: fix persistent blocking reader performance
This commit is contained in:
Mark Salyzyn 2015-01-24 00:31:04 +00:00 committed by Android Git Automerger
parent 982421df45 3e57869ccc
commit 49f38385c9
1 changed files with 18 additions and 1 deletions
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19
logd/LogBuffer.cpp
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@ -445,7 +445,24 @@ log_time LogBuffer::flushTo(
uid_t uid = reader->getUid();
pthread_mutex_lock(&mLogElementsLock);
for (it = mLogElements.begin(); it != mLogElements.end(); ++it) {
if (start == LogTimeEntry::EPOCH) {
// client wants to start from the beginning
it = mLogElements.begin();
} else {
// Client wants to start from some specified time. Chances are
// we are better off starting from the end of the time sorted list.
for (it = mLogElements.end(); it != mLogElements.begin(); /* do nothing */) {
--it;
LogBufferElement *element = *it;
if (element->getMonotonicTime() <= start) {
it++;
break;
}
}
}
for (; it != mLogElements.end(); ++it) {
LogBufferElement *element = *it;
if (!privileged && (element->getUid() != uid)) {