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logd: sizes > 1M prune in smaller batches 

Switch to 1% batch sizes from 10% when individual buffer size > 1M

Bug: 22351810
Change-Id: Ifee570a54643ceb0ba767e1787e937f70cc90b72
This commit is contained in:
Mark Salyzyn 2015-08-10 10:23:56 -07:00
parent 7989a7c8d3
commit 62ab0fd4ef
1 changed files with 15 additions and 8 deletions
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23
logd/LogBuffer.cpp
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@ -218,18 +218,25 @@ int LogBuffer::log(log_id_t log_id, log_time realtime,
}
// If we're using more than 256K of memory for log entries, prune
// at least 10% of the log entries.
// at least 10% of the log entries. For sizes above 1M, prune at
// least 1% of the log entries.
//
// mLogElementsLock must be held when this function is called.
void LogBuffer::maybePrune(log_id_t id) {
size_t sizes = stats.sizes(id);
if (sizes > log_buffer_size(id)) {
size_t sizeOver90Percent = sizes - ((log_buffer_size(id) * 9) / 10);
size_t elements = stats.elements(id);
unsigned long pruneRows = elements * sizeOver90Percent / sizes;
elements /= 10;
if (pruneRows <= elements) {
pruneRows = elements;
unsigned long maxSize = log_buffer_size(id);
if (sizes > maxSize) {
size_t sizeOver, minElements, elements = stats.elements(id);
if (maxSize > (4 * LOG_BUFFER_SIZE)) {
sizeOver = sizes - ((maxSize * 99) / 100);
minElements = elements / 100;
} else {
sizeOver = sizes - ((maxSize * 9) / 10);
minElements = elements / 10;
}
unsigned long pruneRows = elements * sizeOver / sizes;
if (pruneRows <= minElements) {
pruneRows = minElements;
}
prune(id, pruneRows);
}