am c5482138: am ea56594c: Merge "logd: sizes > 1M prune in smaller batches"

}

// 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);

    }