Merge "Add shard ID to statsd atom for procstats collection" into rvc-dev am: b0f26f32

 */

message ProcStats {

    optional ProcessStatsSectionProto proc_stats_section = 1;

    // Data pulled from device into this is sometimes sharded across multiple atoms to work around

    // a size limit. When this happens, this shard ID will contain an increasing 1-indexed integer

    // with the number of this shard.

    optional int32 shard_id = 2;

}

/**

                    lastHighWaterMark, section, true, statsFiles, procStats);

            procStats.dumpAggregatedProtoForStatsd(protoStreams, MAX_PROCSTATS_RAW_SHARD_SIZE);

            for (ProtoOutputStream proto : protoStreams) {

                if (proto.getBytes().length > 0) {

            for (int i = 0; i < protoStreams.length; i++) {

                byte[] bytes = protoStreams[i].getBytes(); // cache the value

                if (bytes.length > 0) {

                    StatsEvent e = StatsEvent.newBuilder()

                            .setAtomId(atomTag)

                            .writeByteArray(proto.getBytes())

                            .writeByteArray(bytes)

                            // This is a shard ID, and is specified in the metric definition to be

                            // a dimension. This will result in statsd using RANDOM_ONE_SAMPLE to

                            // keep all the shards, as it thinks each shard is a different dimension

                            // of data.

                            .writeInt(i)

                            .build();

                    pulledData.add(e);

                }