Hi Roy, My suggestion is to collect information from the jbd2_run_stats and jbd2_checkpoint_stats tracepoints. cd /sys/kernel/debug/tracing echo 1 > events/jbd2/jbd2_run_stats/enable echo 1 > events/jbd2/jbd2_checkpoint_stats/enable cat trace_pipe > /tmp/traces & tail -f /tmp/traces The jbd2_handle_stats tracepoint can be informative, but it's also far more voluminous. That will give us a hint where things are getting bottlenecked. What sort of workload is your application doing? Is it just primarily doing random writes into a preallocated file? Is it creating or deleting files? Extending or truncating files? etc. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
