Hi, I am writing a block IO latency tracker.
As obvious, I am calculating the latency by tracking the interval between start of IO and end of IO. (firing my latency tracker from function BlockDriverAIOCB *raw_aio_submit() raw-posix.c when job is submitted). The latency data per QEMU process will be written to shared memory and then another app uses this shared memory to read the data. That's a simple architecture. Can't use "info blockstats" QMP command as qmp socket is used and blocked by some other process in our subsystem. Just want a suggestion whether my approach is correct given the constraint that I can't use qmp socket or if any alternative is possible. Thanks Anshul Makkar www.justkernel.com
