On Sat, Jun 9, 2012 at 3:07 PM, Yue Chen <[email protected]> wrote: > Thanks for replying. Do you know any easy way to do that?
See for example commit 870be6ad57d38dd630c5d5ac7e01fc5d8b784485. Please don't top post. > > > On Sat, Jun 9, 2012 at 11:02 AM, Blue Swirl <[email protected]> wrote: >> >> On Sat, Jun 9, 2012 at 2:37 PM, Yue Chen <[email protected]> wrote: >> > Hi, Guy, >> > >> > When I use "log cpu" or "log exec" in the system "-monitor stdio" mode, >> > it's >> > extremely slow(lose my mouse/keyboard control). I used a buffer instead >> > of >> > directly writing log to disk, but even slower. When I give a large >> > memory >> > ("-m 4G") to VM, or set the process priority(chrt -f 99) of QEMU, the >> > situation is the same. Any approach to speed up logging? (let me be able >> > to >> > control the VM when logging.) Thanks. >> >> The performance is slow because logging is text based and therefore >> there is a lot of processing and I/O. >> >> Log users should be converted to trace points which use binary data, >> that would be much faster and more efficient. > >
