2015-01-10 1:45 GMT+09:00 Luigi Semenzato <semenzato@xxxxxxxxxx>: > On Thu, Jan 8, 2015 at 10:30 PM, Andrew Morton > <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: >> On Thu, 8 Jan 2015 14:49:45 -0800 Luigi Semenzato <semenzato@xxxxxxxxxx> wrote: >> >>> I am taking a closer look at the performance of the Linux MM in the >>> context of heavy zram usage. The bottom line is that there is >>> surprisingly high overhead (35-40%) from MM code other than >>> compression/decompression routines. >> >> Those images hurt my eyes. > > Sorry about that. I didn't find other ways of computing the > cumulative cost of functions (i.e. time spent in a function and all > its descendants, like in gprof). I couldn't get perf to do that > either. A flat profile shows most functions take a fracion of 1%, so > it's not useful. If anybody knows a better way I'll be glad to use > it. Hello, Recent version of perf has an ability to compute cumulative cost of functions. And, it's a default configuration. :) If you change your perf to recent version, you can easily get the data. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>