On Thu, 28 Jun 2018 20:29:07 +0200 Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > >> Slab memory usage after boot [2]: > >> * ~40 kb for clean kernel > >> * ~105 kb + 1/8th shadow ~= 118 kb for KASAN > >> * ~47 kb + 1/16th shadow ~= 50 kb for KHWASAN > >> > >> Network performance [3]: > >> * 8.33 Gbits/sec for clean kernel > >> * 3.17 Gbits/sec for KASAN > >> * 2.85 Gbits/sec for KHWASAN > >> > >> Note, that KHWASAN (compared to KASAN) doesn't require quarantine. > >> > >> [1] Time before the ext4 driver is initialized. > >> [2] Measured as `cat /proc/meminfo | grep Slab`. > >> [3] Measured as `iperf -s & iperf -c 127.0.0.1 -t 30`. > > > > The above doesn't actually demonstrate the whole point of the > > patchset: to reduce KASAN's very high memory consumption? > > You mean that memory usage numbers collected after boot don't give a > representative picture of actual memory consumption on real workloads? > > What kind of memory consumption testing would you like to see? Well, 100kb or so is a teeny amount on virtually any machine. I'm assuming the savings are (much) more significant once the machine gets loaded up and doing work?
