On Thu, Jun 28, 2018 at 1:08 AM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > On Tue, 26 Jun 2018 15:15:10 +0200 Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: >> ====== Benchmarks >> >> The following numbers were collected on Odroid C2 board. Both KASAN and >> KHWASAN were used in inline instrumentation mode. >> >> Boot time [1]: >> * ~1.7 sec for clean kernel >> * ~5.0 sec for KASAN >> * ~5.0 sec for KHWASAN >> >> 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?
