On 19/02/2016 09:26, Kengo NAKAHARA wrote: > According to my measurements of using DTrace, there is a certain > overhead between kern_malloc() and pool_cache_get(). Here is each > function's average turnaround times in my measurement. > > m_tag_get | 124205 [ns] > kern_malloc | 108007 [ns] > kmem_intr_alloc | 89636 [ns] > pool_cache_get_paddr | 65942 [ns]
... > Here is the patch to introduce mbuf pool cache. > http://www.netbsd.org/~knakahara/mtag-pool-cache/mtag-pool-cache.patch > > Could you comment this patch? Any comments are welcome. And the equivalent numbers with the patch? As I assume the patch is an optimisation, a suitable speed bump is expected :) Roy
