New structure ocf_part is added to contain all the data common for both
user partitions and freelist partition: part_runtime and part_id.
ocf_user_part now contains ocf_part structure as well as pointer to
cleaning partition runtime metadata (moved out from part_runtime) and
user partition config (no change here).
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
Eviction changes allowing to evict (remap) cachelines while
holding hash bucket write lock instead of global metadata
write lock.
As eviction (replacement) is now tightly coupled with request,
each request uses eviction size equal to number of its
unmapped cachelines.
Evicting without global metadata write lock is possible
thanks to the fact that remaping is always performed
while exclusively holding cacheline (read or write) lock.
So for a cacheline on LRU list we acquire cacheline lock,
safely resolve hash and consequently write-lock hash bucket.
Since cacheline lock is acquired under hash bucket (everywhere
except for new eviction implementation), we are certain that
noone acquires cacheline lock behind our back. Concurrent
eviction threads are eliminated by holding eviction list
lock for the duration of critial locking operations.
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
1. new abbreviated previx: ocf_hb (HB stands for hash bucket)
2. clear distinction between functions requiring caller to
hold metadata shared global lock ("naked") vs the ones
which acquire global lock on its own ("prot" for protected)
3. clear distinction between hash bucket locking functions
accepting hash bucket id ("id"), core line and lba ("cline")
and entire request ("req").
Resulting naming scheme:
ocf_hb_(id/cline/req)_(prot/naked)_(lock/unlock/trylock)_(rd/wr)
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
Removing the logic for oportunistic partition overflow
reduction by evicting more cachelines than actually
required by the request being serviced.
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
If request is hit, simply try to acquire cachelines instead of verifying
whether target partition's size is not exceeded.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
**CMake lists**: link Zlib;
include libs for UT during compilation.
**prapare script**: add path to regular ocf_env files;
ignore 'memcpy' functions when copied to wrappers.
**cleaning policy**: update of some functions for proper use of atomics.
Signed-off-by: Slawomir_Jankowski <slawomir.jankowski@intel.com>
**run tests script**: cleanup before UT starts;
usage of regular ocf_env files by symlinks.
**tests conifg**: add path to regular ocf_env files.
Signed-off-by: Slawomir_Jankowski <slawomir.jankowski@intel.com>
Test code have to contain wraps only for those functions, which are used by
test itself. Empty wraps are generated automatically by UT framework.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
