Expose a cache of pci devices in form of an assoc array that could be
looked up during the runtime of a script like setup.sh.
In case of setup.sh, caching speeds up execution quite visibly:
config run, no caching:
real 0m4.488s
user 0m1.440s
sys 0m1.260s
config run, caching in use:
real 0m2.876s
user 0m0.365s
sys 0m0.420s
Note that for initial config runs, binding controllers to proper
drivers is the actual bottleneck.
status run, no caching:
real 0m1.877s
user 0m1.252s
sys 0m0.984s
status run, caching in use:
real 0m0.371s
user 0m0.242s
sys 0m0.204s
reset run, no caching:
real 0m2.559s
user 0m1.409s
sys 0m1.322s
reset run, caching in use:
real 0m0.960s
user 0m0.432s
sys 0m0.419s
Additionally, in case common tools, e.g. lspci, are missing, fallback to
sysfs to pick all needed devices from the pci bus. Targeted for Linux
systems only.
Change-Id: Ib69ef724b9f09eca0cbb9b88f1c363edc1efd5dc
Signed-off-by: Michal Berger <michalx.berger@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/1845
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
36e573fc6b