diff options
Diffstat (limited to 'resources/libraries/python/CpuUtils.py')
| -rw-r--r-- | resources/libraries/python/CpuUtils.py | 60 |
1 files changed, 26 insertions, 34 deletions
diff --git a/resources/libraries/python/CpuUtils.py b/resources/libraries/python/CpuUtils.py index 07c5032aa8..91db83eb5c 100644 --- a/resources/libraries/python/CpuUtils.py +++ b/resources/libraries/python/CpuUtils.py @@ -253,7 +253,6 @@ class CpuUtils(object): :param nf_nodes: Number of NF nodes in chain. :param nf_chain: Chain number indexed from 1. :param nf_node: Node number indexed from 1. - :param vs_dtc: Amount of physical cores for vswitch dataplane. :param nf_dtc: Amount of physical cores for NF dataplane. :param nf_mtcr: NF main thread per core ratio. :param nf_dtcr: NF dataplane thread per core ratio. @@ -264,7 +263,6 @@ class CpuUtils(object): :type nf_nodes: int :type nf_chain: int :type nf_node: int - :type vs_dtc: int :type nf_dtc: int or float :type nf_mtcr: int :type nf_dtcr: int @@ -274,57 +272,51 @@ class CpuUtils(object): :raises RuntimeError: If we require more cpus than available or if placement is not possible due to wrong parameters. """ - if nf_chain - 1 >= nf_chains: - raise RuntimeError("ChainID is higher than total number of chains!") - if nf_node - 1 >= nf_nodes: - raise RuntimeError("NodeID is higher than chain nodes!") + if not 1 <= nf_chain <= nf_chains: + raise RuntimeError("ChainID is out of range!") + if not 1 <= nf_node <= nf_nodes: + raise RuntimeError("NodeID is out of range!") smt_used = CpuUtils.is_smt_enabled(node['cpuinfo']) cpu_list = CpuUtils.cpu_list_per_node(node, cpu_node, smt_used) # CPU thread sibling offset. sib = len(cpu_list) / CpuUtils.NR_OF_THREADS - if not smt_used and not isinstance(nf_dtc, int): + dtc_is_integer = isinstance(nf_dtc, int) + if not smt_used and not dtc_is_integer: raise RuntimeError("Cannot allocate if SMT is not enabled!") + # TODO: Please reword the following todo if it is still relevant # TODO: Workaround as we are using physical core as main unit, we must # adjust number of physical dataplane cores in case of float for further # array referencing. As rounding method in Py2.7 and Py3.x differs, we # are using static mapping. This can be rewritten using flat arrays and # different logic (from Physical core unit to Logical core unit). - dtc = 1 if not isinstance(nf_dtc, int) else nf_dtc + if not dtc_is_integer: + nf_dtc = 1 - mt_req = ((nf_chains * nf_nodes) + nf_mtcr - 1) / nf_mtcr - dt_req = ((nf_chains * nf_nodes) + nf_dtcr - 1) / nf_dtcr - cpu_req = skip_cnt + mt_req + dt_req + mt_req = ((nf_chains * nf_nodes) + nf_mtcr - 1) // nf_mtcr + dt_req = ((nf_chains * nf_nodes) + nf_dtcr - 1) // nf_dtcr - if smt_used and cpu_req > len(cpu_list) / CpuUtils.NR_OF_THREADS: - raise RuntimeError("Not enough CPU cores available for placement!") - elif not smt_used and cpu_req > len(cpu_list): + if (skip_cnt + mt_req + dt_req) > (sib if smt_used else len(cpu_list)): raise RuntimeError("Not enough CPU cores available for placement!") offset = (nf_node - 1) + (nf_chain - 1) * nf_nodes - try: - mt_odd = (offset / mt_req) & 1 - mt_skip = skip_cnt + (offset % mt_req) - dt_odd = (offset / dt_req) & 1 - dt_skip = skip_cnt + mt_req + (offset % dt_req) * dtc - except ZeroDivisionError: - raise RuntimeError("Invalid placement combination!") + mt_skip = skip_cnt + (offset % mt_req) + dt_skip = skip_cnt + mt_req + (offset % dt_req) * nf_dtc + + result = cpu_list[dt_skip:dt_skip + nf_dtc] if smt_used: - mt_list = [cpu for cpu in cpu_list[mt_skip+sib:mt_skip+sib + 1]] \ - if mt_odd else [cpu for cpu in cpu_list[mt_skip:mt_skip + 1]] - dt_list = [cpu for cpu in cpu_list[dt_skip+sib:dt_skip+sib + dtc]] \ - if dt_odd else [cpu for cpu in cpu_list[dt_skip:dt_skip + dtc]] - if isinstance(nf_dtc, int): - dt_list = \ - [cpu for cpu in cpu_list[dt_skip:dt_skip + dtc]] - dt_list += \ - [cpu for cpu in cpu_list[dt_skip+sib:dt_skip+sib + dtc]] - else: - mt_list = [cpu for cpu in cpu_list[mt_skip:mt_skip + 1]] - dt_list = [cpu for cpu in cpu_list[dt_skip:dt_skip + dtc]] + if (offset // mt_req) & 1: # check oddness + mt_skip += sib + + dt_skip += sib + if dtc_is_integer: + result.extend(cpu_list[dt_skip:dt_skip + nf_dtc]) + elif (offset // dt_req) & 1: # check oddness + result = cpu_list[dt_skip:dt_skip + nf_dtc] - return mt_list + dt_list + result[0:0] = cpu_list[mt_skip:mt_skip + 1] + return result @staticmethod def get_affinity_nf(nodes, node, nf_chains=1, nf_nodes=1, nf_chain=1, |