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covid19_components_step.cu
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/
covid19_components_step.cu
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// Copyright (c) 2021, salesforce.com, inc.
// All rights reserved.
// SPDX-License-Identifier: BSD-3-Clause
// For full license text, see the LICENSE file in the repo root
// or https://opensource.org/licenses/BSD-3-Clause
extern "C" {
// CUDA version of the components in
// "ai_economist.foundation.components.covid19_components.py"
__global__ void CudaControlUSStateOpenCloseStatusStep(
int * stringency_level,
const int kActionCooldownPeriod,
int * action_in_cooldown_until,
const int * kDefaultAgentActionMask,
const int * kNoOpAgentActionMask,
const int kNumStringencyLevels,
int * actions,
float * obs_a_stringency_policy_indicators,
float * obs_a_action_mask,
float * obs_p_stringency_policy_indicators,
int * env_timestep_arr,
const int kNumAgents,
const int kEpisodeLength
) {
const int kEnvId = blockIdx.x;
const int kAgentId = threadIdx.x;
// Increment time ONCE -- only 1 thread can do this.
if (kAgentId == 0) {
env_timestep_arr[kEnvId] += 1;
}
// Wait here until timestep has been updated
__syncthreads();
assert(env_timestep_arr[kEnvId] > 0 &&
env_timestep_arr[kEnvId] <= kEpisodeLength);
assert (kAgentId <= kNumAgents - 1);
// Update the stringency levels for the US states
if (kAgentId < (kNumAgents - 1)) {
// Indices for time-dependent and time-independent arrays
// Time dependent arrays have shapes
// (num_envs, kEpisodeLength + 1, kNumAgents - 1)
// Time independent arrays have shapes (num_envs, kNumAgents - 1)
const int kArrayIdxOffset = kEnvId * (kEpisodeLength + 1) *
(kNumAgents - 1);
int time_dependent_array_index_curr_t = kArrayIdxOffset +
env_timestep_arr[kEnvId] * (kNumAgents - 1) + kAgentId;
int time_dependent_array_index_prev_t = kArrayIdxOffset +
(env_timestep_arr[kEnvId] - 1) * (kNumAgents - 1) + kAgentId;
const int time_independent_array_index = kEnvId * (kNumAgents - 1) +
kAgentId;
// action is not a NO-OP
if (actions[time_independent_array_index] != 0) {
stringency_level[time_dependent_array_index_curr_t] =
actions[time_independent_array_index];
} else {
stringency_level[time_dependent_array_index_curr_t] =
stringency_level[time_dependent_array_index_prev_t];
}
if (env_timestep_arr[kEnvId] == action_in_cooldown_until[
time_independent_array_index] + 1) {
if (actions[time_independent_array_index] != 0) {
assert(0 <= actions[time_independent_array_index] <=
kNumStringencyLevels);
action_in_cooldown_until[time_independent_array_index] +=
kActionCooldownPeriod;
} else {
action_in_cooldown_until[time_independent_array_index] += 1;
}
}
obs_a_stringency_policy_indicators[
time_independent_array_index
] = stringency_level[time_dependent_array_index_curr_t] /
static_cast<float>(kNumStringencyLevels);
// CUDA version of generate_masks()
for (int action_id = 0; action_id < (kNumStringencyLevels + 1);
action_id++) {
int action_mask_array_index =
kEnvId * (kNumStringencyLevels + 1) *
(kNumAgents - 1) + action_id * (kNumAgents - 1) + kAgentId;
if (env_timestep_arr[kEnvId] < action_in_cooldown_until[
time_independent_array_index]
) {
obs_a_action_mask[action_mask_array_index] =
kNoOpAgentActionMask[action_id];
} else {
obs_a_action_mask[action_mask_array_index] =
kDefaultAgentActionMask[action_id];
}
}
}
// Update planner obs after all the agents' obs are updated
__syncthreads();
if (kAgentId == kNumAgents - 1) {
for (int ag_id = 0; ag_id < (kNumAgents - 1); ag_id++) {
const int kIndex = kEnvId * (kNumAgents - 1) + ag_id;
obs_p_stringency_policy_indicators[
kIndex
] =
obs_a_stringency_policy_indicators[
kIndex
];
}
}
}
__global__ void CudaFederalGovernmentSubsidyStep(
int * subsidy_level,
float * subsidy,
const int kSubsidyInterval,
const int kNumSubsidyLevels,
const float * KMaxDailySubsidyPerState,
const int * kDefaultPlannerActionMask,
const int * kNoOpPlannerActionMask,
int * actions,
float * obs_a_time_until_next_subsidy,
float * obs_a_current_subsidy_level,
float * obs_p_time_until_next_subsidy,
float * obs_p_current_subsidy_level,
float * obs_p_action_mask,
int * env_timestep_arr,
const int kNumAgents,
const int kEpisodeLength
) {
const int kEnvId = blockIdx.x;
const int kAgentId = threadIdx.x;
assert(env_timestep_arr[kEnvId] > 0 &&
env_timestep_arr[kEnvId] <= kEpisodeLength);
assert (kAgentId <= kNumAgents - 1);
int t_since_last_subsidy = env_timestep_arr[kEnvId] %
kSubsidyInterval;
// Setting the (federal government) planner's subsidy level
// to be the subsidy level for all the US states
if (kAgentId < kNumAgents - 1) {
// Indices for time-dependent and time-independent arrays
// Time dependent arrays have shapes (num_envs,
// kEpisodeLength + 1, kNumAgents - 1)
// Time independent arrays have shapes (num_envs, kNumAgents - 1)
const int kArrayIdxOffset = kEnvId * (kEpisodeLength + 1) *
(kNumAgents - 1);
int time_dependent_array_index_curr_t = kArrayIdxOffset +
env_timestep_arr[kEnvId] * (kNumAgents - 1) + kAgentId;
int time_dependent_array_index_prev_t = kArrayIdxOffset +
(env_timestep_arr[kEnvId] - 1) * (kNumAgents - 1) + kAgentId;
const int time_independent_array_index = kEnvId *
(kNumAgents - 1) + kAgentId;
if ((env_timestep_arr[kEnvId] - 1) % kSubsidyInterval == 0) {
assert(0 <= actions[kEnvId] <= kNumSubsidyLevels);
subsidy_level[time_dependent_array_index_curr_t] =
actions[kEnvId];
} else {
subsidy_level[time_dependent_array_index_curr_t] =
subsidy_level[time_dependent_array_index_prev_t];
}
// Setting the subsidies for the US states
// based on the federal government's subsidy level
subsidy[time_dependent_array_index_curr_t] =
subsidy_level[time_dependent_array_index_curr_t] *
KMaxDailySubsidyPerState[kAgentId] / kNumSubsidyLevels;
obs_a_time_until_next_subsidy[
time_independent_array_index] =
1 - (t_since_last_subsidy /
static_cast<float>(kSubsidyInterval));
obs_a_current_subsidy_level[
time_independent_array_index] =
subsidy_level[time_dependent_array_index_curr_t] /
static_cast<float>(kNumSubsidyLevels);
} else if (kAgentId == (kNumAgents - 1)) {
for (int action_id = 0; action_id < kNumSubsidyLevels + 1;
action_id++) {
int action_mask_array_index = kEnvId *
(kNumSubsidyLevels + 1) + action_id;
if (env_timestep_arr[kEnvId] % kSubsidyInterval == 0) {
obs_p_action_mask[action_mask_array_index] =
kDefaultPlannerActionMask[action_id];
} else {
obs_p_action_mask[action_mask_array_index] =
kNoOpPlannerActionMask[action_id];
}
}
// Update planner obs after the agent's obs are updated
__syncthreads();
if (kAgentId == (kNumAgents - 1)) {
// Just use the values for agent id 0
obs_p_time_until_next_subsidy[kEnvId] =
obs_a_time_until_next_subsidy[
kEnvId * (kNumAgents - 1)
];
obs_p_current_subsidy_level[kEnvId] =
obs_a_current_subsidy_level[
kEnvId * (kNumAgents - 1)
];
}
}
}
__global__ void CudaVaccinationCampaignStep(
int * vaccinated,
const int * kNumVaccinesPerDelivery,
int * num_vaccines_available_t,
const int kDeliveryInterval,
const int kTimeWhenVaccineDeliveryBegins,
float * obs_a_vaccination_campaign_t_until_next_vaccines,
float * obs_p_vaccination_campaign_t_until_next_vaccines,
int * env_timestep_arr,
int kNumAgents,
int kEpisodeLength
) {
const int kEnvId = blockIdx.x;
const int kAgentId = threadIdx.x;
assert(env_timestep_arr[kEnvId] > 0 && env_timestep_arr[kEnvId] <=
kEpisodeLength);
assert(kTimeWhenVaccineDeliveryBegins > 0);
assert (kAgentId <= kNumAgents - 1);
// CUDA version of generate observations()
int t_first_delivery = kTimeWhenVaccineDeliveryBegins +
kTimeWhenVaccineDeliveryBegins % kDeliveryInterval;
int next_t = env_timestep_arr[kEnvId] + 1;
float t_until_next_vac;
if (next_t <= t_first_delivery) {
t_until_next_vac = min(
1,
(t_first_delivery - next_t) / kDeliveryInterval);
} else {
float t_since_last_vac = next_t % kDeliveryInterval;
t_until_next_vac = 1 - (t_since_last_vac / kDeliveryInterval);
}
// Update the vaccinated numbers for just the US states
if (kAgentId < (kNumAgents - 1)) {
const int time_independent_array_index = kEnvId *
(kNumAgents - 1) + kAgentId;
if ((env_timestep_arr[kEnvId] >= kTimeWhenVaccineDeliveryBegins) &&
(env_timestep_arr[kEnvId] % kDeliveryInterval == 0)) {
num_vaccines_available_t[time_independent_array_index] =
kNumVaccinesPerDelivery[kAgentId];
} else {
num_vaccines_available_t[time_independent_array_index] = 0;
}
obs_a_vaccination_campaign_t_until_next_vaccines[
time_independent_array_index] = t_until_next_vac;
} else if (kAgentId == kNumAgents - 1) {
obs_p_vaccination_campaign_t_until_next_vaccines[kEnvId] =
t_until_next_vac;
}
}
}