87 lines
No EOL
2.3 KiB
Go
87 lines
No EOL
2.3 KiB
Go
/*
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Constants that are used across scripts
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1. The available hosts = stratos-00x (x varies from 1 to 8)
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2. cap_margin = percentage of the requested power to allocate
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3. power_threshold = overloading factor
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4. total_power = total power per node
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5. window_size = number of tasks to consider for computation of the dynamic cap.
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Also, exposing functions to update or initialize some of the constants.
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*/
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package constants
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var Hosts = []string{"stratos-001", "stratos-002",
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"stratos-003", "stratos-004",
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"stratos-005", "stratos-006",
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"stratos-007", "stratos-008"}
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// Add a new host to the slice of hosts.
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func AddNewHost(new_host string) bool {
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// Validation
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if new_host == "" {
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return false
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} else {
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Hosts = append(Hosts, new_host)
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return true
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}
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}
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// Lower bound of the percentage of requested power, that can be allocated to a task.
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var Power_threshold = 0.6 // Right now saying that a task will never be given lesser than 60% of the power it requested.
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/*
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Margin with respect to the required power for a job.
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So, if power required = 10W, the node would be capped to 75%*10W.
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This value can be changed upon convenience.
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*/
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var Cap_margin = 0.70
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// Modify the cap margin.
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func UpdateCapMargin(new_cap_margin float64) bool {
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// Checking if the new_cap_margin is less than the power threshold.
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if new_cap_margin < Starvation_factor {
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return false
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} else {
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Cap_margin = new_cap_margin
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return true
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}
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}
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// Threshold factor that would make (Cap_margin * task.Watts) equal to (60/100 * task.Watts).
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var Starvation_factor = 0.8
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// Total power per node.
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var Total_power map[string]float64
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// Initialize the total power per node. This should be done before accepting any set of tasks for scheduling.
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func AddTotalPowerForHost(host string, total_power float64) bool {
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// Validation
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is_correct_host := false
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for _, existing_host := range Hosts {
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if host == existing_host {
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is_correct_host = true
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}
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}
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if !is_correct_host {
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return false
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} else {
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Total_power[host] = total_power
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return true
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}
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}
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// Window size for running average
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var Window_size = 10
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// Update the window size.
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func UpdateWindowSize(new_window_size int) bool {
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// Validation
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if new_window_size == 0 {
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return false
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} else{
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Window_size = new_window_size
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return true
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}
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} |