wehub-resource-sync
106 lines
2.5 KiB
Go
106 lines
2.5 KiB
Go
package worker
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import (
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"sync"
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"sync/atomic"
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"time"
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. "github.com/onsi/ginkgo/v2"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("backendSupervisor.lockBackend", func() {
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It("serializes operations on the same backend name", func() {
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s := &backendSupervisor{processes: map[string]*backendProcess{}}
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var inflight, peak int32
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var wg sync.WaitGroup
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for i := 0; i < 4; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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release := s.lockBackend("llama-cpp")
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defer release()
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now := atomic.AddInt32(&inflight, 1)
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for {
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p := atomic.LoadInt32(&peak)
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if now <= p || atomic.CompareAndSwapInt32(&peak, p, now) {
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break
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}
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}
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time.Sleep(20 * time.Millisecond)
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atomic.AddInt32(&inflight, -1)
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}()
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}
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wg.Wait()
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Expect(atomic.LoadInt32(&peak)).To(Equal(int32(1)),
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"only one goroutine should hold the per-backend lock at a time")
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})
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It("allows different backend names to run in parallel", func() {
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s := &backendSupervisor{processes: map[string]*backendProcess{}}
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var inflight, peak int32
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var wg sync.WaitGroup
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names := []string{"llama-cpp", "vllm", "whisper", "speaker-recognition"}
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for _, n := range names {
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n := n
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wg.Add(1)
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go func() {
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defer wg.Done()
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release := s.lockBackend(n)
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defer release()
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now := atomic.AddInt32(&inflight, 1)
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for {
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p := atomic.LoadInt32(&peak)
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if now <= p || atomic.CompareAndSwapInt32(&peak, p, now) {
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break
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}
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}
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time.Sleep(50 * time.Millisecond)
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atomic.AddInt32(&inflight, -1)
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}()
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}
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wg.Wait()
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Expect(atomic.LoadInt32(&peak)).To(BeNumerically(">=", int32(2)),
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"distinct backends should be able to run concurrently")
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})
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})
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var _ = Describe("backendSupervisor upgrade handler", func() {
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It("serializes upgrade against install for the same backend name", func() {
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s := &backendSupervisor{processes: map[string]*backendProcess{}}
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var inflight, peak int32
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var wg sync.WaitGroup
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// Simulate one install + one upgrade on the same backend name.
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// The two handlers each acquire lockBackend("llama-cpp"); only one
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// should hold the lock at a time.
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acquire := func() {
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defer wg.Done()
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release := s.lockBackend("llama-cpp")
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defer release()
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now := atomic.AddInt32(&inflight, 1)
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for {
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p := atomic.LoadInt32(&peak)
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if now <= p || atomic.CompareAndSwapInt32(&peak, p, now) {
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break
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}
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}
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time.Sleep(20 * time.Millisecond)
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atomic.AddInt32(&inflight, -1)
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}
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wg.Add(2)
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go acquire()
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go acquire()
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wg.Wait()
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Expect(atomic.LoadInt32(&peak)).To(Equal(int32(1)))
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})
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})
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