ceremonyclient/go-libp2p/p2p/host/resource-manager/limit_test.go

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2023-08-21 03:50:38 +00:00
package rcmgr
import (
"encoding/json"
"math"
"runtime"
"testing"
"github.com/stretchr/testify/require"
)
func TestFileDescriptorCounting(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("can't read file descriptors on Windows")
}
n := getNumFDs()
require.NotZero(t, n)
require.Less(t, n, int(1e7))
}
func TestScaling(t *testing.T) {
base := BaseLimit{
Streams: 100,
StreamsInbound: 200,
StreamsOutbound: 400,
Conns: 10,
ConnsInbound: 20,
ConnsOutbound: 40,
FD: 1,
Memory: 1 << 20,
}
t.Run("no scaling if no increase is defined", func(t *testing.T) {
cfg := ScalingLimitConfig{ServiceBaseLimit: base}
scaled := cfg.Scale(8<<30, 100)
require.Equal(t, base, scaled.serviceDefault)
})
t.Run("scaling", func(t *testing.T) {
cfg := ScalingLimitConfig{
TransientBaseLimit: base,
TransientLimitIncrease: BaseLimitIncrease{
Streams: 1,
StreamsInbound: 2,
StreamsOutbound: 3,
Conns: 4,
ConnsInbound: 5,
ConnsOutbound: 6,
Memory: 7,
FDFraction: 0.5,
},
}
scaled := cfg.Scale(128<<20+4<<30, 1000)
require.Equal(t, 500, scaled.transient.FD)
require.Equal(t, base.Streams+4, scaled.transient.Streams)
require.Equal(t, base.StreamsInbound+4*2, scaled.transient.StreamsInbound)
require.Equal(t, base.StreamsOutbound+4*3, scaled.transient.StreamsOutbound)
require.Equal(t, base.Conns+4*4, scaled.transient.Conns)
require.Equal(t, base.ConnsInbound+4*5, scaled.transient.ConnsInbound)
require.Equal(t, base.ConnsOutbound+4*6, scaled.transient.ConnsOutbound)
require.Equal(t, base.Memory+4*7, scaled.transient.Memory)
})
t.Run("scaling and using the base amounts", func(t *testing.T) {
cfg := ScalingLimitConfig{
TransientBaseLimit: base,
TransientLimitIncrease: BaseLimitIncrease{
Streams: 1,
StreamsInbound: 2,
StreamsOutbound: 3,
Conns: 4,
ConnsInbound: 5,
ConnsOutbound: 6,
Memory: 7,
FDFraction: 0.01,
},
}
scaled := cfg.Scale(1, 10)
require.Equal(t, 1, scaled.transient.FD)
require.Equal(t, base.Streams, scaled.transient.Streams)
require.Equal(t, base.StreamsInbound, scaled.transient.StreamsInbound)
require.Equal(t, base.StreamsOutbound, scaled.transient.StreamsOutbound)
require.Equal(t, base.Conns, scaled.transient.Conns)
require.Equal(t, base.ConnsInbound, scaled.transient.ConnsInbound)
require.Equal(t, base.ConnsOutbound, scaled.transient.ConnsOutbound)
require.Equal(t, base.Memory, scaled.transient.Memory)
})
t.Run("scaling limits in maps", func(t *testing.T) {
cfg := ScalingLimitConfig{
ServiceLimits: map[string]baseLimitConfig{
"A": {
BaseLimit: BaseLimit{Streams: 10, Memory: 100, FD: 9},
},
"B": {
BaseLimit: BaseLimit{Streams: 20, Memory: 200, FD: 10},
BaseLimitIncrease: BaseLimitIncrease{Streams: 2, Memory: 3, FDFraction: 0.4},
},
},
}
scaled := cfg.Scale(128<<20+4<<30, 1000)
require.Len(t, scaled.service, 2)
require.Contains(t, scaled.service, "A")
require.Equal(t, 10, scaled.service["A"].Streams)
require.Equal(t, int64(100), scaled.service["A"].Memory)
require.Equal(t, 9, scaled.service["A"].FD)
require.Contains(t, scaled.service, "B")
require.Equal(t, 20+4*2, scaled.service["B"].Streams)
require.Equal(t, int64(200+4*3), scaled.service["B"].Memory)
require.Equal(t, 400, scaled.service["B"].FD)
})
}
func TestReadmeExample(t *testing.T) {
scalingLimits := ScalingLimitConfig{
SystemBaseLimit: BaseLimit{
ConnsInbound: 64,
ConnsOutbound: 128,
Conns: 128,
StreamsInbound: 512,
StreamsOutbound: 1024,
Streams: 1024,
Memory: 128 << 20,
FD: 256,
},
SystemLimitIncrease: BaseLimitIncrease{
ConnsInbound: 32,
ConnsOutbound: 64,
Conns: 64,
StreamsInbound: 256,
StreamsOutbound: 512,
Streams: 512,
Memory: 256 << 20,
FDFraction: 1,
},
}
limitConf := scalingLimits.Scale(4<<30, 1000)
require.Equal(t, 384, limitConf.system.Conns)
require.Equal(t, 1000, limitConf.system.FD)
}
func TestJSONMarshalling(t *testing.T) {
bl := ResourceLimits{
Streams: DefaultLimit,
StreamsInbound: 10,
StreamsOutbound: BlockAllLimit,
Conns: 10,
// ConnsInbound: DefaultLimit,
ConnsOutbound: Unlimited,
Memory: Unlimited64,
}
jsonEncoded, err := json.Marshal(bl)
require.NoError(t, err)
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require.Equal(t, `{"StreamsInbound":10,"StreamsOutbound":"blockAll","Conns":10,"ConnsOutbound":"unlimited","Memory":"unlimited"}`, string(jsonEncoded))
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// Roundtrip
var blDecoded ResourceLimits
err = json.Unmarshal(jsonEncoded, &blDecoded)
require.NoError(t, err)
require.Equal(t, bl, blDecoded)
}
func TestJSONRoundTripInt64(t *testing.T) {
bl := ResourceLimits{
Memory: math.MaxInt64,
}
jsonEncoded, err := json.Marshal(bl)
require.NoError(t, err)
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require.Equal(t, `{"Memory":"9223372036854775807"}`, string(jsonEncoded))
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// Roundtrip
var blDecoded ResourceLimits
err = json.Unmarshal(jsonEncoded, &blDecoded)
require.NoError(t, err)
require.Equal(t, bl, blDecoded)
}
func TestRoundTripFromConcreteAndBack(t *testing.T) {
l := PartialLimitConfig{
System: ResourceLimits{
Conns: 1234,
Memory: 54321,
},
ServiceDefault: ResourceLimits{
Conns: 2,
},
Service: map[string]ResourceLimits{
"foo": {
Conns: 3,
},
},
}
concrete := l.Build(InfiniteLimits)
// Roundtrip
fromConcrete := concrete.ToPartialLimitConfig().Build(InfiniteLimits)
require.Equal(t, concrete, fromConcrete)
}
func TestSerializeJSON(t *testing.T) {
bl := BaseLimit{
Streams: 10,
}
out, err := json.Marshal(bl)
require.NoError(t, err)
require.Equal(t, "{\"Streams\":10}", string(out))
bli := BaseLimitIncrease{
Streams: 10,
}
out, err = json.Marshal(bli)
require.NoError(t, err)
require.Equal(t, "{\"Streams\":10}", string(out))
}
func TestWhatIsZeroInResourceLimits(t *testing.T) {
l := ResourceLimits{
Streams: BlockAllLimit,
Memory: BlockAllLimit64,
}
out, err := json.Marshal(l)
require.NoError(t, err)
require.Equal(t, `{"Streams":"blockAll","Memory":"blockAll"}`, string(out))
l2 := ResourceLimits{}
err = json.Unmarshal([]byte(`{"Streams":0,"Memory":0}`), &l2)
require.NoError(t, err)
require.Equal(t, l, l2)
l3 := ResourceLimits{}
err = json.Unmarshal([]byte(`{"Streams":0,"Memory":"0"}`), &l3)
require.NoError(t, err)
require.Equal(t, l, l3)
}