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sigar_linux_test.go
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sigar_linux_test.go
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package sigar
import (
"io/ioutil"
"os"
"path/filepath"
"time"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
// Helpers. Create various system information files
var procd string
var etcd string
func setupFile(path, contents string) {
_ = os.MkdirAll(filepath.Dir(path), 0755)
err := ioutil.WriteFile(path, []byte(contents), 0444)
Expect(err).ToNot(HaveOccurred())
}
func cgroupSetup(contents string) {
setupFile(procd+"/self/cgroup", contents+"\n")
}
func memLimitSetup1(cg, contents string) {
setupFile(procd+"/memory"+cg+"/memory.limit_in_bytes", contents+"\n")
}
func memLimitSetup2(cg, contents string) {
setupFile(procd+cg+"/memory.high", contents+"\n")
}
func memStatSetup(cg, contents string) {
setupFile(procd+"/memory"+cg+"/memory.stat", contents+"\n")
}
func memStatWithSwap(cg string) {
memStatSetup(cg, `total_rss 14108536832
swap 290564089`)
}
func memStatWithoutSwap(cg string) {
memStatSetup(cg, `total_rss 14108536832`)
}
func memUsageSetup2(cg, contents string) {
setupFile(procd+cg+"/memory.current", contents+"\n")
}
func swapUsageSetup1(cg, contents string) {
setupFile(procd+"/memory"+cg+"/memory.stat", contents+"\n")
}
func swapUsageSetup2(cg, contents string) {
setupFile(procd+cg+"/memory.swap.current", contents+"\n")
}
func memUsageWithSwap(cg string) {
memUsageSetup2(cg, `14108536832`)
swapUsageSetup2(cg, `290564089`)
}
func memUsageWithoutSwap(cg string) {
memUsageSetup2(cg, `14108536832`)
}
func memInfoSetup(contents string) {
setupFile(procd+"/meminfo", contents+"\n")
}
func memInfoWithMemAvailable() {
memInfoSetup(`
MemTotal: 35008180 kB
MemFree: 487816 kB
MemAvailable: 20913400 kB
Buffers: 249244 kB
Cached: 5064684 kB
`)
}
func memInfoWithoutMemAvailable() {
memInfoSetup(`
MemTotal: 35008180 kB
MemFree: 487816 kB
Buffers: 249244 kB
Cached: 5064684 kB
`)
}
func setupEtcMtab() {
setupMountsFile(etcd + "/mtab")
}
func setupProcMounts() {
setupMountsFile(procd + "/mounts")
}
func setupMountsFile(filePath string) {
setupFile(filePath, `sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,nosuid,relatime,size=949852k,nr_inodes=185646,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=204020k,mode=755 0 0
/dev/sda1 / ext4 rw,noatime,errors=remount-ro,stripe=32753 0 0
/dev/sdb1 /home ext4 rw,noatime,errors=remount-ro 0 0`)
}
var _ = Describe("sigarLinux", func() {
BeforeEach(func() {
var err error
procd, err = ioutil.TempDir("", "sigarTests")
Expect(err).ToNot(HaveOccurred())
etcd, err = ioutil.TempDir("", "sigarTestsEtc")
Expect(err).ToNot(HaveOccurred())
// Can share the directory, no overlap in files used
Procd = procd
Etcd = etcd
Sysd1 = procd + "/memory"
Sysd2 = procd
})
AfterEach(func() {
Procd = "/proc"
Etcd = "/etc"
Sysd1 = "/sys/fs/cgroup/unified"
Sysd2 = "/sys/fs/cgroup/memory"
err := os.RemoveAll(procd)
Expect(err).ToNot(HaveOccurred())
err = os.RemoveAll(etcd)
Expect(err).ToNot(HaveOccurred())
})
Describe("Initialization subset: Cgroup Controller Mountpoints", func() {
Describe("No mounts", func() {
var sys1, sys2 string
BeforeEach(func() {
setupFile(procd+"/self/mounts", `
device path type options
alpha /fox cgroup options
beta /dog jumping memory
cgroup /cat sleeping irrelevant
delta /carp
`)
})
It("it is a no-op", func() {
determineControllerMounts(&sys1, &sys2)
Expect(sys1).To(Equal(""))
Expect(sys2).To(Equal(""))
})
})
Describe("Mounts", func() {
var sys1, sys2 string
BeforeEach(func() {
setupFile(procd+"/self/mounts", `
device path type options
memory1 /somewhere/over/the/rainbow cgroup dummy,memory,and,other
memory2 /smart/fox/jumped/by/lazy/dog cgroup2 irrelevant,options
`)
})
It("it extracts the mounts", func() {
determineControllerMounts(&sys1, &sys2)
Expect(sys1).To(Equal("/somewhere/over/the/rainbow"))
Expect(sys2).To(Equal("/smart/fox/jumped/by/lazy/dog"))
})
})
Describe("Multiple Mounts", func() {
var sys1, sys2 string
BeforeEach(func() {
setupFile(procd+"/self/mounts", `
device path type options
memory1 /somewhere/over/the/rainbow cgroup dummy,memory,and,other
memory2 /smart/fox/jumped/by/lazy/dog cgroup2 irrelevant,options
memory1 /somewhere/over/the/rainbow/duplicate cgroup dummy,memory,and,other
memory2 /smart/fox/jumped/by/lazy/dog/duplicate cgroup2 irrelevant,options
`)
})
It("it extracts the first matching mounts", func() {
determineControllerMounts(&sys1, &sys2)
Expect(sys1).To(Equal("/somewhere/over/the/rainbow"))
Expect(sys2).To(Equal("/smart/fox/jumped/by/lazy/dog"))
})
})
})
Describe("CPU", func() {
var (
statFile string
cpu Cpu
)
BeforeEach(func() {
statFile = procd + "/stat"
cpu = Cpu{}
})
Describe("Get", func() {
It("gets CPU usage", func() {
statContents := []byte("cpu 25 1 2 3 4 5 6 7")
err := ioutil.WriteFile(statFile, statContents, 0644)
Expect(err).ToNot(HaveOccurred())
err = cpu.Get()
Expect(err).ToNot(HaveOccurred())
Expect(cpu.User).To(Equal(uint64(25)))
})
It("ignores empty lines", func() {
statContents := []byte("cpu ")
err := ioutil.WriteFile(statFile, statContents, 0644)
Expect(err).ToNot(HaveOccurred())
err = cpu.Get()
Expect(err).ToNot(HaveOccurred())
Expect(cpu.User).To(Equal(uint64(0)))
})
})
Describe("CollectCpuStats", func() {
It("collects CPU usage over time", func() {
statContents := []byte("cpu 25 1 2 3 4 5 6 7")
err := ioutil.WriteFile(statFile, statContents, 0644)
Expect(err).ToNot(HaveOccurred())
concrete := &ConcreteSigar{}
cpuUsages, stop := concrete.CollectCpuStats(500 * time.Millisecond)
Expect(<-cpuUsages).To(Equal(Cpu{
User: uint64(25),
Nice: uint64(1),
Sys: uint64(2),
Idle: uint64(3),
Wait: uint64(4),
Irq: uint64(5),
SoftIrq: uint64(6),
Stolen: uint64(7),
}))
statContents = []byte("cpu 30 3 7 10 25 55 36 65")
err = ioutil.WriteFile(statFile, statContents, 0644)
Expect(err).ToNot(HaveOccurred())
Expect(<-cpuUsages).To(Equal(Cpu{
User: uint64(5),
Nice: uint64(2),
Sys: uint64(5),
Idle: uint64(7),
Wait: uint64(21),
Irq: uint64(50),
SoftIrq: uint64(30),
Stolen: uint64(58),
}))
stop <- struct{}{}
})
})
})
Describe("Memory", func() {
Describe("determineSelfCgroup", func() {
It("fails for missing file", func() {
var cg string
err := determineSelfCgroup(&cg)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("open " + procd + "/self/cgroup: no such file or directory"))
Expect(cg).To(Equal(""))
})
It("fails for empty file", func() {
cgroupSetup(``)
var cg string
err := determineSelfCgroup(&cg)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("unable to determine control group"))
Expect(cg).To(Equal(""))
})
It("fails for missing data", func() {
cgroupSetup(`12:freezer:/`)
var cg string
err := determineSelfCgroup(&cg)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("unable to determine control group"))
Expect(cg).To(Equal(""))
})
It("finds *:memory: over 0::", func() {
cgroupSetup(`4:memory:/user
0::/bogus`)
var cg string
err := determineSelfCgroup(&cg)
Expect(err).ToNot(HaveOccurred())
Expect(cg).To(Equal("/user"))
})
It("find 0:: without *:memory:", func() {
cgroupSetup(`0::/user`)
var cg string
err := determineSelfCgroup(&cg)
Expect(err).ToNot(HaveOccurred())
Expect(cg).To(Equal("/user"))
})
})
Describe("determineMemoryLimit", func() {
It("fails for missing files", func() {
limit, err := determineMemoryLimit(``)
Expect(err).To(HaveOccurred())
// it will falls back to memory.stat when memory.limit_in_bytes not found
Expect(err.Error()).To(Equal("open " + procd + "/memory/memory.stat: no such file or directory"))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for missing data in memory.stat file", func() {
memStatSetup(``, ``)
limit, err := determineMemoryLimit(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`no hierarchical memory limit found`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for missing data in v1 file", func() {
memLimitSetup1(``, ``)
limit, err := determineMemoryLimit(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for missing data in v2 file", func() {
memLimitSetup2(``, ``)
limit, err := determineMemoryLimit(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for bogus data in v1 file", func() {
memLimitSetup1(``, `bogus`)
limit, err := determineMemoryLimit(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "bogus": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for bogus data in v2 file", func() {
memLimitSetup2(``, `bogus`)
limit, err := determineMemoryLimit(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "bogus": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("returns v2 data over v1", func() {
memLimitSetup1(``, `1111`)
memLimitSetup2(``, `2222`)
limit, err := determineMemoryLimit(``)
Expect(err).ToNot(HaveOccurred())
Expect(limit).To(BeNumerically("==", 2222))
})
It("returns v1 data when v2 not available", func() {
memLimitSetup1(``, `1111`)
limit, err := determineMemoryLimit(``)
Expect(err).ToNot(HaveOccurred())
Expect(limit).To(BeNumerically("==", 1111))
})
It("returns hierarchyMemoryLimit when limit_in_bytes is unlimited", func() {
memStatSetup(``, `hierarchical_memory_limit 3333`)
limit, err := determineMemoryLimit(``)
Expect(err).ToNot(HaveOccurred())
Expect(limit).To(BeNumerically("==", 3333))
})
It("signals v2 no limit with failure", func() {
memLimitSetup2(``, `max`)
limit, err := determineMemoryLimit(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`no limit`))
Expect(limit).To(BeNumerically("==", 0))
})
})
Describe("determineMemoryUsage", func() {
It("fails for missing files", func() {
limit, err := determineMemoryUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("open " + procd + "/memory/memory.stat: no such file or directory"))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for missing data in v1 file", func() {
memStatSetup(``, ``)
limit, err := determineMemoryUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`no data found`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for missing data in v2 file", func() {
memUsageSetup2(``, ``)
limit, err := determineMemoryUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for bogus data in v1 file", func() {
memStatSetup(``, `total_rss bogus`)
limit, err := determineMemoryUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`no data found`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for bogus data in v2 file", func() {
memUsageSetup2(``, `bogus`)
limit, err := determineMemoryUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "bogus": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("returns v2 data over v1", func() {
memStatSetup(``, `total_rss 1111`)
memUsageSetup2(``, `2222`)
limit, err := determineMemoryUsage(``)
Expect(err).ToNot(HaveOccurred())
Expect(limit).To(BeNumerically("==", 2222))
})
It("returns v1 data when v2 not available", func() {
memStatSetup(``, `total_rss 1111`)
limit, err := determineMemoryUsage(``)
Expect(err).ToNot(HaveOccurred())
Expect(limit).To(BeNumerically("==", 1111))
})
})
Describe("determineSwapUsage", func() {
It("fails for missing files", func() {
limit, err := determineSwapUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("open " + procd + "/memory/memory.stat: no such file or directory"))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for missing data in v1 file", func() {
swapUsageSetup1(``, ``)
limit, err := determineSwapUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`no data found`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for missing data in v2 file", func() {
swapUsageSetup2(``, ``)
limit, err := determineSwapUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for bogus data in v1 file", func() {
swapUsageSetup1(``, `swap bogus`)
limit, err := determineSwapUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`no data found`))
Expect(limit).To(BeNumerically("==", 0))
})
It("fails for bogus data in v2 file", func() {
swapUsageSetup2(``, `bogus`)
limit, err := determineSwapUsage(``)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal(`strconv.ParseUint: parsing "bogus": invalid syntax`))
Expect(limit).To(BeNumerically("==", 0))
})
It("returns v2 data over v1", func() {
swapUsageSetup1(``, `swap 1111`)
swapUsageSetup2(``, `2222`)
limit, err := determineSwapUsage(``)
Expect(err).ToNot(HaveOccurred())
Expect(limit).To(BeNumerically("==", 2222))
})
It("returns v1 data when v2 not available", func() {
swapUsageSetup1(``, `swap 1111`)
limit, err := determineSwapUsage(``)
Expect(err).ToNot(HaveOccurred())
Expect(limit).To(BeNumerically("==", 1111))
})
})
Describe("Mem", func() {
Describe("Without MemAvailable", func() {
BeforeEach(func() {
memInfoSetup(`
MemTotal: 374256 kB
MemFree: 274460 kB
Buffers: 9764 kB
Cached: 38648 kB
SwapCached: 0 kB
Active: 33772 kB
Inactive: 31184 kB
Active(anon): 16572 kB
Inactive(anon): 552 kB
Active(file): 17200 kB
Inactive(file): 30632 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 786428 kB
SwapFree: 786428 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 16564 kB
Mapped: 6612 kB
Shmem: 584 kB
Slab: 19092 kB
SReclaimable: 9128 kB
SUnreclaim: 9964 kB
KernelStack: 672 kB
PageTables: 1864 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 973556 kB
Committed_AS: 55880 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 21428 kB
VmallocChunk: 34359713596 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 59328 kB
DirectMap2M: 333824 kB`)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 374256*1024))
Expect(mem.Free).To(BeNumerically("==", 274460*1024))
Expect(mem.ActualFree).To(BeNumerically("==", 322872*1024))
Expect(mem.ActualUsed).To(BeNumerically("==", 51384*1024))
})
})
Describe("With MemAvailable", func() {
BeforeEach(func() {
memInfoSetup(`
MemTotal: 35008180 kB
MemFree: 487816 kB
MemAvailable: 20913400 kB
Buffers: 249244 kB
Cached: 5064684 kB
SwapCached: 158628 kB
Active: 10974348 kB
Inactive: 7441132 kB
Active(anon): 7921056 kB
Inactive(anon): 5192512 kB
Active(file): 3053292 kB
Inactive(file): 2248620 kB
Unevictable: 4 kB
Mlocked: 4 kB
SwapTotal: 35013660 kB
SwapFree: 33981728 kB
Dirty: 652 kB
Writeback: 0 kB
AnonPages: 12975584 kB
Mapped: 341188 kB
Shmem: 12280 kB
Slab: 15754916 kB
SReclaimable: 15534604 kB
SUnreclaim: 220312 kB
KernelStack: 42960 kB
PageTables: 52744 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 52517748 kB
Committed_AS: 22939984 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 11448320 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 667520 kB
DirectMap2M: 34983936 kB`)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 487816*1024))
Expect(mem.ActualFree).To(BeNumerically("==", 20913400*1024))
Expect(mem.ActualUsed).To(BeNumerically("==", 14094780*1024))
})
})
// Three toggles:
// - MemAvailable present yes/no
// - Cgroup limit valid&sensible yes/no
// - Cgroup swap data present yes/no
// Times two, for cgroup v1 and v2/
//
// Total of 16 tests.
//
// Note that `MemAvailable present yes/no` does not matter in
// the results, as the cgroup derived results will write over
// them. Thus we have 2 groups a 4 tests, with identical
// results for the equivalent tests of each group.
Describe("With MemAvailable. With v1 cgroup limit. With v1 cgroup swap", func() {
// cgroup = '/user'
// The other tests use cgroup = '/'. This reduces the amount of changes needed
BeforeEach(func() {
cgroupSetup(`4:memory:/user`)
memInfoWithMemAvailable()
memLimitSetup1(`/user`, `21390950400`)
memStatWithSwap(`/user`)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("With MemAvailable. With v1 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithMemAvailable()
memLimitSetup1(``, `21390950400`)
memStatWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("With MemAvailable. Overlarge v1 cgroup limit. With v1 cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithMemAvailable()
memLimitSetup1(``, `213909504000000000000`)
memStatWithSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("With MemAvailable. Overlarge v1 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithMemAvailable()
memLimitSetup1(``, `213909504000000000000`)
memStatWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("Without MemAvailable. With v1 cgroup limit. With v1 cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup1(``, `21390950400`)
memStatWithSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("Without MemAvailable. With v1 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup1(``, `21390950400`)
memStatWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("Without MemAvailable. Overlarge v1 cgroup limit. With v1 cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup1(``, `213909504000000000000`)
memStatWithSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("Without MemAvailable. Overlarge v1 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup1(``, `213909504000000000000`)
memStatWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("With MemAvailable. With v2 cgroup limit. With v2 cgroup swap", func() {
// cgroup = '/user'
// The other tests use cgroup = '/'. This reduces the amount of changes needed
BeforeEach(func() {
cgroupSetup(`4:memory:/user`)
memInfoWithMemAvailable()
memLimitSetup2(`/user`, `21390950400`)
memUsageWithSwap(`/user`)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("With MemAvailable. With v2 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithMemAvailable()
memLimitSetup2(``, `21390950400`)
memUsageWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("With MemAvailable. Overlarge v2 cgroup limit. With v2 cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithMemAvailable()
memLimitSetup2(``, `213909504000000000000`)
memUsageWithSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("With MemAvailable. Overlarge v2 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithMemAvailable()
memLimitSetup2(``, `213909504000000000000`)
memUsageWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("Without MemAvailable. With v2 cgroup limit. With v2 cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup2(``, `21390950400`)
memUsageWithSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("Without MemAvailable. With v2 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup2(``, `21390950400`)
memUsageWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 21390950400))
Expect(mem.Free).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 21390950400-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("Without MemAvailable. Overlarge v2 cgroup limit. With v2 cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup2(``, `213909504000000000000`)
memUsageWithSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832-290564089))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832+290564089))
})
})
Describe("Without MemAvailable. Overlarge v2 cgroup limit. Without cgroup swap", func() {
BeforeEach(func() {
cgroupSetup(`4:memory:/`)
memInfoWithoutMemAvailable()
memLimitSetup2(``, `213909504000000000000`)
memUsageWithoutSwap(``)
})
It("returns correct memory info", func() {
mem := Mem{}
err := mem.Get()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualFree).To(BeNumerically("==", 35008180*1024-14108536832))
Expect(mem.ActualUsed).To(BeNumerically("==", 14108536832))
})
})
Describe("When cgroups are enabled but the GetIgnoringCGroups method is called", func() {
// cgroup = '/user'
// The other tests use cgroup = '/'. This reduces the amount of changes needed
BeforeEach(func() {
cgroupSetup(`4:memory:/user`)
memInfoWithMemAvailable()
memLimitSetup2(`/user`, `21390950400`)
memUsageWithSwap(`/user`)
})
It("returns the system memory info", func() {
mem := Mem{}
err := mem.GetIgnoringCGroups()
Expect(err).ToNot(HaveOccurred())
Expect(mem.Total).To(BeNumerically("==", 35008180*1024))
Expect(mem.Free).To(BeNumerically("==", 487816*1024))
Expect(mem.ActualFree).To(BeNumerically("==", 20913400*1024))
Expect(mem.ActualUsed).To(BeNumerically("==", 14433054720))
})
})
})
Describe("Swap", func() {
var meminfoFile string
BeforeEach(func() {
meminfoFile = procd + "/meminfo"
meminfoContents := `
MemTotal: 374256 kB
MemFree: 274460 kB
Buffers: 9764 kB
Cached: 38648 kB
SwapCached: 0 kB
Active: 33772 kB
Inactive: 31184 kB
Active(anon): 16572 kB
Inactive(anon): 552 kB
Active(file): 17200 kB
Inactive(file): 30632 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 786428 kB
SwapFree: 786428 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 16564 kB
Mapped: 6612 kB
Shmem: 584 kB
Slab: 19092 kB
SReclaimable: 9128 kB
SUnreclaim: 9964 kB
KernelStack: 672 kB
PageTables: 1864 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 973556 kB
Committed_AS: 55880 kB