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5a49bb8e88
metrics/process_metrics_linux_test.go
Nikolay 5a49bb8e88
adds extended memory stats (#21)
2021-03-17 23:07:19 +02:00

267 lines
7.4 KiB
Go
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package metrics
import (
"bytes"
"testing"
)
func TestGetPageCacheRSSFromSmapsFailure(t *testing.T) {
f := func(s string) {
t.Helper()
bb := bytes.NewBufferString(s)
_, _, err := getRSSStatsFromSmaps(bb)
if err == nil {
t.Fatalf("expecting non-nil error")
}
}
f("foobar")
// Invalid unit for Rss
f(`7ffcdf335000-7ffcdf337000 r-xp 00000000 00:00 0 [vdso]
Size: 80 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 12 MB
Pss: 0 kB
Shared_Clean: 4 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 0 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 0 kB
VmFlags: rd ex mr mw me de sd
`)
// Invalid unit for Anonymous
f(`7ffcdf335000-7ffcdf337000 r-xp 00000000 00:00 0 [vdso]
Size: 80 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 12 kB
Pss: 0 kB
Shared_Clean: 4 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 5 MB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 0 kB
VmFlags: rd ex mr mw me de sd
`)
// Invalid size for Rss
f(`7ffcdf335000-7ffcdf337000 r-xp 00000000 00:00 0 [vdso]
Size: 80 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 1.2 kB
Pss: 0 kB
Shared_Clean: 4 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 0 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 0 kB
VmFlags: rd ex mr mw me de sd
`)
// Too big size for Rss
f(`7ffcdf335000-7ffcdf337000 r-xp 00000000 00:00 0 [vdso]
Size: 80 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 9999999999999999999 kB
Pss: 0 kB
Shared_Clean: 4 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 0 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 0 kB
VmFlags: rd ex mr mw me de sd
`)
// Partial entry
f(`7ffcdf335000-7ffcdf337000 r-xp 00000000 00:00 0 [vdso]
Size: 80 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 12 kB
Pss: 0 kB
Shared_Clean: 4 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 0 kB
LazyFree: 0 kB
`)
// Partial second entry
f(`7ffcdf335000-7ffcdf337000 r-xp 00000000 00:00 0 [vdso]
Size: 80 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 12 kB
Pss: 0 kB
Shared_Clean: 4 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 0 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 0 kB
VmFlags: rd ex mr mw me de sd
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
Size: 1024 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 120 kB
`)
}
func TestGetPageCacheRSSFromSmapsSuccess(t *testing.T) {
s := `7ffcdf335000-7ffcdf337000 r-xp 00000000 00:00 0 [vdso]
Size: 80 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 12 kB
Pss: 0 kB
Shared_Clean: 4 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 4 kB
Anonymous: 0 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 0 kB
VmFlags: rd ex mr mw me de sd
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
Size: 1024 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 120 kB
Pss: 0 kB
Shared_Clean: 0 kB
Shared_Dirty: 0 kB
Private_Clean: 0 kB
Private_Dirty: 0 kB
Referenced: 0 kB
Anonymous: 1024 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 0 kB
VmFlags: rd ex
`
bb := bytes.NewBufferString(s)
pageCache, anonymous, err := getRSSStatsFromSmaps(bb)
if err != nil {
t.Fatalf("unexpected error: %s", err)
}
expectedPageCache := uint64(12 * 1024)
if pageCache != expectedPageCache {
t.Fatalf("unexpected page cache rss; got %d; want %d", pageCache, expectedPageCache)
}
expectedAnonymous := uint64(120 * 1024)
if anonymous != expectedAnonymous {
t.Fatalf("unexpected anonymous rss; got %d; want %d", anonymous, expectedAnonymous)
}
}
func TestGetMaxFilesLimit(t *testing.T) {
f := func(want uint64, path string, wantErr bool) {
t.Helper()
got, err := getMaxFilesLimit(path)
if err != nil && !wantErr {
t.Fatalf("unexpected error: %v", err)
}
if got != want {
t.Fatalf("unexpected result: %d, want: %d at getMaxFilesLimit", got, want)
}
}
f(1024, "testdata/limits", false)
f(0, "testdata/bad_path", true)
f(0, "testdata/limits_bad", true)
}
func TestGetOpenFDsCount(t *testing.T) {
f := func(want uint64, path string, wantErr bool) {
t.Helper()
got, err := getOpenFDsCount(path)
if (err != nil && !wantErr) || (err == nil && wantErr) {
t.Fatalf("unexpected error: %v", err)
}
if got != want {
t.Fatalf("unexpected result: %d, want: %d at getOpenFDsCount", got, want)
}
}
f(5, "testdata/fd/", false)
f(0, "testdata/fd/0", true)
f(0, "testdata/limits", true)
}
func TestGetMemStats(t *testing.T) {
f := func(want memStats, path string, wantErr bool) {
t.Helper()
got, err := getMemStats(path)
if (err != nil && !wantErr) || (err == nil && wantErr) {
t.Fatalf("unexpected error: %v", err)
}
if got != nil && *got != want {
t.Fatalf("unexpected result: %d, want: %d at getMemStats", *got, want)
}
}
f(memStats{vmPeak: 2130489344, rssPeak: 200679424, rssAnon: 121602048, rssFile: 11362304}, "testdata/status", false)
f(memStats{}, "testdata/status_bad", true)
}
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