go, branch main

[DO-NOT-MERGE] all: changes remove name to "up"

2026-04-14T14:51:40Z

Change-Id: If44d06739ba9a9fc2f8b233e958ee5d1b38a525b

[DO-NOT-MERGE] all: add Makefile for common tasks

2026-04-14T14:51:40Z

Change-Id: I2dffb77970d653cdc884bde4c2625293c53a913c

internal/cgrouptest: use t.Cleanup instead of defer in InCgroupV2

2026-04-14T14:51:40Z

Using defer may cause the TestCgroupGOMAXPROCS fail with the following error messages, --- FAIL: TestCgroupGOMAXPROCS (5.14s) crash_test.go:193: running /home/ms/src/go/bin/go build -o /tmp/go-build2154548206/testprog.exe crash_test.go:216: built testprog in 5.13507196s --- FAIL: TestCgroupGOMAXPROCS/containermaxprocs=0 (0.00s) cgroup_linux_test.go:60: /tmp/go-build2154548206/testprog.exe PrintGOMAXPROCS (1.191505ms): ok cgrouptest_linux.go:81: Error removing cgroup directory: remove /sys/fs/cgroup/user.slice/user-1000.slice/user@1000.service/go-cgrouptest4138918176: device or resource busy Under the following environment, - Linux 6.19.9-arch1-1 #1 SMP PREEMPT_DYNAMIC - systemd 260 (260.1-1-arch) Change-Id: Ic36b0b98f0d589ea5730ea35097af04a22dc7469

internal/testenv: exclude GOMAXPROCS when building test program

2026-04-14T14:51:40Z

In the environment where GOMAXPROCS set explicitly, for example to 3 in shell profile, the runtime tests will fail with the following error, ---- ok regexp/syntax 0.428s --- FAIL: TestCgroupGOMAXPROCS (0.81s) crash_test.go:186: running /home/ms/src/go/bin/go build -o /tmp/go-build1753772192/testprog.exe crash_test.go:208: built testprog in 796.664277ms --- FAIL: TestCgroupGOMAXPROCS/containermaxprocs=0 (0.00s) cgroup_linux_test.go:60: /tmp/go-build1753772192/testprog.exe PrintGOMAXPROCS (907.06µs): ok cgroup_linux_test.go:63: output got "3\n" want "4\n" --- FAIL: TestCgroupGOMAXPROCSNoLimit (0.00s) cgroup_linux_test.go:82: /tmp/go-build1753772192/testprog.exe PrintGOMAXPROCS (879.194µs): ok cgroup_linux_test.go:85: output got "3\n" want "4\n" --- FAIL: TestCgroupGOMAXPROCSHigherThanNumCPU (0.00s) cgroup_linux_test.go:102: /tmp/go-build1753772192/testprog.exe PrintGOMAXPROCS (852.396µs): ok cgroup_linux_test.go:105: output got "3\n" want "4\n" --- FAIL: TestCgroupGOMAXPROCSRound (0.01s) --- FAIL: TestCgroupGOMAXPROCSRound/50000 (0.00s) cgroup_linux_test.go:156: /tmp/go-build1753772192/testprog.exe PrintGOMAXPROCS (852.099µs): ok cgroup_linux_test.go:159: output got "3\n" want "2\n" --- FAIL: TestCgroupGOMAXPROCSRound/100000 (0.00s) cgroup_linux_test.go:156: /tmp/go-build1753772192/testprog.exe PrintGOMAXPROCS (894.001µs): ok cgroup_linux_test.go:159: output got "3\n" want "2\n" --- FAIL: TestCgroupGOMAXPROCSRound/150000 (0.00s) cgroup_linux_test.go:156: /tmp/go-build1753772192/testprog.exe PrintGOMAXPROCS (850.897µs): ok cgroup_linux_test.go:159: output got "3\n" want "2\n" --- FAIL: TestCgroupGOMAXPROCSSchedAffinity (0.00s) cgroup_linux_test.go:229: /tmp/go-build1753772192/testprog.exe PrintGOMAXPROCS (867.987µs): ok cgroup_linux_test.go:232: output got "3\n" want "2\n" FAIL FAIL runtime 23.088s ---- This changes exclude the GOMAXPROCS when building program for testing so it does not affect the tests.

all: set codereview remote name to upstream

2026-04-14T14:51:40Z

Change-Id: I474ea1ac91c7e994a1ec7c24ec1ef23bdc0a988f

testing: print the counter if its greater than 1

2026-04-14T14:51:40Z

When test run with "-count=Y" and Y is greater that 1, print a line to indicated the current round of test as "### X/Y".

encoding/json: realign struct encodeState, structFields, and field

2026-04-14T14:51:40Z

This reduce the struct encodeState size from 56 to 16 bytes (-42), struct structFields size from 40 to 24 bytes (-16), and struct field size from 136 to 128 bytes (-8). Benchmark memory profiling before and after, File: json.test Type: alloc_space Time: Jan 25, 2024 at 4:51am (WIB) Showing nodes accounting for -4.01GB, 4.66% of 85.95GB total Dropped 64 nodes (cum <= 0.43GB) flat flat% sum% cum cum% -4.25GB 4.94% 4.94% -4.01GB 4.67% encoding/json.Marshal 0.19GB 0.22% 4.73% 0.24GB 0.28% encoding/json.mapEncoder.encode 0.05GB 0.057% 4.67% 0.05GB 0.057% reflect.copyVal 0.04GB 0.049% 4.62% 0.04GB 0.049% bytes.growSlice -0.04GB 0.045% 4.66% -0.04GB 0.045% encoding/json.RawMessage.MarshalJSON 0 0% 4.66% 0.04GB 0.046% bytes.(*Buffer).WriteString 0 0% 4.66% 0.04GB 0.049% bytes.(*Buffer).grow 0 0% 4.66% -0.04GB 0.045% encoding/json.(*Encoder).Encode 0 0% 4.66% 0.20GB 0.23% encoding/json.(*encodeState).marshal 0 0% 4.66% 0.20GB 0.23% encoding/json.(*encodeState).reflectValue

encoding/json: realign struct UnmarshalTypeError and decodeState

2026-04-14T14:51:40Z

This reduce the UnmarshalTypeError size from 64 to 56 bytes (-8 bytes), and decodeState from 128 to 96 (-32 bytes).

bufio: realign struct Scanner

2026-04-14T14:51:40Z

This reduce the Scanner allocation size from 112 to 72 bytes.

bufio: realign struct Reader

2026-04-14T14:51:40Z

This reduce the Reader allocation size from 72 to 40 bytes and Writer allocation size from 64 to 40 bytes.