lmb

FROM rockylinux:8 AS builder

RUN dnf install -y 'dnf-command(builddep)' 'dnf-command(config-manager)'
RUN dnf config-manager --set-enabled powertools
RUN dnf builddep -y kernel

FROM builder

WORKDIR /tmp
RUN dnf download --source kernel && rpm -ivh kernel*.src.rpm

lmb

#!/bin/bash
# Fiddle with frequency scaling settings to reduce variance when running Go benchmarks.
# Also pins the benchmark to a single CPU.

CPU=${CPU:-1}

original_governor=$(cat /sys/devices/system/cpu/cpu$CPU/cpufreq/scaling_governor)
original_turbo=$(cat /sys/devices/system/cpu/intel_pstate/no_turbo)

disable_turbo() {

lmb

This recipe allows you to use the ssh-agent from nix-env with the auto generated SSH_AUTH_SOCK in /private/tmp. It works because disabling com.openssh.ssh-agent doesn't stop launchd from allocating SSH_AUTH_SOCK. com.nix.ssh-agent spawns a shell to remove the socket and then execute the homebrew ssh-agent.

1. Install openssh from nix: nix-env --install --attr nikpkgs.openssh
2. Disable the built in macOS agent: launchctl disable gui/$UID/com.openssh.ssh-agent
3. Copy com.nix.ssh-agent.plist into ~/Library/LaunchAgents
4. Enable the new agent: launchctl bootstrap gui/$UID ~/Library/LaunchAgents/com.nix.ssh-agent.plist
5. Ensure that the correct agent is running:

lmb

[001]   770.553142:            kvm:kvm_unmap_hva_range: mmu notifier unmap range: 0x007fd650000000 -- 0x007fd654000000
[001]   770.553145:            kvm:kvm_unmap_hva_range: mmu notifier unmap range: 0x007fd64c000000 -- 0x007fd64c200000
[001]   770.553347:           kvm:kvm_write_tsc_offset: vcpu=0 prev=0 next=18446741441723333646
[001]   770.553348:                  kvm:kvm_track_tsc: vcpu_id 0 masterclock 0 offsetmatched 0 nr_online 1 hostclock 0x2
[000]   770.579751:           kvm:kvm_write_tsc_offset: vcpu=0 prev=18446741441723333646 next=18446741441723333646
[000]   770.579752:                  kvm:kvm_track_tsc: vcpu_id 0 masterclock 0 offsetmatched 0 nr_online 1 hostclock 0x2
[000]   770.579757:       kvm:kvm_hv_stimer_set_config: vcpu_id 0 timer 0 config 0x0 host 1
[000]   770.579758:          kvm:kvm_hv_stimer_cleanup: vcpu_id 0 timer 0
[000]   770.579759:       kvm:kvm_hv_stimer_set_config: vcpu_id 0 timer 1 config 0x0 host 1
[000]   770.579759:          kvm:kvm_hv_stimer_cleanup: vcpu_id 0 timer 1

lmb

pub fn Generic(comptime len: usize) var {
    return struct {
        stack: [len]u8,
    };
}

const Thing = Generic(1);

test "crash" {
    Thing.bloop();

lmb

#!/bin/bash

set -euf -o pipefail

pushd "$(mktemp -d)"

echo Working in $PWD

git clone https://github.com/lmb/lmdb.git

lmb

From 5092fd69abc0d9fd81b62a0a00553ace556cbc0a Mon Sep 17 00:00:00 2001
From: Lorenz Bauer <lmb@xxx>
Date: Wed, 15 Feb 2017 18:58:05 +0000
Subject: [PATCH] Use F_SETNOSIGPIPE on OS X

It seems like OS X delivers SIGPIPE to the whole process, instead of the generating thread, as on other UNIXes. Therefore the current code sometimes works, but mostly doesn't, since the call to sigwait doesn't happen quickly enough.

Instead of masking SIGPIPE, we use an OS X specific fcntl to disable SIGPIPE for that particular fd.
---
 libraries/liblmdb/mdb.c | 18 ++++++++----------

lmb

package main

import (
	"fmt"

	"github.com/golang/protobuf/proto"
	"github.com/prometheus/client_golang/prometheus"
	dto "github.com/prometheus/client_model/go"
)

lmb

From 575a1386a9c47e2467e96c9e2be2abf32a56a734 Mon Sep 17 00:00:00 2001
From: Lorenz Bauer <lmb@cloudflare.com>
Date: Sun, 25 Sep 2016 11:11:08 -0700
Subject: [PATCH] Return EPIPE from mdb_env_copyfd2 instead abort on SIGPIPE

---
 libraries/liblmdb/mdb.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c

lmb

/*
 * Copyright 2012 Howard Chu, Symas Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at