mfleming

diff --git a/scripts/runqemu b/scripts/runqemu
index b1d2d1a..aa8a8b9 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -494,13 +494,13 @@ fi
 
 # Specify directory for BIOS, VGA BIOS and keymaps
 if [ ! -z "$CUSTOMBIOSDIR" ]; then
-    if [ -d "$OECORE_NATIVE_SYSROOT/$CUSTOMBIOSDIR" ]; then
-        echo "Assuming biosdir is $OECORE_NATIVE_SYSROOT/$CUSTOMBIOSDIR"

mfleming

struct grub_cpu_idt_descriptor
{
  grub_uint16_t limit;
  grub_uint32_t base;
} __attribute__ ((packed));

static struct grub_cpu_idt_descriptor no_idt __attribute__((aligned(16)));

/* The main routine.  */
void __attribute__ ((noreturn))

mfleming

diff -r 02bc14ed1569 mh.c
--- a/mh.c	Tue Dec 08 09:12:09 2015 -0800
+++ b/mh.c	Sun Jan 15 21:35:48 2017 +0000
@@ -1908,6 +1908,7 @@
   struct maildir *md;		/* list of messages in the mailbox */
   struct maildir **last, *p;
   int i;
+  int count = 0;
   HASH *fnames;			/* hash table for quickly looking up the base filename
 				   for a maildir message */

mfleming

#include <stdint.h>

#define TEN(a) a a a a a a a a a a

static volatile uint64_t  use_result_dummy;
void
use_int(int result) { use_result_dummy += result; }

void
do_int64_mul(unsigned int iterations, unsigned int N)

mfleming

void
do_int64_mul(unsigned int iterations, unsigned int N)
{
	int64_t r = (int64_t)N + 37420;

	r += (int64_t)(N + 6)<<32;
	
	while (iterations-- > 0)
		;
	use_int((int)r);

mfleming

/*
 * Copyright 2020 Matt Fleming
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

mfleming

//
// Compile with:
//
//   g++ clear_user.cc -std=c++11 -isystem <path to googlebenchmark>/include \
//       -L<path to googlebenchmark>/build/src -lbenchmark -lpthread -o clear_user
//

#include <benchmark/benchmark.h>

#define BUF_SIZE (64*1024)

mfleming

clear_user:     file format elf64-x86-64


Disassembly of section .init:

0000000000005718 <_init>:
    5718:	48 83 ec 08          	sub    $0x8,%rsp
    571c:	48 8b 05 c5 08 25 00 	mov    0x2508c5(%rip),%rax        # 255fe8 <__gmon_start__>
    5723:	48 85 c0             	test   %rax,%rax

mfleming

#!/bin/bash

mins=60

echo "Collecting metrics for $mins minutes..."
dstat_outfile="dstat-`hostname`.csv"
echo "Writing dstat output to $dstat_outfile"
dstat --output $dstat_outfile -pmgsdr --disk-util -nyct -C $(seq --separator=, 0 `grep -c processor /proc/cpuinfo`),total 1 $mins &

latency_outfile="jmx-lat-`hostname`.csv"

mfleming

COORD_WRITE_LAT
     101      102      103      104      105      106      107      108      109      110      111      112      113      114      115      116      117      118      119      120      121      122      123      124      125      126      127      128      129      130 
 5542.47  4922.48  5001.43  6273.38  6254.66  6542.20  6649.51  5872.03  7141.65  6697.36  8171.66  7944.98  6181.90  6476.50  7006.39  6407.96  6796.33  6319.05  6846.58  6317.67  6920.60  6291.46  9227.47  6146.82  6789.09  6915.61  6217.61  6291.46  6271.48  6213.78 
 5397.41  5655.43  5061.05  6496.61  6407.96  6547.21  7249.64  6238.36  7773.93  6227.26  9047.71  7843.35  6594.38  6682.45  6543.11  6951.67  6984.87  6765.81  6750.21  6437.77  7340.03  6710.89  7444.89  6375.34  7107.02  6656.18  7340.03  6815.74  6558.04  6188.08 
 5115.78  5056.84  5082.06  6110.67  6193.91  5806.00  7295.41  6045.70  7319.47  5799.27  8609.36  7562.46  6005.48  6075.57  5744.37  7017.39  6943.90  7100.36  6214.73  5856.68  6269.61  6348.