dilim/systemd
1
0
Fork 0
mirror of https://github.com/systemd/systemd.git synced 2026-08-03 22:50:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

basic: delete loadavg.h copy

Browse Source 
loadavg.h is an internal header of the Linux source repository, and as
such it is licensed as GPLv2-only, without syscall exception.

We use it only for 4 macros, which are simply doing some math calculations
that cannot thus be subject to copyright.
Reimplement the same calculations in another internal header and delete
loadavg.h from our tree.
This commit is contained in:
Luca Boccassi
2021-09-24 17:28:27 +01:00
committed by Yu Watanabe
parent 3f67dccca0
commit f0e2cfc6dc
9 changed files with 57 additions and 105 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
src/basic/linux/loadavg.h
View File

@@ -1,48 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SCHED_LOADAVG_H
#define _LINUX_SCHED_LOADAVG_H
/*
* These are the constant used to fake the fixed-point load-average
* counting. Some notes:
* - 11 bit fractions expand to 22 bits by the multiplies: this gives
* a load-average precision of 10 bits integer + 11 bits fractional
* - if you want to count load-averages more often, you need more
* precision, or rounding will get you. With 2-second counting freq,
* the EXP_n values would be 1981, 2034 and 2043 if still using only
* 11 bit fractions.
*/
extern unsigned long avenrun[]; /* Load averages */
extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);
#define FSHIFT 11 /* nr of bits of precision */
#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
#define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
#define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
#define EXP_5 2014 /* 1/exp(5sec/5min) */
#define EXP_15 2037 /* 1/exp(5sec/15min) */
/*
* a1 = a0 * e + a * (1 - e)
*/
static inline unsigned long
calc_load(unsigned long load, unsigned long exp, unsigned long active)
{
unsigned long newload;
newload = load * exp + active * (FIXED_1 - exp);
if (active >= load)
newload += FIXED_1-1;
return newload / FIXED_1;
}
extern unsigned long calc_load_n(unsigned long load, unsigned long exp,
unsigned long active, unsigned int n);
#define LOAD_INT(x) ((x) >> FSHIFT)
#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
extern void calc_global_load(void);
#endif /* _LINUX_SCHED_LOADAVG_H */

6
src/basic/linux/update.sh
View File

@@ -4,11 +4,7 @@ set -eu
set -o pipefail
for i in *.h */*.h; do
if [[ "$i" == "loadavg.h" ]]; then
curl --fail "https://raw.githubusercontent.com/torvalds/linux/master/include/linux/sched/$i" -o "$i"
else
curl --fail "https://raw.githubusercontent.com/torvalds/linux/master/include/uapi/linux/$i" -o "$i"
fi
curl --fail "https://raw.githubusercontent.com/torvalds/linux/master/include/uapi/linux/$i" -o "$i"
sed -i -e 's/__user //g' -e '/^#include <linux\/compiler.h>/ d' "$i"
done