svn commit: r362705 - head/bin/ps
Piotr Pawel Stefaniak
pstef at FreeBSD.org
Sat Jun 27 19:09:34 UTC 2020
Author: pstef
Date: Sat Jun 27 19:09:33 2020
New Revision: 362705
URL: https://svnweb.freebsd.org/changeset/base/362705
Log:
ps(1): reuse keyword "cpu" to show CPU number
This flag will now show the processor number on which a process is running.
This change was inspired by PR129965. Initially I didn't think that the
patch attached to it was correct -- it sacrificed ki_estcpu use in "cpu"
for ki_lastcpu and I thought that the old functionality should be kept and
the new (cpu#) one added to it. But I've since discovered that ki_estcpu is
sched_4bsd-specific. What's worse, it represents the same thing as
ki_pctcpu, except ki_pctcpu is universal -- so "%cpu" has been using it
successfully. Therefore, I've decided to replace information based on
ki_estcpu with information based on ki_oncpu/ki_lastcpu.
Key parts of the code and manual changes were borrowed from top(1).
PR: 129965
Reported by: Nikola Knežević
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25377
Modified:
head/bin/ps/extern.h
head/bin/ps/keyword.c
head/bin/ps/print.c
head/bin/ps/ps.1
head/bin/ps/ps.c
Modified: head/bin/ps/extern.h
==============================================================================
--- head/bin/ps/extern.h Sat Jun 27 18:35:00 2020 (r362704)
+++ head/bin/ps/extern.h Sat Jun 27 19:09:33 2020 (r362705)
@@ -41,13 +41,14 @@ extern fixpt_t ccpu;
extern int cflag, eval, fscale, nlistread, rawcpu;
extern unsigned long mempages;
extern time_t now;
-extern int showthreads, sumrusage, termwidth;
+extern int showthreads, sumrusage, termwidth, smp;
extern STAILQ_HEAD(velisthead, varent) varlist;
__BEGIN_DECLS
char *arguments(KINFO *, VARENT *);
char *command(KINFO *, VARENT *);
char *cputime(KINFO *, VARENT *);
+char *cpunum(KINFO *, VARENT *);
int donlist(void);
char *elapsed(KINFO *, VARENT *);
char *elapseds(KINFO *, VARENT *);
Modified: head/bin/ps/keyword.c
==============================================================================
--- head/bin/ps/keyword.c Sat Jun 27 18:35:00 2020 (r362704)
+++ head/bin/ps/keyword.c Sat Jun 27 19:09:33 2020 (r362705)
@@ -83,8 +83,7 @@ static VAR var[] = {
CHAR, NULL, 0},
{"cow", "COW", NULL, "copy-on-write-faults", 0, kvar, KOFF(ki_cow),
UINT, "u", 0},
- {"cpu", "CPU", NULL, "cpu-usage", 0, kvar, KOFF(ki_estcpu), UINT, "d",
- 0},
+ {"cpu", "C", NULL, "on-cpu", 0, cpunum, 0, CHAR, NULL, 0},
{"cputime", "", "time", NULL, 0, NULL, 0, CHAR, NULL, 0},
{"dsiz", "DSIZ", NULL, "data-size", 0, kvar, KOFF(ki_dsize), PGTOK,
"ld", 0},
Modified: head/bin/ps/print.c
==============================================================================
--- head/bin/ps/print.c Sat Jun 27 18:35:00 2020 (r362704)
+++ head/bin/ps/print.c Sat Jun 27 19:09:33 2020 (r362705)
@@ -551,6 +551,22 @@ cputime(KINFO *k, VARENT *ve)
}
char *
+cpunum(KINFO *k, VARENT *ve __unused)
+{
+ char *cpu;
+
+ if (!smp)
+ return (NULL);
+
+ if (k->ki_p->ki_stat == SRUN && k->ki_p->ki_oncpu != NOCPU) {
+ asprintf(&cpu, "%d", k->ki_p->ki_oncpu);
+ } else {
+ asprintf(&cpu, "%d", k->ki_p->ki_lastcpu);
+ }
+ return (cpu);
+}
+
+char *
systime(KINFO *k, VARENT *ve)
{
long secs, psecs;
Modified: head/bin/ps/ps.1
==============================================================================
--- head/bin/ps/ps.1 Sat Jun 27 18:35:00 2020 (r362704)
+++ head/bin/ps/ps.1 Sat Jun 27 19:09:33 2020 (r362705)
@@ -29,7 +29,7 @@
.\" @(#)ps.1 8.3 (Berkeley) 4/18/94
.\" $FreeBSD$
.\"
-.Dd October 31, 2018
+.Dd June 27, 2020
.Dt PS 1
.Os
.Sh NAME
@@ -545,7 +545,8 @@ command and arguments
.It Cm cow
number of copy-on-write faults
.It Cm cpu
-short-term CPU usage factor (for scheduling)
+The processor number on which the process is executing (visible only on SMP
+systems).
.It Cm dsiz
data size (in Kbytes)
.It Cm emul
Modified: head/bin/ps/ps.c
==============================================================================
--- head/bin/ps/ps.c Sat Jun 27 18:35:00 2020 (r362704)
+++ head/bin/ps/ps.c Sat Jun 27 19:09:33 2020 (r362705)
@@ -105,6 +105,7 @@ int rawcpu; /* -C */
int sumrusage; /* -S */
int termwidth; /* Width of the screen (0 == infinity). */
int showthreads; /* will threads be shown? */
+int smp; /* multi-processor support */
struct velisthead varlist = STAILQ_HEAD_INITIALIZER(varlist);
@@ -157,6 +158,7 @@ static void saveuser(KINFO *);
static void scanvars(void);
static void sizevars(void);
static void pidmax_init(void);
+static void smp_init(void);
static void usage(void);
static char dfmt[] = "pid,tt,state,time,command";
@@ -226,6 +228,7 @@ main(int argc, char *argv[])
argv[1] = kludge_oldps_options(PS_ARGS, argv[1], argv[2]);
pidmax_init();
+ smp_init();
all = descendancy = _fmt = nselectors = optfatal = 0;
prtheader = showthreads = wflag = xkeep_implied = 0;
@@ -1454,6 +1457,18 @@ pidmax_init(void)
xo_warn("unable to read kern.pid_max");
pid_max = 99999;
}
+}
+
+static void
+smp_init(void)
+{
+ size_t size;
+
+ size = sizeof(smp);
+ if ((sysctlbyname("machdep.smp_active", &smp, &size, NULL, 0) != 0 &&
+ sysctlbyname("kern.smp.active", &smp, &size, NULL, 0) != 0) ||
+ size != sizeof(smp))
+ smp = 0;
}
static void __dead2
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