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util-linux/0062-lscpu-add-SCALMHZ-and-CPU-scaling-MHz.patch
Karel Zak 6f0dbde58a RHEL-9.4.0: lscpu, logger, libblkid, libmount-monitor (2.37.4-16) 
Resolves: RHEL-12783 RHEL-14612 RHEL-16048 RHEL-16071 RHEL-21257
2024-02-07 11:52:19 +01:00

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From 4559d65f2a00d57f7fa21339370bb93d89a69c46 Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Mon, 24 May 2021 12:24:33 +0200
Subject: lscpu: add SCALMHZ% and "CPU scaling MHz:"
$ lscpu
...
Model name: Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
CPU family: 6
Model: 60
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 1
Stepping: 3
CPU(s) scaling MHz: 61%
CPU max MHz: 4400.0000
CPU min MHz: 800.0000
...
$ lscpu -e=CPU,MAXMHZ,MINMHZ,MHZ,SCALMHZ%
CPU MAXMHZ MINMHZ MHZ SCALMHZ%
0 4400.0000 800.0000 2800.000 64%
1 4400.0000 800.0000 4000.146 91%
2 4400.0000 800.0000 2800.000 64%
3 4400.0000 800.0000 2800.000 64%
4 4400.0000 800.0000 2800.000 64%
5 4400.0000 800.0000 4400.000 100%
6 4400.0000 800.0000 800.000 18%
7 4400.0000 800.0000 2800.000 64%
iAddresses: https://issues.redhat.com/browse/RHEL-12783
Upstream: http://github.com/util-linux/util-linux/commit/9b9e4f5d06be55f4b9e1a52b448055933df92c6b
Addresses: https://github.com/karelzak/util-linux/issues/1314
Signed-off-by: Karel Zak <kzak@redhat.com>
---
Documentation/TODO | 1 +
sys-utils/lscpu-cputype.c | 6 ++++++
sys-utils/lscpu-topology.c | 21 +++++++++++++++++++++
sys-utils/lscpu.c | 9 +++++++++
sys-utils/lscpu.h | 4 +++-
5 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/Documentation/TODO b/Documentation/TODO
index 33ffa189d..e382e4b97 100644
--- a/Documentation/TODO
+++ b/Documentation/TODO
@@ -53,6 +53,7 @@ cal
lscpu
-----
+ - add --freq output to visualise CPU use, see https://github.com/karelzak/util-linux/issues/1314
- read cpuid and uname information from file if --sysroot is specified, then
we can prepare regression tests completely independent on hw and architecture.
diff --git a/sys-utils/lscpu-cputype.c b/sys-utils/lscpu-cputype.c
index 7b5b109c9..dd0c86084 100644
--- a/sys-utils/lscpu-cputype.c
+++ b/sys-utils/lscpu-cputype.c
@@ -530,6 +530,12 @@ int lscpu_read_cpuinfo(struct lscpu_cxt *cxt)
pr->curr_type->static_mhz = xstrdup(value);
if (pattern->id == PAT_BOGOMIPS_CPU && pr->curr_type && !pr->curr_type->bogomips)
pr->curr_type->bogomips = xstrdup(value);
+ if (pattern->id == PAT_MHZ && pr->curr_cpu && value) {
+ errno = 0;
+ pr->curr_cpu->mhz_cur_freq = strtof(value, NULL);
+ if (errno)
+ pr->curr_cpu->mhz_cur_freq = 0;
+ }
break;
case CPUINFO_LINE_CPUTYPE:
if (pr->curr_type && is_different_cputype(pr->curr_type, pattern->offset, value)) {
diff --git a/sys-utils/lscpu-topology.c b/sys-utils/lscpu-topology.c
index f4e8181b7..bba727643 100644
--- a/sys-utils/lscpu-topology.c
+++ b/sys-utils/lscpu-topology.c
@@ -588,6 +588,27 @@ float lsblk_cputype_get_minmhz(struct lscpu_cxt *cxt, struct lscpu_cputype *ct)
return res;
}
+/* returns scaling (use) of CPUs freq. in percent */
+float lsblk_cputype_get_scalmhz(struct lscpu_cxt *cxt, struct lscpu_cputype *ct)
+{
+ size_t i;
+ float fmax = 0, fcur = 0;
+
+ for (i = 0; i < cxt->npossibles; i++) {
+ struct lscpu_cpu *cpu = cxt->cpus[i];
+
+ if (!cpu || cpu->type != ct || !is_cpu_present(cxt, cpu))
+ continue;
+ if (cpu->mhz_max_freq <= 0.0 || cpu->mhz_cur_freq <= 0.0)
+ continue;
+ fmax += cpu->mhz_max_freq;
+ fcur += cpu->mhz_cur_freq;
+ }
+ if (fcur <= 0.0)
+ return 0.0;
+ return fcur / fmax * 100;
+}
+
int lscpu_read_topology(struct lscpu_cxt *cxt)
{
size_t i;
diff --git a/sys-utils/lscpu.c b/sys-utils/lscpu.c
index 8829098aa..47dd9d72f 100644
--- a/sys-utils/lscpu.c
+++ b/sys-utils/lscpu.c
@@ -105,6 +105,7 @@ enum {
COL_CPU_CONFIGURED,
COL_CPU_ONLINE,
COL_CPU_MHZ,
+ COL_CPU_SCALMHZ,
COL_CPU_MAXMHZ,
COL_CPU_MINMHZ,
};
@@ -150,6 +151,7 @@ static struct lscpu_coldesc coldescs_cpu[] =
[COL_CPU_CONFIGURED] = { "CONFIGURED", N_("shows if the hypervisor has allocated the CPU") },
[COL_CPU_ONLINE] = { "ONLINE", N_("shows if Linux currently makes use of the CPU"), SCOLS_FL_RIGHT },
[COL_CPU_MHZ] = { "MHZ", N_("shows the currently MHz of the CPU"), SCOLS_FL_RIGHT },
+ [COL_CPU_SCALMHZ] = { "SCALMHZ%", N_("shows scaling percentage of the CPU frequency"), SCOLS_FL_RIGHT },
[COL_CPU_MAXMHZ] = { "MAXMHZ", N_("shows the maximum MHz of the CPU"), SCOLS_FL_RIGHT },
[COL_CPU_MINMHZ] = { "MINMHZ", N_("shows the minimum MHz of the CPU"), SCOLS_FL_RIGHT }
};
@@ -425,6 +427,10 @@ static char *get_cell_data(
if (cpu->mhz)
xstrncpy(buf, cpu->mhz, bufsz);
break;
+ case COL_CPU_SCALMHZ:
+ if (cpu->mhz_cur_freq && cpu->mhz_max_freq)
+ snprintf(buf, bufsz, "%.0f%%", cpu->mhz_cur_freq / cpu->mhz_max_freq * 100);
+ break;
case COL_CPU_MAXMHZ:
if (cpu->mhz_max_freq)
snprintf(buf, bufsz, "%.4f", cpu->mhz_max_freq);
@@ -890,6 +896,9 @@ print_summary_cputype(struct lscpu_cxt *cxt,
add_summary_s(tb, sec, _("CPU static MHz:"), ct->static_mhz);
if (ct->has_freq) {
+ float scal = lsblk_cputype_get_scalmhz(cxt, ct);
+ if (scal > 0.0)
+ add_summary_x(tb, sec, _("CPU(s) scaling MHz:"), "%.0f%%", scal);
add_summary_x(tb, sec, _("CPU max MHz:"), "%.4f", lsblk_cputype_get_maxmhz(cxt, ct));
add_summary_x(tb, sec, _("CPU min MHz:"), "%.4f", lsblk_cputype_get_minmhz(cxt, ct));
}
diff --git a/sys-utils/lscpu.h b/sys-utils/lscpu.h
index e52c77c22..62f532581 100644
--- a/sys-utils/lscpu.h
+++ b/sys-utils/lscpu.h
@@ -127,11 +127,12 @@ struct lscpu_cpu {
int logical_id;
char *bogomips; /* per-CPU bogomips */
- char *mhz; /* max freq from cpuinfo */
+ char *mhz; /* freq from cpuinfo */
char *dynamic_mhz; /* from cpuinf for s390 */
char *static_mhz; /* from cpuinf for s390 */
float mhz_max_freq; /* realtime freq from /sys/.../cpuinfo_max_freq */
float mhz_min_freq; /* realtime freq from /sys/.../cpuinfo_min_freq */
+ float mhz_cur_freq;
int coreid;
int socketid;
@@ -280,6 +281,7 @@ void lscpu_cputype_free_topology(struct lscpu_cputype *ct);
float lsblk_cputype_get_maxmhz(struct lscpu_cxt *cxt, struct lscpu_cputype *ct);
float lsblk_cputype_get_minmhz(struct lscpu_cxt *cxt, struct lscpu_cputype *ct);
+float lsblk_cputype_get_scalmhz(struct lscpu_cxt *cxt, struct lscpu_cputype *ct);
struct lscpu_arch *lscpu_read_architecture(struct lscpu_cxt *cxt);
void lscpu_free_architecture(struct lscpu_arch *ar);
--
2.43.0
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