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Add a basic set of data points which count the number of sleep entries

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that are being done by the OS.

For now this'll match up with the "wakeups"; although I'll dig deeper into
this to see if we can determine which sleep state the CPU managed to get
into.  Most things I've seen these days only expose up to C2 or C3 via
ACPI even though the CPU goes all the way down to C6 or C7.
This commit is contained in:
Adrian Chadd 2014-04-08 02:36:27 +00:00
parent cfac59ecb1
commit 0d4700544f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=264250
1 changed files with 35 additions and 0 deletions
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35
sys/dev/acpica/acpi_cpu.c
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@ -172,6 +172,7 @@ static void acpi_cpu_idle(sbintime_t sbt);
static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context);
static int acpi_cpu_quirks(void);
static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_cpu_usage_counters_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc);
static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS);
@ -938,6 +939,11 @@ acpi_cpu_startup_cx(struct acpi_cpu_softc *sc)
OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD,
(void *)sc, 0, acpi_cpu_usage_sysctl, "A",
"percent usage for each Cx state");
SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)),
OID_AUTO, "cx_usage_counters", CTLTYPE_STRING | CTLFLAG_RD,
(void *)sc, 0, acpi_cpu_usage_counters_sysctl, "A",
"Cx sleep state counters");
/* Signal platform that we can handle _CST notification. */
if (!cpu_cx_generic && cpu_cst_cnt != 0) {
@ -1237,6 +1243,35 @@ acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS)
return (0);
}
/*
* XXX TODO: actually add support to count each entry/exit
* from the Cx states.
*/
static int
acpi_cpu_usage_counters_sysctl(SYSCTL_HANDLER_ARGS)
{
struct acpi_cpu_softc *sc;
struct sbuf sb;
char buf[128];
int i;
sc = (struct acpi_cpu_softc *) arg1;
/* Print out the raw counters */
sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
for (i = 0; i < sc->cpu_cx_count; i++) {
sbuf_printf(&sb, "%u ", sc->cpu_cx_stats[i]);
}
sbuf_trim(&sb);
sbuf_finish(&sb);
sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
sbuf_delete(&sb);
return (0);
}
static int
acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc)
{