This commit fixes an issue in the power library
related to using lcores mapped to different
physical cores (--lcores option in EAL).
Previously, the power library incorrectly accessed
CPU sysfs attributes for power management, treating
lcore IDs as CPU IDs.
e.g. with --lcores '1@128', lcore_id '1' was interpreted
as CPU_id instead of '128'.
This patch corrects the cpu_id based on lcore and CPU
mappings. It also constraints power management support
for lcores mapped to multiple physical cores/threads.
When multiple lcores are mapped to the same physical core,
invoking frequency scaling APIs on any lcore will apply the
changes effectively.
Signed-off-by: Sivaprasad Tummala <sivaprasad.tumm...@amd.com>
---
lib/power/power_acpi_cpufreq.c | 7 ++++++-
lib/power/power_amd_pstate_cpufreq.c | 7 ++++++-
lib/power/power_common.c | 23 +++++++++++++++++++++++
lib/power/power_common.h | 2 +-
lib/power/power_cppc_cpufreq.c | 7 ++++++-
lib/power/power_pstate_cpufreq.c | 7 ++++++-
6 files changed, 48 insertions(+), 5 deletions(-)
diff --git a/lib/power/power_acpi_cpufreq.c b/lib/power/power_acpi_cpufreq.c
index 81996e1c13..259bc8a263 100644
--- a/lib/power/power_acpi_cpufreq.c
+++ b/lib/power/power_acpi_cpufreq.c
@@ -258,7 +258,12 @@ power_acpi_cpufreq_init(unsigned int lcore_id)
return -1;
}
- pi->lcore_id = lcore_id;
+ if (check_lcore_and_set_cpu(lcore_id, &pi->lcore_id) < 0) {
+ POWER_LOG(ERR,
+ "Cannot get cpu id mapped for lcore %u", lcore_id);
+ return -1;
+ }
+
/* Check and set the governor */
if (power_set_governor_userspace(pi) < 0) {
POWER_LOG(ERR, "Cannot set governor of lcore %u to "
diff --git a/lib/power/power_amd_pstate_cpufreq.c
b/lib/power/power_amd_pstate_cpufreq.c
index 090a0d96cb..9bfb271bb7 100644
--- a/lib/power/power_amd_pstate_cpufreq.c
+++ b/lib/power/power_amd_pstate_cpufreq.c
@@ -376,7 +376,12 @@ power_amd_pstate_cpufreq_init(unsigned int lcore_id)
return -1;
}
- pi->lcore_id = lcore_id;
+ if (check_lcore_and_set_cpu(lcore_id, &pi->lcore_id) < 0) {
+ POWER_LOG(ERR,
+ "Cannot get cpu id mapped for lcore %u", lcore_id);
+ return -1;
+ }
+
/* Check and set the governor */
if (power_set_governor_userspace(pi) < 0) {
POWER_LOG(ERR, "Cannot set governor of lcore %u to "
diff --git a/lib/power/power_common.c b/lib/power/power_common.c
index 590986d5ef..a8d5cd1c50 100644
--- a/lib/power/power_common.c
+++ b/lib/power/power_common.c
@@ -9,6 +9,7 @@
#include <rte_log.h>
#include <rte_string_fns.h>
+#include <rte_lcore.h>
#include "power_common.h"
@@ -204,3 +205,25 @@ power_set_governor(unsigned int lcore_id, const char
*new_governor,
return ret;
}
+
+int check_lcore_and_set_cpu(uint32_t lcore_id, uint32_t *cpu_id)
+{
+ rte_cpuset_t lcore_cpus;
+ uint32_t cpu;
+
+ lcore_cpus = rte_lcore_cpuset(lcore_id);
+ if (CPU_COUNT(&lcore_cpus) != 1) {
+ POWER_LOG(ERR,
+ "Power library does not support lcore %u mapping to %u
cpus",
+ lcore_id, CPU_COUNT(&lcore_cpus));
+ return -1;
+ }
+
+ for (cpu = 0; cpu < CPU_SETSIZE; cpu++) {
+ if (CPU_ISSET(cpu, &lcore_cpus))
+ break;
+ }
+ *cpu_id = cpu;
+
+ return 0;
+}
diff --git a/lib/power/power_common.h b/lib/power/power_common.h
index 83f742f42a..c5034104d0 100644
--- a/lib/power/power_common.h
+++ b/lib/power/power_common.h
@@ -31,5 +31,5 @@ int open_core_sysfs_file(FILE **f, const char *mode, const
char *format, ...)
int read_core_sysfs_u32(FILE *f, uint32_t *val);
int read_core_sysfs_s(FILE *f, char *buf, unsigned int len);
int write_core_sysfs_s(FILE *f, const char *str);
-
+int check_lcore_and_set_cpu(uint32_t lcore_id, uint32_t *cpu_id);
#endif /* _POWER_COMMON_H_ */
diff --git a/lib/power/power_cppc_cpufreq.c b/lib/power/power_cppc_cpufreq.c
index 32aaacb948..0a1d723bae 100644
--- a/lib/power/power_cppc_cpufreq.c
+++ b/lib/power/power_cppc_cpufreq.c
@@ -362,7 +362,12 @@ power_cppc_cpufreq_init(unsigned int lcore_id)
return -1;
}
- pi->lcore_id = lcore_id;
+ if (check_lcore_and_set_cpu(lcore_id, &pi->lcore_id) < 0) {
+ POWER_LOG(ERR,
+ "Cannot get cpu id mapped for lcore %u", lcore_id);
+ return -1;
+ }
+
/* Check and set the governor */
if (power_set_governor_userspace(pi) < 0) {
POWER_LOG(ERR, "Cannot set governor of lcore %u to "
diff --git a/lib/power/power_pstate_cpufreq.c b/lib/power/power_pstate_cpufreq.c
index 2343121621..116b130be2 100644
--- a/lib/power/power_pstate_cpufreq.c
+++ b/lib/power/power_pstate_cpufreq.c
@@ -564,7 +564,12 @@ power_pstate_cpufreq_init(unsigned int lcore_id)
return -1;
}
- pi->lcore_id = lcore_id;
+ if (check_lcore_and_set_cpu(lcore_id, &pi->lcore_id) < 0) {
+ POWER_LOG(ERR,
+ "Cannot get cpu id mapped for lcore %u", lcore_id);
+ return -1;
+ }
+
/* Check and set the governor */
if (power_set_governor_performance(pi) < 0) {
POWER_LOG(ERR, "Cannot set governor of lcore %u to "
--
2.34.1
