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authorAaron Durbin <adurbin@chromium.org>2013-04-26 20:54:16 -0500
committerRonald G. Minnich <rminnich@gmail.com>2013-05-01 07:16:52 +0200
commit6b0fb0dc3c1cb89af52224a1610daf7b9e943aa6 (patch)
treeb3375943dc0e2ac5c88f075f47dac4dec81ca487 /src/lib/hardwaremain.c
parente850164bac08a5b3b4cd09f587775e68ad1b40c2 (diff)
downloadcoreboot-6b0fb0dc3c1cb89af52224a1610daf7b9e943aa6.tar.xz
boot state: track times for each state
When the MONOTONIC_TIMER is available track the entry, run, and exit times for each state. It should be noted that the times for states that vector to OS or a payload do not have their times reported. Change-Id: I6af23fe011609e0b1e019f35ee40f1fbebd59c9d Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/3156 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/lib/hardwaremain.c')
-rw-r--r--src/lib/hardwaremain.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/src/lib/hardwaremain.c b/src/lib/hardwaremain.c
index ed2a516372..7bf0237f91 100644
--- a/src/lib/hardwaremain.c
+++ b/src/lib/hardwaremain.c
@@ -37,6 +37,7 @@
#if CONFIG_HAVE_ACPI_RESUME
#include <arch/acpi.h>
#endif
+#include <timer.h>
#include <timestamp.h>
#if BOOT_STATE_DEBUG
@@ -58,6 +59,19 @@ static boot_state_t bs_write_tables(void *arg);
static boot_state_t bs_payload_load(void *arg);
static boot_state_t bs_payload_boot(void *arg);
+/*
+ * Typically a state will take 4 time samples:
+ * 1. Before state entry callbacks
+ * 2. After state entry callbacks / Before state function.
+ * 3. After state function / Before state exit callbacks.
+ * 4. After state exit callbacks.
+ */
+#define MAX_TIME_SAMPLES 4
+struct boot_state_times {
+ int num_samples;
+ struct mono_time samples[MAX_TIME_SAMPLES];
+};
+
struct boot_state {
const char *name;
boot_state_t id;
@@ -65,6 +79,9 @@ struct boot_state {
boot_state_t (*run_state)(void *arg);
void *arg;
int complete;
+#if CONFIG_HAVE_MONOTONIC_TIMER
+ struct boot_state_times times;
+#endif
};
#define BS_INIT(state_, run_func_) \
@@ -228,6 +245,39 @@ static boot_state_t bs_payload_boot(void *entry)
return BS_PAYLOAD_BOOT;
}
+#if CONFIG_HAVE_MONOTONIC_TIMER
+static void bs_sample_time(struct boot_state *state)
+{
+ struct mono_time *mt;
+
+ mt = &state->times.samples[state->times.num_samples];
+ timer_monotonic_get(mt);
+ state->times.num_samples++;
+}
+
+static void bs_report_time(struct boot_state *state)
+{
+ struct rela_time entry_time;
+ struct rela_time run_time;
+ struct rela_time exit_time;
+ struct boot_state_times *times;
+
+ times = &state->times;
+ entry_time = mono_time_diff(&times->samples[0], &times->samples[1]);
+ run_time = mono_time_diff(&times->samples[1], &times->samples[2]);
+ exit_time = mono_time_diff(&times->samples[2], &times->samples[3]);
+
+ printk(BIOS_DEBUG, "BS: %s times (us): entry %ld run %ld exit %ld\n",
+ state->name,
+ rela_time_in_microseconds(&entry_time),
+ rela_time_in_microseconds(&run_time),
+ rela_time_in_microseconds(&exit_time));
+}
+#else
+static inline void bs_sample_time(struct boot_state *state) {}
+static inline void bs_report_time(struct boot_state *state) {}
+#endif
+
static void bs_call_callbacks(struct boot_state *state,
boot_state_sequence_t seq)
{
@@ -262,13 +312,25 @@ static void bs_walk_state_machine(boot_state_t current_state_id)
}
printk(BS_DEBUG_LVL, "BS: Entering %s state.\n", state->name);
+
+ bs_sample_time(state);
+
bs_call_callbacks(state, BS_ON_ENTRY);
+ bs_sample_time(state);
+
current_state_id = state->run_state(state->arg);
printk(BS_DEBUG_LVL, "BS: Exiting %s state.\n", state->name);
+
+ bs_sample_time(state);
+
bs_call_callbacks(state, BS_ON_EXIT);
+ bs_sample_time(state);
+
+ bs_report_time(state);
+
state->complete = 1;
}
}