[igt-dev] [PATCH i-g-t 1/2] tools/intel_gpu_top: Include total package power
Chris Wilson
chris at chris-wilson.co.uk
Tue Nov 24 23:27:50 UTC 2020
With integrated graphics the TDP is shared between the gpu and the cpu,
knowing the total energy consumed by the package is relevant to
understanding throttling.
v2: Tidy integration by eliminating struct rapl and improve output
formatting.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
tools/intel_gpu_top.c | 218 +++++++++++++++++++++++++-----------------
1 file changed, 130 insertions(+), 88 deletions(-)
diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c
index 86de09aa9..0a49cfecc 100644
--- a/tools/intel_gpu_top.c
+++ b/tools/intel_gpu_top.c
@@ -50,10 +50,12 @@ struct pmu_pair {
};
struct pmu_counter {
- bool present;
+ uint64_t type;
uint64_t config;
unsigned int idx;
struct pmu_pair val;
+ double scale;
+ bool present;
};
struct engine {
@@ -79,8 +81,8 @@ struct engines {
struct pmu_pair ts;
int rapl_fd;
- double rapl_scale;
- const char *rapl_unit;
+ struct pmu_counter r_gpu, r_pkg;
+ unsigned int num_rapl;
int imc_fd;
double imc_reads_scale;
@@ -92,7 +94,6 @@ struct engines {
struct pmu_counter freq_act;
struct pmu_counter irq;
struct pmu_counter rc6;
- struct pmu_counter rapl;
struct pmu_counter imc_reads;
struct pmu_counter imc_writes;
@@ -108,6 +109,109 @@ struct engines {
};
+__attribute__((format(scanf,3,4)))
+static int igt_sysfs_scanf(int dir, const char *attr, const char *fmt, ...)
+{
+ FILE *file;
+ int fd;
+ int ret = -1;
+
+ fd = openat(dir, attr, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ file = fdopen(fd, "r");
+ if (file) {
+ va_list ap;
+
+ va_start(ap, fmt);
+ ret = vfscanf(file, fmt, ap);
+ va_end(ap);
+
+ fclose(file);
+ } else {
+ close(fd);
+ }
+
+ return ret;
+}
+
+static int rapl_parse(struct pmu_counter *pmu, const char *str)
+{
+ locale_t locale, oldlocale;
+ bool result = true;
+ char buf[128] = {};
+ int dir;
+
+ dir = open("/sys/devices/power", O_RDONLY);
+ if (dir < 0)
+ return -errno;
+
+ /* Replace user environment with plain C to match kernel format */
+ locale = newlocale(LC_ALL, "C", 0);
+ oldlocale = uselocale(locale);
+
+ result &= igt_sysfs_scanf(dir, "type", "%"PRIu64, &pmu->type) == 1;
+
+ snprintf(buf, sizeof(buf) - 1, "events/energy-%s", str);
+ result &= igt_sysfs_scanf(dir, buf, "event=%"PRIx64, &pmu->config) == 1;
+
+ snprintf(buf, sizeof(buf) - 1, "events/energy-%s.scale", str);
+ result &= igt_sysfs_scanf(dir, buf, "%lf", &pmu->scale) == 1;
+
+ snprintf(buf, sizeof(buf) - 1, "events/energy-%s.unit", str);
+ if (igt_sysfs_scanf(dir, buf, "%127s", buf) == 1 &&
+ strcmp(buf, "Joules"))
+ fprintf(stderr, "Unexpected units for RAPL %s: found %s\n",
+ str, buf);
+
+ uselocale(oldlocale);
+ freelocale(locale);
+
+ close(dir);
+
+ if (!result)
+ return -EINVAL;
+
+ if (isnan(pmu->scale) || !pmu->scale)
+ return -ERANGE;
+
+ return 0;
+}
+
+static void
+rapl_open(struct pmu_counter *pmu,
+ const char *domain,
+ struct engines *engines)
+{
+ int fd;
+
+ if (rapl_parse(pmu, domain) < 0)
+ return;
+
+ fd = igt_perf_open_group(pmu->type, pmu->config, engines->rapl_fd);
+ if (fd < 0)
+ return;
+
+ if (engines->rapl_fd == -1)
+ engines->rapl_fd = fd;
+
+ pmu->idx = engines->num_rapl++;
+ pmu->present = true;
+}
+
+static void gpu_power_open(struct pmu_counter *pmu,
+ struct engines *engines)
+{
+ rapl_open(pmu, "gpu", engines);
+}
+
+static void pkg_power_open(struct pmu_counter *pmu,
+ struct engines *engines)
+{
+ rapl_open(pmu, "pkg", engines);
+}
+
static uint64_t
get_pmu_config(int dirfd, const char *name, const char *counter)
{
@@ -357,38 +461,6 @@ static double filename_to_double(const char *filename)
return v;
}
-#define RAPL_ROOT "/sys/devices/power/"
-#define RAPL_EVENT "/sys/devices/power/events/"
-
-static uint64_t rapl_type_id(void)
-{
- return filename_to_u64(RAPL_ROOT "type", 10);
-}
-
-static uint64_t rapl_gpu_power(void)
-{
- return filename_to_u64(RAPL_EVENT "energy-gpu", 0);
-}
-
-static double rapl_gpu_power_scale(void)
-{
- return filename_to_double(RAPL_EVENT "energy-gpu.scale");
-}
-
-static const char *rapl_gpu_power_unit(void)
-{
- char buf[32];
-
- if (filename_to_buf(RAPL_EVENT "energy-gpu.unit",
- buf, sizeof(buf)) == 0)
- if (!strcmp(buf, "Joules"))
- return strdup("Watts");
- else
- return strdup(buf);
- else
- return NULL;
-}
-
#define IMC_ROOT "/sys/devices/uncore_imc/"
#define IMC_EVENT "/sys/devices/uncore_imc/events/"
@@ -517,22 +589,9 @@ static int pmu_init(struct engines *engines)
}
engines->rapl_fd = -1;
- if (!engines->discrete && rapl_type_id()) {
- engines->rapl_scale = rapl_gpu_power_scale();
- engines->rapl_unit = rapl_gpu_power_unit();
- if (!engines->rapl_unit)
- return -1;
-
- engines->rapl.config = rapl_gpu_power();
- if (!engines->rapl.config)
- return -1;
-
- engines->rapl_fd = igt_perf_open(rapl_type_id(),
- engines->rapl.config);
- if (engines->rapl_fd < 0)
- return -1;
-
- engines->rapl.present = true;
+ if (!engines->discrete) {
+ gpu_power_open(&engines->r_gpu, engines);
+ pkg_power_open(&engines->r_pkg, engines);
}
engines->imc_fd = -1;
@@ -614,25 +673,6 @@ static void fill_str(char *buf, unsigned int bufsz, char c, unsigned int num)
*buf = 0;
}
-static uint64_t __pmu_read_single(int fd, uint64_t *ts)
-{
- uint64_t data[2] = { };
- ssize_t len;
-
- len = read(fd, data, sizeof(data));
- assert(len == sizeof(data));
-
- if (ts)
- *ts = data[1];
-
- return data[0];
-}
-
-static uint64_t pmu_read_single(int fd)
-{
- return __pmu_read_single(fd, NULL);
-}
-
static void __update_sample(struct pmu_counter *counter, uint64_t val)
{
counter->val.prev = counter->val.cur;
@@ -653,10 +693,6 @@ static void pmu_sample(struct engines *engines)
engines->ts.prev = engines->ts.cur;
- if (engines->rapl_fd >= 0)
- __update_sample(&engines->rapl,
- pmu_read_single(engines->rapl_fd));
-
if (engines->imc_fd >= 0) {
pmu_read_multi(engines->imc_fd, 2, val);
update_sample(&engines->imc_reads, val);
@@ -677,6 +713,12 @@ static void pmu_sample(struct engines *engines)
update_sample(&engine->sema, val);
update_sample(&engine->wait, val);
}
+
+ if (engines->num_rapl) {
+ pmu_read_multi(engines->rapl_fd, engines->num_rapl, val);
+ update_sample(&engines->r_gpu, val);
+ update_sample(&engines->r_pkg, val);
+ }
}
static const char *bars[] = { " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█" };
@@ -1076,14 +1118,14 @@ print_header(const struct igt_device_card *card,
.items = rc6_items,
};
struct cnt_item power_items[] = {
- { &engines->rapl, 4, 2, 1.0, t, engines->rapl_scale, "value",
- "W" },
+ { &engines->r_gpu, 4, 2, 1.0, t, engines->r_gpu.scale, "GPU", "gpu" },
+ { &engines->r_pkg, 4, 2, 1.0, t, engines->r_pkg.scale, "Package", "pkg" },
{ NULL, 0, 0, 0.0, 0.0, 0.0, "unit", "W" },
{ },
};
struct cnt_group power_group = {
.name = "power",
- .display_name = "Power",
+ .display_name = "Power W",
.items = power_items,
};
struct cnt_group *groups[] = {
@@ -1108,17 +1150,17 @@ print_header(const struct igt_device_card *card,
if (lines++ < con_h) {
printf("intel-gpu-top: %s - ", card->card);
- if (!engines->discrete)
- printf("%s/%s MHz; %s%% RC6; %s %s; %s irqs/s\n",
- freq_items[1].buf, freq_items[0].buf,
- rc6_items[0].buf, power_items[0].buf,
- engines->rapl_unit,
- irq_items[0].buf);
- else
- printf("%s/%s MHz; %s%% RC6; %s irqs/s\n",
- freq_items[1].buf, freq_items[0].buf,
- rc6_items[0].buf, irq_items[0].buf);
+ printf("%s/%s MHz; %s%% RC6; ",
+ freq_items[1].buf, freq_items[0].buf,
+ rc6_items[0].buf);
+ if (engines->r_gpu.present) {
+ printf("%s/%s W; ",
+ power_items[0].buf,
+ power_items[1].buf);
+ }
+ printf("%s irqs/s\n", irq_items[0].buf);
}
+
if (lines++ < con_h)
printf("\n");
}
--
2.29.2
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