On 20/05/2020 11:38, Chris Wilson wrote:
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.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
---
tools/intel_gpu_top.c | 195 ++++++++++++++++++++++++++++--------------
1 file changed, 133 insertions(+), 62 deletions(-)
diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c
index 8197482dd..e64cec338 100644
--- a/tools/intel_gpu_top.c
+++ b/tools/intel_gpu_top.c
@@ -69,6 +69,12 @@ struct engine {
struct pmu_counter sema;
};
+struct rapl {
+ uint64_t power, type;
+ double scale;
+ int fd;
+};
+
struct engines {
unsigned int num_engines;
unsigned int num_counters;
@@ -76,9 +82,7 @@ struct engines {
int fd;
struct pmu_pair ts;
- int rapl_fd;
- double rapl_scale;
- const char *rapl_unit;
+ struct rapl r_gpu, r_pkg;
int imc_fd;
double imc_reads_scale;
@@ -90,13 +94,124 @@ struct engines {
struct pmu_counter freq_act;
struct pmu_counter irq;
struct pmu_counter rc6;
- struct pmu_counter rapl;
+ struct pmu_counter s_gpu, s_pkg;
struct pmu_counter imc_reads;
struct pmu_counter imc_writes;
struct engine engine;
};
+__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;
+}
It's a bit naughty to add this helper only to be used from RAPL. We
should either consolidate to use this one or have this patch use
existing filenamd_to_* helpers.
+
+static int rapl_parse(struct rapl *r, const char *str)
+{
+ locale_t locale, oldlocale;
+ bool result = true;
+ char buf[128];
+ int dir;
+
+ memset(r, 0, sizeof(*r));
+
+ 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, &r->type) == 1;
+
+ snprintf(buf, sizeof(buf), "events/energy-%s", str);
+ result &= igt_sysfs_scanf(dir, buf, "event=%"PRIx64, &r->power) == 1;
+
+ snprintf(buf, sizeof(buf), "events/energy-%s.scale", str);
+ result &= igt_sysfs_scanf(dir, buf, "%lf", &r->scale) == 1;
+
+ uselocale(oldlocale);
+ freelocale(locale);
+
+ close(dir);
+
+ if (!result)
+ return -EINVAL;
+
+ if (isnan(r->scale) || !r->scale)
+ return -ERANGE;
+
+ return 0;
+}
+
+static int rapl_open(struct rapl *r, const char *domain)
+{
+ r->fd = rapl_parse(r, domain);
+ if (r->fd < 0)
+ goto err;
+
+ r->fd = igt_perf_open(r->type, r->power);
+ if (r->fd < 0) {
+ r->fd = -errno;
+ goto err;
+ }
+
+ return 0;
+
+err:
+ errno = 0;
+ return r->fd;
+}
+
+static int gpu_power_open(struct rapl *r)
+{
+ return rapl_open(r, "gpu");
+}
+
+static int pkg_power_open(struct rapl *r)
+{
+ return rapl_open(r, "pkg");
+}
+
+static inline bool rapl_valid(struct rapl *r)
+{
+ return r->fd >= 0;
+}
+
+static inline int ram_power_open(struct rapl *r)
+{
+ return rapl_open(r, "ram");
+}
+
+static inline void rapl_close(struct rapl *r)
+{
+ close(r->fd);
+ r->fd = -1;
+}
+
static uint64_t
get_pmu_config(int dirfd, const char *name, const char *counter)
{
@@ -338,38 +453,6 @@ 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/"
@@ -496,24 +579,8 @@ static int pmu_init(struct engines *engines)
}
}
- engines->rapl_fd = -1;
- if (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;
- }
+ engines->s_gpu.present = gpu_power_open(&engines->r_gpu) >= 0;
+ engines->s_pkg.present = pkg_power_open(&engines->r_pkg) >= 0;
engines->imc_fd = -1;
if (imc_type_id()) {
@@ -633,9 +700,13 @@ 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->s_gpu.present)
+ __update_sample(&engines->s_gpu,
+ pmu_read_single(engines->r_gpu.fd));
+
+ if (engines->s_pkg.present)
+ __update_sample(&engines->s_pkg,
+ pmu_read_single(engines->r_pkg.fd));
if (engines->imc_fd >= 0) {
pmu_read_multi(engines->imc_fd, 2, val);
@@ -1052,8 +1123,8 @@ print_header(struct engines *engines, double t,
.items = rc6_items,
};
struct cnt_item power_items[] = {
- { &engines->rapl, 4, 2, 1.0, t, engines->rapl_scale, "value",
- "W" },
+ { &engines->s_gpu, 4, 2, 1.0, t, engines->r_gpu.scale, "gpu",
"W" },
+ { &engines->s_pkg, 4, 2, 1.0, t, engines->r_pkg.scale, "pkg",
"W" },
{ NULL, 0, 0, 0.0, 0.0, 0.0, "unit", "W" },
{ },
};
@@ -1083,10 +1154,10 @@ print_header(struct engines *engines, double t,
printf("\033[H\033[J");
if (lines++ < con_h)
- printf("intel-gpu-top - %s/%s MHz; %s%% RC6; %s %s; %s
irqs/s\n",
+ printf("intel-gpu-top - %s/%s MHz; %s%% RC6; %s/%s W; %s
irqs/s\n",
Detecting the unit was also a good thing to have so why drop it?
Regards,
Tvrtko
freq_items[1].buf, freq_items[0].buf,
- rc6_items[0].buf, power_items[0].buf,
- engines->rapl_unit,
+ rc6_items[0].buf,
+ power_items[0].buf, power_items[1].buf,
irq_items[0].buf);
if (lines++ < con_h)
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