Re: [Intel-gfx] [igt-dev] [PATCH i-g-t 1/1] intel-gpu-top: Support for client stats

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

On 07/09/2020 10:31, Petri Latvala wrote:
> On Fri, Sep 04, 2020 at 02:06:07PM +0100, Tvrtko Ursulin wrote:
>> From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>>
>> Adds support for per-client engine busyness stats i915 exports in sysfs
>> and produces output like the below:
>>
>> ==========================================================================
>> intel-gpu-top -  935/ 935 MHz;    0% RC6; 14.73 Watts;     1097 irqs/s
>>
>>        IMC reads:     1401 MiB/s
>>       IMC writes:        4 MiB/s
>>
>>            ENGINE      BUSY                                 MI_SEMA MI_WAIT
>>       Render/3D/0   63.73% |███████████████████           |      3%      0%
>>         Blitter/0    9.53% |██▊                           |      6%      0%
>>           Video/0   39.32% |███████████▊                  |     16%      0%
>>           Video/1   15.62% |████▋                         |      0%      0%
>>    VideoEnhance/0    0.00% |                              |      0%      0%
>>
>>    PID            NAME     RCS          BCS          VCS         VECS
>>   4084        gem_wsim |█████▌     ||█          ||           ||           |
>>   4086        gem_wsim |█▌         ||           ||███        ||           |
>> ==========================================================================
>>
>> Apart from the existing physical engine utilization it now also shows
>> utilization per client and per engine class.
>>
>> v2:
>>   * Version to match removal of global enable_stats toggle.
>>   * Plus various fixes.
>>
>> v3:
>>   * Support brief backward jumps in client stats.
>>
>> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>> ---
>>   tools/intel_gpu_top.c | 539 +++++++++++++++++++++++++++++++++++++++++-
>>   1 file changed, 528 insertions(+), 11 deletions(-)
>>
>> diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c
>> index cae01c25b920..9eac569e75de 100644
>> --- a/tools/intel_gpu_top.c
>> +++ b/tools/intel_gpu_top.c
>> @@ -679,23 +679,347 @@ static void pmu_sample(struct engines *engines)
>>   	}
>>   }
>>   
>> +enum client_status {
>> +	FREE = 0, /* mbz */
>> +	ALIVE,
>> +	PROBE
>> +};
>> +
>> +struct clients;
>> +
>> +struct client {
>> +	struct clients *clients;
>> +
>> +	enum client_status status;
>> +	unsigned int id;
>> +	unsigned int pid;
>> +	char name[128];
>> +	unsigned int samples;
>> +	unsigned long total;
>> +	struct engines *engines;
>> +	unsigned long *val;
>> +	uint64_t *last;
>> +};
>> +
>> +struct engine_class {
>> +	unsigned int class;
>> +	const char *name;
>> +	unsigned int num_engines;
>> +};
>> +
>> +struct clients {
>> +	unsigned int num_classes;
>> +	struct engine_class *class;
>> +
>> +	unsigned int num_clients;
>> +	struct client *client;
>> +};
>> +
>> +#define for_each_client(clients, c, tmp) \
>> +	for ((tmp) = (clients)->num_clients, c = (clients)->client; \
>> +	     (tmp > 0); (tmp)--, (c)++)
>> +
>> +static struct clients *init_clients(void)
>> +{
>> +	struct clients *clients = malloc(sizeof(*clients));
>> +
>> +	return memset(clients, 0, sizeof(*clients));
>> +}
>> +
>> +#define SYSFS_CLIENTS "/sys/class/drm/card0/clients"
> 
> Now that intel_gpu_top supports device selection, this path works
> every time only 60% of the time, right?

Gah yes.. thanks. I cherry picked from the wrong branch. I did already 
have this updated for device selection, somewhere. Will find it.

Regards,

Tvrtko
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