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lat all stats <core_id> <task_id> combines "lat stats" and "lat packets" within one command.
This command returns:
- One line in case the core_task parser fails. In that case the line will start with: "error: invalid syntax"
- One set of lines for each core task:
- if core/task is invalid, or not running lat mode, the line will contain (start with) "error...". this will be the only line for that core/task.
- Otherwise the set of lines will be:
- One line as returned by "lat stats". This line will be
- One line starting with "error" in case of error, or
- One line containing lat_min_usec, lat_max_usec, lat_avg_usec, tot_lat_min_usec, tot_lat_max_usec, last_tsc, rte_get_tsc_hz(), lcore_id, task_id
- The return from lat packets i.e.
- One line starting with "error" in case of error, or
- 128 lines - one for each bucket - as returned by "lat packets" command
This command is more useful then lat packets, as it contains the tsc - needed to see whether the sample is new or not.
Change-Id: I04231aa7c5bd2d352ed6f94d40e88d3b411ce744
Signed-off-by: Xavier Simonart <xavier.simonart@intel.com>
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- Latency Distribution (i.e. histograms) has been added when latency is enabled.
- Histograms are now compiled by default.
- A bug has also been fixed, which was causing strange behavior in the histograms
(due to bucket size being overwritten).
- The default bucket size has been changed to "11" which means that the size of each bucket
is now (1 cycle << 11) = 2048 cycles = 1 microsecond at 2GHz. It was (1 << (10 - 1)).
As there are 128 latency buckets, it is not possible to show all of them on the display.
Hence the latency buckets are displayed based on on the assumption that the minimum latency is usually relatively
stable and that the maximum latency change more often.
- The first empty buckets are not shown (i.e. buckets empty for all tasks)
- If more than 15 buckets are non empty, then the buckets are combined, so that a maximum of
15 (bigger) buckets are shown
- If less than 15 buckets are non empty, the following (empty) buckets are shown
(this avoid seeing every x seconds some columns being added and removed).
Change-Id: I27fe6ac0e513a5558e42ff2e74255c55ba79516d
Signed-off-by: Xavier Simonart <xavier.simonart@intel.com>
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Xavier Simonart