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| author | Tal Gilboa <talgi@mellanox.com> | 2018-03-30 16:56:47 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <helgaas@kernel.org> | 2018-04-03 16:58:30 +0300 |
| commit | 9e506a7b51474241f0c900e53e85512780275c05 (patch) | |
| tree | 95063571274cdd55ff08841a6dcbbdc5c20bc045 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 6db79a88c67e4679d9c1e4a3f05c6385e21f6e9a (diff) | |
| download | linux-9e506a7b51474241f0c900e53e85512780275c05.tar.xz | |
PCI: Add pcie_print_link_status() to log link speed and whether it's limited
Add pcie_print_link_status(). This logs the current settings of the link
(speed, width, and total available bandwidth).
If the device is capable of more bandwidth but is limited by a slower
upstream link, we include information about the link that limits the
device's performance.
The user may be able to move the device to a different slot for better
performance.
This provides a unified method for all PCI devices to report status and
issues, instead of each device reporting in a different way, using
different code.
Signed-off-by: Tal Gilboa <talgi@mellanox.com>
[bhelgaas: changelog, reword log messages, print device capabilities when
not limited, print bandwidth in Gb/s]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions