diff options
-rw-r--r-- | Documentation/x86/resctrl_ui.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/x86/resctrl_ui.rst b/Documentation/x86/resctrl_ui.rst index 866b66aa289b..5368cedfb530 100644 --- a/Documentation/x86/resctrl_ui.rst +++ b/Documentation/x86/resctrl_ui.rst | |||
@@ -40,7 +40,7 @@ mount options are: | |||
40 | Enable the MBA Software Controller(mba_sc) to specify MBA | 40 | Enable the MBA Software Controller(mba_sc) to specify MBA |
41 | bandwidth in MBps | 41 | bandwidth in MBps |
42 | 42 | ||
43 | L2 and L3 CDP are controlled seperately. | 43 | L2 and L3 CDP are controlled separately. |
44 | 44 | ||
45 | RDT features are orthogonal. A particular system may support only | 45 | RDT features are orthogonal. A particular system may support only |
46 | monitoring, only control, or both monitoring and control. Cache | 46 | monitoring, only control, or both monitoring and control. Cache |
@@ -118,7 +118,7 @@ related to allocation: | |||
118 | Corresponding region is pseudo-locked. No | 118 | Corresponding region is pseudo-locked. No |
119 | sharing allowed. | 119 | sharing allowed. |
120 | 120 | ||
121 | Memory bandwitdh(MB) subdirectory contains the following files | 121 | Memory bandwidth(MB) subdirectory contains the following files |
122 | with respect to allocation: | 122 | with respect to allocation: |
123 | 123 | ||
124 | "min_bandwidth": | 124 | "min_bandwidth": |
@@ -209,7 +209,7 @@ All groups contain the following files: | |||
209 | CPUs to/from this group. As with the tasks file a hierarchy is | 209 | CPUs to/from this group. As with the tasks file a hierarchy is |
210 | maintained where MON groups may only include CPUs owned by the | 210 | maintained where MON groups may only include CPUs owned by the |
211 | parent CTRL_MON group. | 211 | parent CTRL_MON group. |
212 | When the resouce group is in pseudo-locked mode this file will | 212 | When the resource group is in pseudo-locked mode this file will |
213 | only be readable, reflecting the CPUs associated with the | 213 | only be readable, reflecting the CPUs associated with the |
214 | pseudo-locked region. | 214 | pseudo-locked region. |
215 | 215 | ||
@@ -380,7 +380,7 @@ where L2 external is 10GBps (hence aggregate L2 external bandwidth is | |||
380 | 240GBps) and L3 external bandwidth is 100GBps. Now a workload with '20 | 380 | 240GBps) and L3 external bandwidth is 100GBps. Now a workload with '20 |
381 | threads, having 50% bandwidth, each consuming 5GBps' consumes the max L3 | 381 | threads, having 50% bandwidth, each consuming 5GBps' consumes the max L3 |
382 | bandwidth of 100GBps although the percentage value specified is only 50% | 382 | bandwidth of 100GBps although the percentage value specified is only 50% |
383 | << 100%. Hence increasing the bandwidth percentage will not yeild any | 383 | << 100%. Hence increasing the bandwidth percentage will not yield any |
384 | more bandwidth. This is because although the L2 external bandwidth still | 384 | more bandwidth. This is because although the L2 external bandwidth still |
385 | has capacity, the L3 external bandwidth is fully used. Also note that | 385 | has capacity, the L3 external bandwidth is fully used. Also note that |
386 | this would be dependent on number of cores the benchmark is run on. | 386 | this would be dependent on number of cores the benchmark is run on. |
@@ -398,7 +398,7 @@ In order to mitigate this and make the interface more user friendly, | |||
398 | resctrl added support for specifying the bandwidth in MBps as well. The | 398 | resctrl added support for specifying the bandwidth in MBps as well. The |
399 | kernel underneath would use a software feedback mechanism or a "Software | 399 | kernel underneath would use a software feedback mechanism or a "Software |
400 | Controller(mba_sc)" which reads the actual bandwidth using MBM counters | 400 | Controller(mba_sc)" which reads the actual bandwidth using MBM counters |
401 | and adjust the memowy bandwidth percentages to ensure:: | 401 | and adjust the memory bandwidth percentages to ensure:: |
402 | 402 | ||
403 | "actual bandwidth < user specified bandwidth". | 403 | "actual bandwidth < user specified bandwidth". |
404 | 404 | ||