diff options
| author | Cliff Wickman <cpw@sgi.com> | 2012-06-22 08:13:30 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-25 14:45:04 +0200 |
| commit | 26ef85770c765bb8b6b6922f8a413872dd8e3979 (patch) | |
| tree | 3f09673f746331fd2e237661ccbf12b220d880f9 /arch/x86/include | |
| parent | 11cab711f686893f2696a061dfca30454a624784 (diff) | |
x86/uv: Implement UV BAU runtime enable and disable control via /proc/sgi_uv/
This patch enables the BAU to be turned on or off dynamically.
echo "on" > /proc/sgi_uv/ptc_statistics
echo "off" > /proc/sgi_uv/ptc_statistics
The system may be booted with or without the nobau option.
Whether the system currently has the BAU off can be seen in
the /proc file -- normally with the baustats script.
Each cpu will have a 1 in the bauoff field if the BAU was turned
off, so baustats will give a count of cpus that have it off.
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20120622131330.GB31884@sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/uv/uv_bau.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h index 6149b476d9df..847c00b721b2 100644 --- a/arch/x86/include/asm/uv/uv_bau.h +++ b/arch/x86/include/asm/uv/uv_bau.h @@ -520,6 +520,7 @@ struct ptc_stats { unsigned long s_uv2_wars; /* uv2 workaround, perm. busy */ unsigned long s_uv2_wars_hw; /* uv2 workaround, hiwater */ unsigned long s_uv2_war_waits; /* uv2 workaround, long waits */ + unsigned long s_enters; /* entries to the driver */ /* destination statistics */ unsigned long d_alltlb; /* times all tlb's on this cpu were flushed */ @@ -586,6 +587,7 @@ struct bau_control { int timeout_tries; int ipi_attempts; int conseccompletes; + short nobau; int baudisabled; int set_bau_off; short cpu; |