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| author | Justin Ernst <justin.ernst@hpe.com> | 2017-07-13 13:33:23 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-16 11:05:04 +0200 |
| commit | dfc1ed1caef09e6be147f9e8d72631e788ffefd9 (patch) | |
| tree | 57b966a7eea13f961251bf642928262fec4f32c8 /arch | |
| parent | 5f8a16156aa1b2d0223eaee9dacdfb9bc096f610 (diff) | |
| download | lwn-dfc1ed1caef09e6be147f9e8d72631e788ffefd9.tar.gz lwn-dfc1ed1caef09e6be147f9e8d72631e788ffefd9.zip | |
x86/platform/uv/BAU: Fix congested_response_us not taking effect
Bug fix for the BAU tunable congested_cycles not being set to the user
defined value. Instead of referencing a global variable when deciding
on BAU shutdown, a node will reference its own tunable set
value ( cong_response_us). This results in the user set
tunable value congested_response_us taking effect correctly.
Signed-off-by: Justin Ernst <justin.ernst@hpe.com>
Acked-by: Andrew Banman <abanman@hpe.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: mike.travis@hpe.com
Cc: sivanich@hpe.com
Link: http://lkml.kernel.org/r/1499970803-282432-1-git-send-email-justin.ernst@hpe.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/platform/uv/tlb_uv.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c index d4a61ddf9e62..fd8759111b65 100644 --- a/arch/x86/platform/uv/tlb_uv.c +++ b/arch/x86/platform/uv/tlb_uv.c @@ -40,7 +40,6 @@ static int timeout_base_ns[] = { static int timeout_us; static bool nobau = true; static int nobau_perm; -static cycles_t congested_cycles; /* tunables: */ static int max_concurr = MAX_BAU_CONCURRENT; @@ -829,10 +828,10 @@ static void record_send_stats(cycles_t time1, cycles_t time2, if ((completion_status == FLUSH_COMPLETE) && (try == 1)) { bcp->period_requests++; bcp->period_time += elapsed; - if ((elapsed > congested_cycles) && + if ((elapsed > usec_2_cycles(bcp->cong_response_us)) && (bcp->period_requests > bcp->cong_reps) && ((bcp->period_time / bcp->period_requests) > - congested_cycles)) { + usec_2_cycles(bcp->cong_response_us))) { stat->s_congested++; disable_for_period(bcp, stat); } @@ -2228,7 +2227,6 @@ static int __init uv_bau_init(void) } nuvhubs = uv_num_possible_blades(); - congested_cycles = usec_2_cycles(congested_respns_us); uv_base_pnode = 0x7fffffff; for (uvhub = 0; uvhub < nuvhubs; uvhub++) { |