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| author | Noam Camus <noamca@mellanox.com> | 2017-05-28 09:52:04 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2017-08-28 15:17:36 -0700 |
| commit | ab1e8660c1bb2aa6ca3fbbc7e97cc2a5ffe1599b (patch) | |
| tree | e8a1ec354ca949fb23a6643df410f605899c0688 | |
| parent | 30b7af252e8fef6bf2fc311ca654c40bd0552220 (diff) | |
| download | linux-stable-ab1e8660c1bb2aa6ca3fbbc7e97cc2a5ffe1599b.tar.gz linux-stable-ab1e8660c1bb2aa6ca3fbbc7e97cc2a5ffe1599b.tar.bz2 linux-stable-ab1e8660c1bb2aa6ca3fbbc7e97cc2a5ffe1599b.zip | |
ARC: [plat-eznps] disabled stall counter due to a HW bug
This counter represents threshold for consecutive stall which
would trigger HW threads scheduling. However when enabled, low
threshhold values cause performance degradation and in the
worst case even livelock.
So disable it by resorting to HW reset value
Signed-off-by: Noam Camus <noamca@mellanox.com>
Reviewed-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: fixed changelog]
| -rw-r--r-- | arch/arc/plat-eznps/mtm.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arc/plat-eznps/mtm.c b/arch/arc/plat-eznps/mtm.c index aaaaffd3d940..e0cb36b03d2e 100644 --- a/arch/arc/plat-eznps/mtm.c +++ b/arch/arc/plat-eznps/mtm.c @@ -119,8 +119,6 @@ void mtm_enable_core(unsigned int cpu) mt_ctrl.value = 0; mt_ctrl.hsen = 1; mt_ctrl.hs_cnt = MT_CTRL_HS_CNT; - mt_ctrl.sten = 1; - mt_ctrl.st_cnt = MT_CTRL_ST_CNT; mt_ctrl.mten = 1; write_aux_reg(CTOP_AUX_MT_CTRL, mt_ctrl.value); |