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Groups > linux.kernel > #1652035
| From | Noam Camus <noamca@mellanox.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 08/11] ARC: [plat-eznps] spinlock aware for MTM |
| Date | 2017-05-28 09:00 +0200 |
| Message-ID | <tM0lc-6QK-7@gated-at.bofh.it> (permalink) |
| References | <tM0lb-6QK-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Noam Camus <noamca@mellanox.com> This way when we execute "ex" during trying to hold lock we can switch to other HW thread and utilize the core intead of just spinning on a lock. We noticed about 10% improvement of execution time with hackbench test. Signed-off-by: Noam Camus <noamca@mellanox.com> --- arch/arc/include/asm/spinlock.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/arch/arc/include/asm/spinlock.h b/arch/arc/include/asm/spinlock.h index 233d5ff..0a54ce7 100644 --- a/arch/arc/include/asm/spinlock.h +++ b/arch/arc/include/asm/spinlock.h @@ -252,9 +252,15 @@ static inline void arch_spin_lock(arch_spinlock_t *lock) __asm__ __volatile__( "1: ex %0, [%1] \n" +#ifdef CONFIG_EZNPS_MTM_EXT + " .word %3 \n" +#endif " breq %0, %2, 1b \n" : "+&r" (val) : "r"(&(lock->slock)), "ir"(__ARCH_SPIN_LOCK_LOCKED__) +#ifdef CONFIG_EZNPS_MTM_EXT + , "i"(CTOP_INST_SCHD_RW) +#endif : "memory"); /* -- 1.7.1
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[PATCH v2 08/11] ARC: [plat-eznps] spinlock aware for MTM Noam Camus <noamca@mellanox.com> - 2017-05-28 09:00 +0200
Re: [PATCH v2 08/11] ARC: [plat-eznps] spinlock aware for MTM Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2017-06-02 20:40 +0200
RE: [PATCH v2 08/11] ARC: [plat-eznps] spinlock aware for MTM Noam Camus <noamca@mellanox.com> - 2017-06-04 08:20 +0200
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