Displaying 3 results from an estimated 3 matches for "1459854".
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1059854
2014 Mar 19
0
[PATCH v7 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
...--
PV ticketlock (baseline) 2409639 - 1289398 -
qspinlock 2425876 +0.7% 1291248 +0.1%
PV qspinlock 2425876 +0.7% 1299639 +0.8%
unfair qspinlock 2435724 +1.1% 1441153 +11.8%
unfair + PV qspinlock 2479339 +2.9% 1459854 +13.2%
The XFS test had moderate spinlock contention of 1.6% whereas the
ext4 test had heavy spinlock contention of 15.4% as reported by perf.
A more interesting performance comparison is when there is
overcommit. With both PV guests (all 20 CPUs equally shared with
both guests - 200% overcommit)...
2014 Mar 19
15
[PATCH v7 00/11] qspinlock: a 4-byte queue spinlock with PV support
v6->v7:
- Remove an atomic operation from the 2-task contending code
- Shorten the names of some macros
- Make the queue waiter to attempt to steal lock when unfair lock is
enabled.
- Remove lock holder kick from the PV code and fix a race condition
- Run the unfair lock & PV code on overcommitted KVM guests to collect
performance data.
v5->v6:
- Change the optimized
2014 Mar 19
15
[PATCH v7 00/11] qspinlock: a 4-byte queue spinlock with PV support
v6->v7:
- Remove an atomic operation from the 2-task contending code
- Shorten the names of some macros
- Make the queue waiter to attempt to steal lock when unfair lock is
enabled.
- Remove lock holder kick from the PV code and fix a race condition
- Run the unfair lock & PV code on overcommitted KVM guests to collect
performance data.
v5->v6:
- Change the optimized