search for: wake_up_new_task

...dle_pte_fault |--1.58%-- do_anonymous_page |--1.56%-- rmqueue_bulk.clone.0 |--1.35%-- copy_pte_range |--1.25%-- zap_pte_range |--1.13%-- cache_flusharray |--0.88%-- __pmd_alloc |--0.70%-- wake_up_new_task |--0.66%-- __pud_alloc |--0.59%-- ext4_discard_preallocations --6.53%-- [...] With the qspinlock patch, the perf profile at 1000 users was: 3.25% reaim [kernel.kallsyms] [k] queue_spin_lock_slowpath |--62.00%-- _raw_spin_lo...

...dle_pte_fault |--1.58%-- do_anonymous_page |--1.56%-- rmqueue_bulk.clone.0 |--1.35%-- copy_pte_range |--1.25%-- zap_pte_range |--1.13%-- cache_flusharray |--0.88%-- __pmd_alloc |--0.70%-- wake_up_new_task |--0.66%-- __pud_alloc |--0.59%-- ext4_discard_preallocations --6.53%-- [...] With the qspinlock patch, the perf profile at 1000 users was: 3.25% reaim [kernel.kallsyms] [k] queue_spin_lock_slowpath |--62.00%-- _raw_spin_lo...

...57318.444140] 0000000000040001 0000000000004eae ffff880000000000 0000000000000000 [257318.444237] Call Trace: [257318.444274] [<ffffffff81015f54>] ? save_i387_xstate+0x118/0x1e2 [257318.444321] [<ffffffff8100e132>] ? do_signal+0x21f/0x635 [257318.444365] [<ffffffff810462d5>] ? wake_up_new_task+0x96/0xc2 [257318.444410] [<ffffffff8100e56d>] ? do_notify_resume+0x25/0x67 [257318.444455] [<ffffffff811070c0>] ? sys_read+0x45/0x6e [257318.444499] [<ffffffff8136d920>] ? int_signal+0x12/0x17 [257318.444541] Code: c1 ea 20 0f 01 d1 c3 48 8b 97 58 04 00 00 48 85 d2 0f 84 d0 00...

Hi Waiman, As promised; here is the paravirt stuff I did during the trip to BOS last week. All the !paravirt patches are more or less the same as before (the only real change is the copyright lines in the first patch). The paravirt stuff is 'simple' and KVM only -- the Xen code was a little more convoluted and I've no real way to test that but it should be stright fwd to make work.

Hi Waiman, As promised; here is the paravirt stuff I did during the trip to BOS last week. All the !paravirt patches are more or less the same as before (the only real change is the copyright lines in the first patch). The paravirt stuff is 'simple' and KVM only -- the Xen code was a little more convoluted and I've no real way to test that but it should be stright fwd to make work.

Hi, I''ve been working on getting a working blktap driver allowing to access ceph RBD block devices without relying on the RBD kernel driver and it finally got to a point where, it works and is testable. Some of the advantages are: - Easier to update to newer RBD version - Allows functionality only available in the userspace RBD library (write cache, layering, ...) - Less issue when

...%-- handle_pte_fault |--1.58%-- do_anonymous_page |--1.56%-- rmqueue_bulk.clone.0 |--1.35%-- copy_pte_range |--1.25%-- zap_pte_range |--1.13%-- cache_flusharray |--0.88%-- __pmd_alloc |--0.70%-- wake_up_new_task |--0.66%-- __pud_alloc |--0.59%-- ext4_discard_preallocations --6.53%-- [...] With the qspinlock patch, the perf profile at 1000 users was: 3.25% reaim [kernel.kallsyms] [k] queue_spin_lock_slowpath |--62.00%-- _raw_spin_lock_ir...

...%-- handle_pte_fault |--1.58%-- do_anonymous_page |--1.56%-- rmqueue_bulk.clone.0 |--1.35%-- copy_pte_range |--1.25%-- zap_pte_range |--1.13%-- cache_flusharray |--0.88%-- __pmd_alloc |--0.70%-- wake_up_new_task |--0.66%-- __pud_alloc |--0.59%-- ext4_discard_preallocations --6.53%-- [...] With the qspinlock patch, the perf profile at 1000 users was: 3.25% reaim [kernel.kallsyms] [k] queue_spin_lock_slowpath |--62.00%-- _raw_spin_lock_ir...

...%-- handle_pte_fault |--1.58%-- do_anonymous_page |--1.56%-- rmqueue_bulk.clone.0 |--1.35%-- copy_pte_range |--1.25%-- zap_pte_range |--1.13%-- cache_flusharray |--0.88%-- __pmd_alloc |--0.70%-- wake_up_new_task |--0.66%-- __pud_alloc |--0.59%-- ext4_discard_preallocations --6.53%-- [...] With the qspinlock patch, the perf profile at 1000 users was: 3.25% reaim [kernel.kallsyms] [k] queue_spin_lock_slowpath |--62.00%-- _raw_spin_lock_ir...

...%-- handle_pte_fault |--1.58%-- do_anonymous_page |--1.56%-- rmqueue_bulk.clone.0 |--1.35%-- copy_pte_range |--1.25%-- zap_pte_range |--1.13%-- cache_flusharray |--0.88%-- __pmd_alloc |--0.70%-- wake_up_new_task |--0.66%-- __pud_alloc |--0.59%-- ext4_discard_preallocations --6.53%-- [...] With the qspinlock patch, the perf profile at 1000 users was: 3.25% reaim [kernel.kallsyms] [k] queue_spin_lock_slowpath |--62.00%-- _raw_spin_lock_ir...