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c08ed2db65
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Author SHA1 Message Date
Pawel Dziepak
c08ed2db65 scheduler: Try to keep thread on the same logical CPU 
Some SMT implementations (e.g. recent AMD microarchitectures) have
separate L1d cache for each SMT thread (which AMD decides to call "cores").
This means that we shouldn't move threads to another logical processor too
often even if it belongs to the same core. We aren't very strict about
this as it would complicate load balancing, but we try to reduce unnecessary
migrations.
 2013-12-20 03:36:01 +01:00
Pawel Dziepak
ad6b9a1df8 scheduler: Use sequential locks instead of atomic 64 bit access 2013-12-20 02:18:44 +01:00
Pawel Dziepak
b258298c70 kernel: Protect cpu_ent::active_time with sequential lock 
atomic_{get, set}64() are problematic on architectures without 64 bit
compare and swap.
Also, using sequential lock instead of atomic access ensures that
any reads from cpu_ent::active_time won't require any writes to shared
memory.
 2013-12-20 01:31:32 +01:00
Pawel Dziepak
6639514437 x86[_64]: Support assigning MSI IRQs to arbitrary CPU 2013-12-20 01:07:08 +01:00
Pawel Dziepak
caf1b0dffb intel_cstates: Computing C-state requires constant time step 2013-12-19 20:47:22 +01:00
Pawel Dziepak
3add52e8ba kernel: Fix topology node count being decreased twice per node 2013-12-19 20:24:34 +01:00
Pawel Dziepak
e3d001ff02 x86: Implement multicast ICIs 2013-12-19 19:35:44 +01:00
Pawel Dziepak
5a7289d720 scheduler: Fix unassigning threads from core being disabled 2013-12-18 00:03:56 +01:00
Pawel Dziepak
1b06228f13 kernel: Propagate scheduler modes to cpu{freq, idle} modules 2013-12-17 23:26:37 +01:00
Pawel Dziepak
4fcbac58de kernel: Make get_cpu_topology() return a pointer to const 
The client code is not supposed to change the topology info.
It would be also nice if cpu_topology_node::children was an array of
pointers to const but that would require several const_casts in the
topology tree generation code so it's probably not worth it.
 2013-12-17 22:08:18 +01:00
Pawel Dziepak
735f67481f x86: Debugger can now use dr3 2013-12-17 04:31:29 +01:00
Pawel Dziepak
a5b070f1fa x86: Store pointer to the current thread in gs:0 
Apparently, reading from dr3 is slower than reading from memory
with cache hit.

Also, depending on hypervisor configuration, accessing dr3 may cause
a VM exit (and, at least on kvm, it does), what makes it much slower
than a memory access even when there is a cache miss.
 2013-12-17 04:08:51 +01:00
Pawel Dziepak
611376fef7 x86: Let each CPU have its own GDT 2013-12-17 03:57:20 +01:00
Pawel Dziepak
7b9668170c kernel, boot: Increase CPU limit to 64 2013-12-16 05:00:02 +01:00
Pawel Dziepak
d02aaee17e kernel, libroot: Add more memory info in system_info 
system_info now contains all information previously available only
through __get_system_info_etc(B_MEMORY_INFO, ...).
 2013-12-16 04:53:46 +01:00
Pawel Dziepak
1bc7045fdf kernel, libroot: Introduce new API for obtaining system info 2013-12-16 03:58:43 +01:00
Pawel Dziepak
b2504f3b56 drivers/graphics: Remove log_{coll, dump} 
log_coll.c and log_dump.{c, h} don't appear to be used by anything.
 2013-12-13 02:44:29 +01:00
Pawel Dziepak
e397276460 apps/BSnow: Do not use cpu_clock_speed 2013-12-13 02:38:35 +01:00
Pawel Dziepak
25feff2c29 ProcessController: Explicitly check thread priority 2013-12-12 21:46:48 +01:00
Pawel Dziepak
8cf2f36c37 libroot: Fix Hoard when the CPU count is not a power of two 2013-12-12 21:14:25 +01:00
Pawel Dziepak
82727571c3 libroot: Fix uninitialized counter in mutex_lock() 2013-12-12 04:00:56 +01:00
Pawel Dziepak
53aac05ee5 libroot: Add prototypes for __{get,set}_scheduler_mode 2013-12-12 03:56:33 +01:00
Pawel Dziepak
39f6ced055 bin/top: Remove busy_wait_time 2013-12-12 03:18:47 +01:00
Pawel Dziepak
4c125ccacd kits/media: CPU clock speed may vary significantly 2013-12-12 03:00:18 +01:00
Pawel Dziepak
fa15750925 kernel/cpu: Do not use get_system_info() to identify CPU 2013-12-12 02:53:18 +01:00
Pawel Dziepak
02749e2429 x86/paging: Do not use array placement new 
Array placement new has implementation defined memory overhead what
makes it pretty useless.
 2013-12-11 01:59:31 +01:00
Pawel Dziepak
bcfdf88186 apps, kernel: Remove B_MAX_CPU_COUNT 2013-12-06 21:57:58 +01:00
Pawel Dziepak
fd96cf08a7 libroot: Remove _SC_NPROCESSORS_MAX and _SC_CPUID_MAX 
_SC_NPROCESSORS_MAX and _SC_CPUID_MAX appear to be supported only by
Solaris. There isn't much point in exposing such values to the userland
anyway.
 2013-12-06 21:54:07 +01:00
Pawel Dziepak
f6b71d5518 libroot/malloc: Do not use B_MAX_CPU_COUNT 2013-12-06 21:05:05 +01:00
Pawel Dziepak
3106f832a9 kernel/smp: Fix warning 2013-12-06 19:57:04 +01:00
Pawel Dziepak
e6ea745e81 kernel: Use SMP_MAX_CPUS instead of B_MAX_CPU_COUNT 2013-12-06 19:53:56 +01:00
Pawel Dziepak
3e0e3be760 boot, kernel: Replace MAX_BOOT_CPUS with SMP_MAX_CPUS 2013-12-06 19:43:08 +01:00
Pawel Dziepak
f0fe981769 kernel: Fix gcc2 build 2013-12-06 03:31:20 +01:00
Pawel Dziepak
2b04d8ab31 x86/paging: Use CPUSet instead of cpu_mask_t 2013-12-06 03:27:48 +01:00
Pawel Dziepak
e052b3e630 x86/paging: Remove unusued local variable 2013-12-06 03:11:42 +01:00
Pawel Dziepak
5c7f09c4d7 kernel/util: Bitmap: Silence warning 2013-12-06 03:10:50 +01:00
Pawel Dziepak
7629d527c5 kernel: Use CPUSet in ICI code instead of cpu_mask_t 2013-12-06 03:08:39 +01:00
Pawel Dziepak
5f3798921f x86/paging: Use ROUNUP() to compute the number of initial slots 2013-12-05 23:33:03 +01:00
Pawel Dziepak
730882d615 kernel: Remove RunQueueLink.h 2013-12-05 23:28:42 +01:00
Pawel Dziepak
52b442a687 kernel: smp_cpu_rendezvous(): Use counter instead of bitmap 2013-12-05 23:10:04 +01:00
Pawel Dziepak
d287274dce scheduler: Code refactoring 2013-12-05 22:47:30 +01:00
Pawel Dziepak
2e3cbcfa8a x86: Allocate as much initial physical page pools as needed 2013-12-02 03:19:25 +01:00
Pawel Dziepak
255b601750 scheduler: Do not send reschedule ICI when not needed 2013-11-29 21:40:25 +01:00
Pawel Dziepak
2b7ea4cddf kernel: Remove Thread::next_state 2013-11-29 19:31:10 +01:00
Pawel Dziepak
c19f1e4fbb scheduler: Add missing check for real time threads 2013-11-29 18:09:56 +01:00
Pawel Dziepak
673f08a995 kernel: Make thread_block_locked() private 2013-11-29 05:30:50 +01:00
Pawel Dziepak
0721899709 scheduler: Allow mode to specify time slice length 2013-11-29 05:11:44 +01:00
Pawel Dziepak
7f8cf14b71 scheduler, kernel/util: Fix style issues 2013-11-29 04:51:38 +01:00
Pawel Dziepak
1987bf19b5 scheduler: Update CPU disabling code to match recent changes 2013-11-29 04:35:50 +01:00
Pawel Dziepak
1ee1d0cbab kernel, drivers: Fix gcc2 build 2013-11-29 03:47:38 +01:00