jakedouglas

// How do I make the 'f' function parameterized by the type of the implicit?

def cas[T](key: Array[Byte],
           ttl: Int = 0)
          (f: Option[T] => Option[T])
          (implicit transcoder: Transcoder[T] = defaultTranscoder): Boolean = { ... }


// trying to compile this usage fails. would like to avoid using c.cas[SomeType](key)

jakedouglas

(0 to 7).foldLeft(BigInt(0)) { (acc, idx) =>
  idx match {
    case 7 => acc | bytes.get(idx)
    case _ => acc | bytes.get(idx) << 8
  }
}

jakedouglas

# to test, with the rackup and config files in place

$ gem install zbatery
$ zbatery -c zb_config.rb test.ru

# in another terminal
$ ab -n 300 -c 1 http://127.0.0.1:8080/

jakedouglas

listen loop error: #<Errno::EBADF: Bad file descriptor>.
kernel/common/io.rb:1701:in `close'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/process_client.rb:59:in `process_client'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/thread_pool.rb:46:in `sync_worker'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/thread_pool.rb:30:in `worker_loop'
kernel/common/thread.rb:66:in `__run__'
listen loop error: #<Errno::EBADF: Bad file descriptor>.
kernel/common/io.rb:1701:in `close'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/process_client.rb:59:in `process_client'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/thread_pool.rb:46:in `sync_worker'

jakedouglas

Error convert fd (14) to lowlevel IO: Too many open files (24)app error: #<TypeError: unable to convert fd (14) to lowlevel IO: Too many open files (24)>
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/process_client.rb:22:in `process_client'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/thread_pool.rb:46:in `sync_worker'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/thread_pool.rb:30:in `worker_loop'
kernel/common/thread.rb:66:in `__run__'
Error convert fd (14) to lowlevel IO: Too many open files (24)Error convert fd (14) to lowlevel IO: Too many open files (24)app error: #<TypeError: unable to convert fd (14) to lowlevel IO: Too many open files (24)>
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/process_client.rb:22:in `process_client'
/Users/jake/development/rnkfoods/vendorgems/rbx/1.8/gems/rainbows-1.0.0/lib/rainbows/thread_pool.rb:46:in `sync_worker'
/U

jakedouglas

(gdb) bt
#0  rubinius::TypeError::raise (type=rubinius::ModuleType, obj=0x1012630a8, reason=0x0) at vm/exception.cpp:25
#1  0x000000010016c4e8 in as<rubinius::Module> [inlined] () at /Users/jake/.rvm/src/rbx-head/vm/object_utils.hpp:94
#2  0x000000010016c4e8 in rubinius::Module::cvar_defined (this=0x11542b4b0, state=0x101004c00, name=0x1f14e) at object_utils.hpp:199
#3  0x00000001000d420e in rubinius::Primitives::static_scope_cvar_defined (state=0x101004c00, call_frame=0x7fff5fbf4ee0, msg=@0x11542eb90, args=@0x7fff5fbf4e30) at primitives_glue.gen.cpp:26010
#4  0x0000000100074c01 in rubinius::VMMethod::interpreter (state=0x101004c00, vmm=0x11542df20, call_frame=0x7fff5fbf4ee0) at instruction_implementations.hpp:548
#5  0x000000010014fa4d in rubinius::BlockEnvironment::execute_interpreter (state=0x101004c00, previous=0x7fff5fbf5728, env=0x1012d2ae0, args=@0x7fff5fbf5670, invocation=@0x7fff5fbf5080) at vm/builtin/block_environment.cpp:161
#6  0x00000001001500a3 in rubinius::BlockEnvironment::call_under (this=0x1

jakedouglas

require 'benchmark'

puts Benchmark.measure {
    a = []
    5000000.times { a << []} # use up some RAM
    3000000.times {[]}
}


-O0:

jakedouglas

diff --git a/vm/capi/gc.cpp b/vm/capi/gc.cpp
index c6231e4..71c17a0 100644
--- a/vm/capi/gc.cpp
+++ b/vm/capi/gc.cpp
@@ -55,6 +55,11 @@ extern "C" {
    * to be in the heap.
    */
   void rb_gc_mark_maybe(VALUE ptr) {
-    rb_gc_mark(ptr);
+    NativeMethodEnvironment* env = NativeMethodEnvironment::get();

jakedouglas

    bool Handle::valid_handle_p(STATE, Handle* handle) {
      Handles* handles = state->shared.global_handles();

      for(Handles::Iterator i(*handles); i.more(); i.advance()) {
        if(*i == handle) return true;
      }

      return false;
    }

jakedouglas

From 47aed113b4a3059bd98d25bd28f01402895df5ff Mon Sep 17 00:00:00 2001
From: Jake Douglas <[email protected]>
Date: Mon, 26 Jul 2010 11:11:58 -0700
Subject: [PATCH] Zero out the generator struct to avoid GC problems

---
 ext/json/ext/generator/generator.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/ext/json/ext/generator/generator.c b/ext/json/ext/generator/generator.c