#!/usr/sbin/dtrace -Zs

/*

 * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   - Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   - Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 *   - Neither the name of Oracle nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/*

*/

/*

 * Usage:

 *    1. gc_time_stat.d -c "java ..." INTERVAL_SECS

 *    2. gc_time_stat.d -p JAVA_PID INTERVAL_SECS

 *

 * This script measures the duration of a time spent in GC.  The duration is

 * measured for every memory pool every INTERVAL_SECS seconds.  If

 * INTERVAL_SECS is not set then 10 seconds interval is used.

 *

 */

#pragma D option quiet

#pragma D option destructive

#pragma D option defaultargs

#pragma D option aggrate=100ms

string TEST_NAME;

self char *str_ptr;

self string mgr_name;

self string pool_name;

int INTERVAL_SECS;

:::BEGIN

{

    SAMPLE_NAME = "hotspot GC tracing";

    START_TIME = timestamp;

    gc_total_time = 0;

    gc_total_count = 0;

    INTERVAL_SECS = $1 ? $1 : 10;

    SAMPLING_TIME = timestamp + INTERVAL_SECS * 1000000000ull;

    LINE_SEP = "--------------------------------------------------------";

    printf("BEGIN %s\n\n", SAMPLE_NAME);

}

/*

 * hotspot:::gc-begin

 *  arg0: uintptr_t,    boolean value which indicates

 *                      if this is to be a full GC or not

 */

hotspot$target:::gc-begin

{

    self->gc_ts = timestamp;

    printf("\nGC started: %Y\n", walltimestamp);

    printf("%20s | %-20s | %10s\n", "manager", "pool", "time (ms)");

    printf(" %s\n", LINE_SEP);

}

hotspot$target:::gc-end

/self->gc_ts/

{

    self->time = (timestamp - self->gc_ts) / 1000;

    printf(" %s\n", LINE_SEP);

    printf("   %40s | %10d\n", "GC total", self->time);

    gc_total_time += self->time;

    gc_total_count ++;

    self->gc_ts = 0;

}

/*

 * hotspot:::mem-pool-gc-begin, hotspot:::mem-pool-gc-end

 *  arg0: char*,        a pointer to mUTF-8 string data which contains the name

 *                          of the manager which manages this memory pool

 *  arg1: uintptr_t,    the length of the manager name (in bytes

 *  arg2: char*,        a pointer to mUTF-8 string data which contains the name

 *                          of the memory pool

 *  arg3: uintptr_t,    the length of the memory pool name (in bytes)

 *  arg4: uintptr_t,    the initial size of the memory pool (in bytes)

 *  arg5: uintptr_t,    the amount of memory in use in the memory pool

 *                          (in bytes)

 */

hotspot$target:::mem-pool-gc-begin

{

    self->str_ptr = (char*) copyin(arg0, arg1+1);

    self->str_ptr[arg1] = '\0';

    self->mgr_name = (string) self->str_ptr;

    self->str_ptr = (char*) copyin(arg2, arg3+1);

    self->str_ptr[arg3] = '\0';

    self->pool_name = (string) self->str_ptr;

    self->mem_pool_ts[self->mgr_name, self->pool_name] = timestamp;

}

hotspot$target:::mem-pool-gc-end

{

    self->str_ptr = (char*) copyin(arg0, arg1+1);

    self->str_ptr[arg1] = '\0';

    self->mgr_name = (string) self->str_ptr;

    self->str_ptr = (char*) copyin(arg2, arg3+1);

    self->str_ptr[arg3] = '\0';

    self->pool_name = (string) self->str_ptr;

    self->time =

        (timestamp - self->mem_pool_ts[self->mgr_name, self->pool_name]) / 1000;

    printf(

        "%20s | %-20s | %10d\n", self->mgr_name, self->pool_name, self->time);

    @mem_pool_total_time[self->mgr_name, self->pool_name] = sum(self->time);

    self->mem_pool_ts[self->mgr_name, self->pool_name] = 0;

    @mem_pool_count[self->mgr_name, self->pool_name] = count();

}

tick-1sec

/timestamp > SAMPLING_TIME/

{

    trace_time = (timestamp - START_TIME) / 1000;

    printf(" %s\n", LINE_SEP);

    printf("\nGC statistics, time: %Y\n\n", walltimestamp);

    printf("%20s | %-20s | %10s\n", "manager", "pool", "total time");

    printf(" %s\n", LINE_SEP);

    printa("%20s | %-20s | %10@d\n", @mem_pool_total_time);

    printf(" %s\n", LINE_SEP);

    printf("   %40s | %10d\n", "total", gc_total_time);

    printf("\n");

    printf("%20s | %-20s | %10s\n", "manager", "pool", "# of calls");

    printf(" %s\n", LINE_SEP);

    printa("%20s | %-20s | %10@d\n", @mem_pool_count);

    printf(" %s\n", LINE_SEP);

    printf("   %40s | %10d\n", "total", gc_total_count);

    SAMPLING_TIME = timestamp + INTERVAL_SECS * 1000000000ull;

}

:::END

{

    trace_time = (timestamp - START_TIME) / 1000;

    printf(" %s\n", LINE_SEP);

    printf("\nGC statistics, time: %Y\n\n", walltimestamp);

    printf("%20s | %-20s | %10s\n", "manager", "pool", "total time");

    printf(" %s\n", LINE_SEP);

    printa("%20s | %-20s | %10@d\n", @mem_pool_total_time);

    printf(" %s\n", LINE_SEP);

    printf("   %40s | %10d\n", "total", gc_total_time);

    printf("\n");

    printf("%20s | %-20s | %10s\n", "manager", "pool", "# of calls");

    printf(" %s\n", LINE_SEP);

    printa("%20s | %-20s | %10@d\n", @mem_pool_count);

    printf(" %s\n", LINE_SEP);

    printf("   %40s | %10d\n", "total", gc_total_count);

    printf("\nEND of %s\n", SAMPLE_NAME);

}

syscall::rexit:entry,

syscall::exit:entry

/pid == $target/

{

   exit(0);

}