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Remove obsolete block_bench test
This test is deprecated according to its author and test/blk/bench shall be used instead. Ref #1824
This commit is contained in:
Martin Stein
Christian Helmuth
parent
14c8380507
commit
96649c716d
@ -1,213 +0,0 @@
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/*
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* \brief Block driver interface test
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* \author Sebastian Sumpf
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* \date 2011-08-11
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*
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* Test block device, read blocks add one to the data, write block back, read
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* block again and compare outputs
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*/
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/*
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* Copyright (C) 2011-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/allocator_avl.h>
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#include <base/printf.h>
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#include <base/sleep.h>
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#include <block_session/connection.h>
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#include <util/string.h>
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#include <timer_session/connection.h>
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using namespace Genode;
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enum { VERBOSE = 0 };
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/*
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* Do a bench for a specific access command and request size
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*
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* \param timer timer for measurements
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* \param request_size number of bytes per request
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* \param source block session packet sink
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* \param block_size block size of the targeted device
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* \param max_lba maximum logical block address of the device
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*/
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static void run_benchmark(
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Timer::Session & timer,
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Genode::size_t request_size,
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Block::Session::Tx::Source * source,
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size_t block_size,
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unsigned max_lba,
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void * buf,
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bool write)
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{
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/*
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* request_size: how many bytes are accessed by one command
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* block_size: raw block size that is used by the drive (not the software)
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* block_count: how many raw blocks are accessed by one command
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*/
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size_t const block_count = request_size / block_size;
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/*
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* The goal is to get 5 test repetitions that took 2 s < time < 2.3 s,
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* each. Thus we start with count = 32 and then adjust the count
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* for a retry if the test time is not in range.
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*/
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unsigned tmp_bytes = 64 * request_size;;
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unsigned bytes = 0;
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unsigned ms = 0;
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unsigned reps = 0;
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float sec = 0;
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float mb_per_sec = 0;
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while (1)
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{
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size_t num_requests = tmp_bytes / request_size;
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if ((num_requests * block_count) >= max_lba) { PERR("X"); while(1); }
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/* do measurement */
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unsigned const time_before_ms = timer.elapsed_ms();
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for (unsigned i = 0; i < num_requests; i++)
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{
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/* create packet */
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addr_t const lba = i * block_count;
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Block::Packet_descriptor p(
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source->alloc_packet(request_size),
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write ? Block::Packet_descriptor::WRITE :
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Block::Packet_descriptor::READ,
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lba, block_count);
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/* simulate payload */
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void * pptr = source->packet_content(p);
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if (write) memcpy(pptr, buf, request_size);
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/* submit packet */
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source->submit_packet(p);
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p = source->get_acked_packet();
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if (!p.succeeded()) {
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PERR("could not access block %lu", lba);
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while (1) ;
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}
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/* simulate payload */
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if (!write) memcpy(buf, pptr, request_size);
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/* release packet */
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source->release_packet(p);
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}
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/* read results */
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unsigned const time_after_ms = timer.elapsed_ms();
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ms = time_after_ms - time_before_ms;
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/* trial log */
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if (VERBOSE)
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printf("%s %u bytes in %u ms\n",
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write ? "written" : "read", tmp_bytes, ms);
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/* check if test time in range */
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if (ms < 2000 || ms >= 2300) {
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/*
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* adjust transfer amount according to measured time
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*
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* FIXME implement static inertia
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*/
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tmp_bytes = (((float) 2150 / ms) * tmp_bytes);
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tmp_bytes &= 0xfffffe00; /* align to 512 byte blocks */
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} else {
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/* if new result is better than the last one do update */
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float const tmp_mb = ((float)tmp_bytes / 1000) / 1000;
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float const tmp_sec = (float)ms / 1000;
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float const tmp_mb_per_sec = (float)tmp_mb / tmp_sec;
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if (tmp_mb_per_sec > mb_per_sec) {
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sec = tmp_sec;
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mb_per_sec = tmp_mb_per_sec;
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bytes = tmp_bytes;
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}
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/* check if we need more repetitions */
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reps++;
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if (reps == 5) break;
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}
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}
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unsigned const sec_left = sec;
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unsigned const sec_right = 1000 * ((float)sec - sec_left);
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unsigned const mb_per_sec_left = mb_per_sec;
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unsigned const mb_per_sec_right = 1000 * ((float)mb_per_sec - mb_per_sec_left);
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PLOG(" %10zu %10u %u.%03u %10u.%03u", request_size, bytes, sec_left, sec_right, mb_per_sec_left, mb_per_sec_right);
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}
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void print_bench_head()
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{
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printf("\n");
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printf("bytes/block bytes sec MB/sec\n");
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printf("----------------------------------------------\n");
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}
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int main(int argc, char **argv)
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{
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using namespace Genode;
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printf("AHCI bench\n");
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printf("==========\n");
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enum { TX_BUF_SIZE = 2 * 1024 * 1024 };
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/* get block connection */
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Genode::Allocator_avl block_alloc(Genode::env()->heap());
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Block::Connection _blk_con(&block_alloc, TX_BUF_SIZE);
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Block::Session::Tx::Source * source = _blk_con.tx();
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/* check block-connection info */
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Genode::size_t _blk_size = 0;
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Block::sector_t blk_cnt = 0;
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Block::Session::Operations ops;
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_blk_con.info(&blk_cnt, &_blk_size, &ops);
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if (!ops.supported(Block::Packet_descriptor::READ)) {
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PERR("Block device not readable!");
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while(1); }
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if (!ops.supported(Block::Packet_descriptor::WRITE)) {
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PERR("Block device not writeable!");
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while(1); }
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/* data for payload simulation */
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enum { BUF_SIZE = 1 * 1024 * 1024 };
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void * buf = env()->heap()->alloc(BUF_SIZE);
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for (unsigned o = 0; o < BUF_SIZE; o += sizeof(unsigned))
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*(unsigned volatile *)((addr_t)buf + o) = 0x12345678;
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static Timer::Connection timer;
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long const request_sizes[] = {
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1048576, 262144, 16384, 8192, 4096, 2048, 1024, 512, 0 };
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/*
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* Benchmark reading from SATA device
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*/
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printf("\n");
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printf("read\n");
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printf("~~~~\n");
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print_bench_head();
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for (unsigned i = 0; request_sizes[i]; i++)
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run_benchmark(timer, request_sizes[i], source, _blk_size, blk_cnt, buf, 0);
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/*
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* Benchmark writing to SATA device
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*
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* Attention: Original data will be overridden on target drive
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*/
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printf("\n");
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printf("write\n");
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printf("~~~~~\n");
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print_bench_head();
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for (unsigned i = 0; request_sizes[i]; i++)
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run_benchmark(timer, request_sizes[i], source, _blk_size, blk_cnt, buf, 1);
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printf("\n");
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printf("benchmark finished\n");
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sleep_forever();
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return 0;
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}
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@ -1,3 +0,0 @@
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TARGET = test-block_bench
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SRC_CC = main.cc
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LIBS = base
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