Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 13 Mar 2002 05:12:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 13 Mar 2002 05:12:31 -0500 Received: from samba.sourceforge.net ([198.186.203.85]:60945 "HELO lists.samba.org") by vger.kernel.org with SMTP id ; Wed, 13 Mar 2002 05:12:12 -0500 Date: Wed, 13 Mar 2002 19:52:17 +1100 From: Anton Blanchard To: lse-tech@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org Subject: 10.31 second kernel compile Message-ID: <20020313085217.GA11658@krispykreme> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Let the kernel compile benchmarks continue! hardware: 24 way logical partition, 1.1GHz POWER4, 60G RAM kernel: 2.5.6 + ppc64 pagetable rework kernel compiled: 2.4.18 x86 with Martin's config compiler: gcc 2.95.3 x86 cross compiler # MAKE="make -j14" /usr/bin/time make -j14 bzImage ... make[1]: Leaving directory `/home/anton/intel_kernel/linux/arch/i386/boot' 130.63user 71.31system 0:10.31elapsed 1957%CPU (0avgtext+0avgdata 0maxresident)k Due to the final link and compress stage, there is a fair amount of idle time at the end of the run. Its going to be hard to push that number lower by adding cpus. The profile results below show that kernel time is dominated by the low level ppc64 pagetable management. We are working to correct this, a lot of the overhead in __hash_page should be gone soon. The rest of the profile looks pretty good, do_anonymous_page and lru_cache_add show up high as they did in Martin's results. Thanks to Milton Miller who helped with the benchmarking, and the ppc64 team! Anton -- anton@samba.org anton@au.ibm.com 201150 total 0.0668 129051 .idled 43586 .__hash_page ppc64 specific 6714 .local_flush_tlb_range ppc64 specific 2773 .local_flush_tlb_page ppc64 specific 2203 .do_anonymous_page 2059 .lru_cache_add 1379 .__copy_tofrom_user 1220 .hpte_create_valid_pSeriesLP ppc64 LPAR specific 1039 .save_remaining_regs 871 .do_page_fault 575 .plpar_hcall ppc64 LPAR specific 554 .d_lookup 545 .rmqueue 482 .copy_page 475 .__strnlen_user 391 .__free_pages_ok 389 .zap_page_range 366 .atomic_dec_and_lock 296 .__find_get_page 287 .set_page_dirty 278 .page_cache_release 218 .handle_mm_fault 199 .__flush_dcache_icache 175 .schedule 173 .sys_brk 163 .exit_notify 156 .do_no_page 152 .lru_cache_del 147 .__wake_up 146 .copy_page_range 139 .ppc_irq_dispatch_handler 135 .find_vma 131 .__lru_cache_del 128 .fget 126 .link_path_walk 115 .do_generic_file_read 113 .pte_alloc_map 113 .filemap_nopage 109 .clear_user_page 106 .fput 104 .__alloc_pages 101 .nr_free_pages - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/