lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 4 Oct 2021 22:40:58 -0700 From: Yury Norov <yury.norov@...il.com> To: Stephen Rothwell <sfr@...b.auug.org.au> Cc: Yury Norov <yury.norov@...il.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, linux-arch@...r.kernel.org, linux-kselftest@...r.kernel.org, linux-mmc@...r.kernel.org, linux-perf-users@...r.kernel.org, kvm@...r.kernel.org, "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, Alexander Lobakin <alobakin@...me>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Alexey Klimov <aklimov@...hat.com>, Andrea Merello <andrea.merello@...il.com>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Arnaldo Carvalho de Melo <acme@...hat.com>, Arnd Bergmann <arnd@...db.de>, Ben Gardon <bgardon@...gle.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Brian Cain <bcain@...eaurora.org>, Catalin Marinas <catalin.marinas@....com>, Christoph Lameter <cl@...ux.com>, Daniel Bristot de Oliveira <bristot@...hat.com>, David Hildenbrand <david@...hat.com>, Dennis Zhou <dennis@...nel.org>, Geert Uytterhoeven <geert@...ux-m68k.org>, Heiko Carstens <hca@...ux.ibm.com>, Ian Rogers <irogers@...gle.com>, Ingo Molnar <mingo@...hat.com>, Jaegeuk Kim <jaegeuk@...nel.org>, Jakub Kicinski <kuba@...nel.org>, Jiri Olsa <jolsa@...hat.com>, Joe Perches <joe@...ches.com>, Jonas Bonn <jonas@...thpole.se>, Leo Yan <leo.yan@...aro.org>, Mark Rutland <mark.rutland@....com>, Namhyung Kim <namhyung@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Petr Mladek <pmladek@...e.com>, Rasmus Villemoes <linux@...musvillemoes.dk>, Rich Felker <dalias@...c.org>, Samuel Mendoza-Jonas <sam@...dozajonas.com>, Sean Christopherson <seanjc@...gle.com>, Sergey Senozhatsky <senozhatsky@...omium.org>, Shuah Khan <shuah@...nel.org>, Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>, Steven Rostedt <rostedt@...dmis.org>, Tejun Heo <tj@...nel.org>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Ulf Hansson <ulf.hansson@...aro.org>, Will Deacon <will@...nel.org>, Wolfram Sang <wsa+renesas@...g-engineering.com>, Yoshinori Sato <ysato@...rs.sourceforge.jp> Subject: [PATCH 15/16] lib: bitmap: add performance test for bitmap_print_to_pagebuf Functional tests for bitmap_print_to_pagebuf() are provided in lib/test_printf.c. This patch adds performance test for a case of fully set bitmap. Signed-off-by: Yury Norov <yury.norov@...il.com> Tested-by: Wolfram Sang <wsa+renesas@...g-engineering.com> --- lib/test_bitmap.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c index d33fa5a61b95..0c82f07f74fc 100644 --- a/lib/test_bitmap.c +++ b/lib/test_bitmap.c @@ -446,6 +446,42 @@ static void __init test_bitmap_parselist(void) } } +static void __init test_bitmap_printlist(void) +{ + unsigned long *bmap = kmalloc(PAGE_SIZE, GFP_KERNEL); + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + char expected[256]; + int ret, slen; + ktime_t time; + + if (!buf || !bmap) + goto out; + + memset(bmap, -1, PAGE_SIZE); + slen = snprintf(expected, 256, "0-%ld", PAGE_SIZE * 8 - 1); + if (slen < 0) + goto out; + + time = ktime_get(); + ret = bitmap_print_to_pagebuf(true, buf, bmap, PAGE_SIZE * 8); + time = ktime_get() - time; + + if (ret != slen + 1) { + pr_err("bitmap_print_to_pagebuf: result is %d, expected %d\n", ret, slen); + goto out; + } + + if (strncmp(buf, expected, slen)) { + pr_err("bitmap_print_to_pagebuf: result is %s, expected %s\n", buf, expected); + goto out; + } + + pr_err("bitmap_print_to_pagebuf: input is '%s', Time: %llu\n", buf, time); +out: + kfree(buf); + kfree(bmap); +} + static const unsigned long parse_test[] __initconst = { BITMAP_FROM_U64(0), BITMAP_FROM_U64(1), @@ -818,6 +854,7 @@ static void __init selftest(void) test_bitmap_arr32(); test_bitmap_parse(); test_bitmap_parselist(); + test_bitmap_printlist(); test_mem_optimisations(); test_for_each_set_clump8(); test_bitmap_cut(); -- 2.30.2
Powered by blists - more mailing lists