From patchwork Mon Feb 12 18:58:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Rogers X-Patchwork-Id: 200006 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:bc8a:b0:106:860b:bbdd with SMTP id dn10csp115938dyb; Mon, 12 Feb 2024 11:11:11 -0800 (PST) X-Google-Smtp-Source: AGHT+IHd4Oi6GeV1WROgjPC1l5riVqG4uLb9GbmAt0xYDMzw9gXGHFElK/pwk0CkCcEibIfyvc43 X-Received: by 2002:a05:6a20:9f98:b0:19c:9d37:ec59 with SMTP id mm24-20020a056a209f9800b0019c9d37ec59mr7021961pzb.28.1707765071643; Mon, 12 Feb 2024 11:11:11 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1707765071; cv=pass; d=google.com; s=arc-20160816; b=lF+ZZIsW3FgMCPEJJ7DZ58INxnTQe1ODLSs4NSIwoBcJV378UilPA8/Ym9zmctx5sQ 08y3L6Wfq040d8enzMBMgWG0O8wvy5YyeXj5uZ547jB/J2qLIjg1yxnKHaafTRVpInIh 9nTtxO9U+pfmdOold4WyRESBOoEN/6jYG+3FLfNYfx+z5u/ziul2Eqy2WLKj6Ozl97e9 govtg7g2Jj0f/pR5yqlRqeebGJ/s5X0gBqIcktnHxdwjWPO0TqToSMSBaghQctZEwhVA wpBKnwx1fYvYfd+uT1Qj0th5ayzlgtI5z0fVohi1I+kXdIvrx3D6oRc45Lnbc8/Z/Tqg 1CSg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=to:from:subject:references:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:message-id:in-reply-to:date :dkim-signature; bh=6B/9ZrYGS/GvVU4GCl+WETb7MhjnAD4f86As1bzZZ1w=; fh=+TZgfXgl5YaohXLtzJveYaEVZje0vxiwFmmO/n9Nit8=; b=gxXtrj65P6TYgcihGKm8mWDgVa/oXc/IHQk0ExYR3Pn7hyvRMxeLu9RMGYLDpkfpia 22oyP/8cwq78dXfvDB8IKv4gz7iHMPO/MVOQcq+ZHxWnHbM4sDsHXM+TfXOwOICRszzD GmoMcCMhYHNParur/92gZ5ToiTt00k0U2Pmz6VW9vYVR6PCKj/alIydYdvvL45acn5Ub rldJoG4N0doaSgDMUI4IE5tz1Y8tMs0fom0CvurpyTAWJlLT9+84TEAp5kR93l3sOX3N Ixbnf68pPIi7gTMENPSrTAJSNwi0LplZCp/oMDlB5USIGXUhwcT9KGl4JvsnqODccLJI Jy4w==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=pJhrHak2; arc=pass (i=1 spf=pass spfdomain=flex--irogers.bounces.google.com dkim=pass dkdomain=google.com dmarc=pass fromdomain=google.com); spf=pass (google.com: domain of linux-kernel+bounces-62247-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-62247-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com X-Forwarded-Encrypted: i=2; AJvYcCUanWSa6iN3nSn9oqTeRO28UDv4QqZKiLY3uSWXZQq+oN/yLbdB819oYiEk/MsyFkcRNbG5LPEk7yXeW1nH+HjqozOvXA== Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [139.178.88.99]) by mx.google.com with ESMTPS id kq16-20020a056a004b1000b006dbdc3e21f0si5328670pfb.322.2024.02.12.11.11.11 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Feb 2024 11:11:11 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-62247-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=pJhrHak2; arc=pass (i=1 spf=pass spfdomain=flex--irogers.bounces.google.com dkim=pass dkdomain=google.com dmarc=pass fromdomain=google.com); spf=pass (google.com: domain of linux-kernel+bounces-62247-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-62247-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id C08F5287716 for ; Mon, 12 Feb 2024 19:01:23 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 478DB4D5AB; Mon, 12 Feb 2024 18:59:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="pJhrHak2" Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CCBEE4CB46 for ; Mon, 12 Feb 2024 18:59:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707764369; cv=none; b=r5Al95eV2ahiwgcZpjxQl5FLrPYBqNNTIjN0YSseec1BrMQ2nFHltLJc6MFjlUvLvuvWq76zBv2eDV2p5QDjpAHAj/F1mQVUSTB3l72SlsXpNnHARmZ20FzEcg3lSJHEQREf6OYskIDA2yYFCPJbyB3rRiDn3wr2EmWIS5JHdBM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707764369; c=relaxed/simple; bh=KfhEEpMCpHHqvGdrilXEBwK902jKxXX9KSQmwky6Gvk=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Content-Type; b=b86adNCK3sVDhKKQmmzIuh9W2EjB5n266Ngv1iv765c9BFqSGx3fAuFHQxSGfMAUmsO3OCVU0FaaqVDeiR//spD8ud9Wo6ym5Ew8On3zaE+uohl0XCY5gHxMdJtyYmlScbJS9td4/QCcVvLCKpNhVcQmWxsf0MtAFpDmhBjURfw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=pJhrHak2; arc=none smtp.client-ip=209.85.219.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-dc74ebfd282so6120720276.3 for ; Mon, 12 Feb 2024 10:59:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1707764367; x=1708369167; darn=vger.kernel.org; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=6B/9ZrYGS/GvVU4GCl+WETb7MhjnAD4f86As1bzZZ1w=; b=pJhrHak2y57vA6OoI0mm/XzrgkVOszPiR2R1gjHKxwB+JXkklNrNwprDmelIfEHEN2 dv5qWYLm5y+5ESaR1Kmx7TTczqrD7BVJfEmbu4PGukb7ZDOKJnONYh+My10g5lKWHcam 5GuX9uYGZcvP5PLpRniiWGLb2nssCEzepRpftUqTE3mqmOILMeFY9Vsc53OgSZGvLWp7 +YYPtikYn2eaaWqrARdR7WgrlxnU0Pr0ntIlDS6B/zi9L7YqIPi4jo1JxKRXvkUACrzC kwRatrRhqq5jtHAeidV40SZdYjvk1p7Xa2NABKBAvA8lp/dPaTiUY2C3hfxzH+cE7fMT DICA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707764367; x=1708369167; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=6B/9ZrYGS/GvVU4GCl+WETb7MhjnAD4f86As1bzZZ1w=; b=vk5RUnbi5u31d+5Mbch0STAsTvRUqsv964qM/uhS00eyQYRlG6cQkySWzQn4X3H6PE Q3iu1L5k0u9kmYhtCzec8m1acZZLKn7UXh8dCfTnPK5XfdZe/ddIo/JbbF5bq7XmEaFi blUvmEYPR1ySTKnKIoAzhUAnmKUUc4tjEgbPgd5XCf4npiM5APgMN3EKIWq78RK3+sco nZLBaL1CpE8jUoXMsWK4r7ewwPd8wPYj6fU5m9OxAsPD98qD8jGgAmvch+3NLFPZ26RJ +WmCRSyhjhWZ7dgubIjw1QFxb9z2ZrjLrfAhe+vS5xqIZRHMni7IZMnWO36epU4kebMu xegQ== X-Gm-Message-State: AOJu0YzZ4HdAePaTqnVkLN7GxJPMcTvIbg0e5QPWFa4hVv6goPstlbZj OtADMam3HkAGXBhaGPehDcz6XdLF0YDeCQ5uMhKclWpij46Cbmoyfk45V75rZDlxh6zTyX8y7nq 0rnQBcw== X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:125c:bcda:4fe2:b6e6]) (user=irogers job=sendgmr) by 2002:a25:aa6e:0:b0:dc6:e8a7:fdba with SMTP id s101-20020a25aa6e000000b00dc6e8a7fdbamr2005453ybi.4.1707764366829; Mon, 12 Feb 2024 10:59:26 -0800 (PST) Date: Mon, 12 Feb 2024 10:58:58 -0800 In-Reply-To: <20240212185858.68189-1-irogers@google.com> Message-Id: <20240212185858.68189-9-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240212185858.68189-1-irogers@google.com> X-Mailer: git-send-email 2.43.0.687.g38aa6559b0-goog Subject: [PATCH v3 8/8] perf tests: Add option to run tests in parallel From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , James Clark , Athira Jajeev , Kan Liang , Yang Jihong , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, llvm@lists.linux.dev X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790721467533661562 X-GMAIL-MSGID: 1790721467533661562 By default tests are forked, add an option (-p or --parallel) so that the forked tests are all started in parallel and then their output gathered serially. This is opt-in as running in parallel can cause test flakes. Rather than fork within the code, the start_command/finish_command from libsubcmd are used. This changes how stderr and stdout are handled. The child stderr and stdout are always read to avoid the child blocking. If verbose is 1 (-v) then if the test fails the child stdout and stderr are displayed. If the verbose is >1 (e.g. -vv) then the stdout and stderr from the child are immediately displayed. An unscientific test on my laptop shows the wall clock time for perf test without parallel being 5 minutes 21 seconds and with parallel (-p) being 1 minute 50 seconds. Signed-off-by: Ian Rogers --- v1 of this code had a bug where stdout/stderr weren't read fully. This and additional issues/improvements are dealt with in v2. --- tools/perf/tests/builtin-test.c | 305 ++++++++++++++++++++++---------- 1 file changed, 213 insertions(+), 92 deletions(-) diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index c42cb40fc242..b815db8ebf79 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -6,6 +6,7 @@ */ #include #include +#include #include #include #include @@ -21,9 +22,11 @@ #include "debug.h" #include "color.h" #include +#include #include "string2.h" #include "symbol.h" #include "util/rlimit.h" +#include "util/strbuf.h" #include #include #include @@ -31,7 +34,13 @@ #include "tests-scripts.h" +/* + * Command line option to not fork the test running in the same process and + * making them easier to debug. + */ static bool dont_fork; +/* Fork the tests in parallel and then wait for their completion. */ +static bool parallel; const char *dso_to_test; const char *test_objdump_path = "objdump"; @@ -209,76 +218,36 @@ static bool perf_test__matches(const char *desc, int curr, int argc, const char return false; } -static int run_test(struct test_suite *test, int subtest) -{ - int status, err = -1, child = dont_fork ? 0 : fork(); - char sbuf[STRERR_BUFSIZE]; - - if (child < 0) { - pr_err("failed to fork test: %s\n", - str_error_r(errno, sbuf, sizeof(sbuf))); - return -1; - } - - if (!child) { - if (!dont_fork) { - pr_debug("test child forked, pid %d\n", getpid()); - - if (verbose <= 0) { - int nullfd = open("/dev/null", O_WRONLY); - - if (nullfd >= 0) { - close(STDERR_FILENO); - close(STDOUT_FILENO); - - dup2(nullfd, STDOUT_FILENO); - dup2(STDOUT_FILENO, STDERR_FILENO); - close(nullfd); - } - } else { - signal(SIGSEGV, sighandler_dump_stack); - signal(SIGFPE, sighandler_dump_stack); - } - } - - err = test_function(test, subtest)(test, subtest); - if (!dont_fork) - exit(err); - } - - if (!dont_fork) { - wait(&status); +struct child_test { + struct child_process process; + struct test_suite *test; + int test_num; + int subtest; +}; - if (WIFEXITED(status)) { - err = (signed char)WEXITSTATUS(status); - pr_debug("test child finished with %d\n", err); - } else if (WIFSIGNALED(status)) { - err = -1; - pr_debug("test child interrupted\n"); - } - } +static int run_test_child(struct child_process *process) +{ + struct child_test *child = container_of(process, struct child_test, process); + int err; - return err; + pr_debug("--- start ---\n"); + pr_debug("test child forked, pid %d\n", getpid()); + err = test_function(child->test, child->subtest)(child->test, child->subtest); + pr_debug("---- end(%d) ----\n", err); + fflush(NULL); + return -err; } -#define for_each_test(j, k, t) \ - for (j = 0, k = 0; j < ARRAY_SIZE(tests); j++, k = 0) \ - while ((t = tests[j][k++]) != NULL) - -static int test_and_print(struct test_suite *t, int subtest) +static int print_test_result(struct test_suite *t, int i, int subtest, int result, int width) { - int err; - - pr_debug("\n--- start ---\n"); - err = run_test(t, subtest); - pr_debug("---- end ----\n"); + if (has_subtests(t)) { + int subw = width > 2 ? width - 2 : width; - if (!has_subtests(t)) - pr_debug("%s:", t->desc); - else - pr_debug("%s subtest %d:", t->desc, subtest + 1); + pr_info("%3d.%1d: %-*s:", i + 1, subtest + 1, subw, test_description(t, subtest)); + } else + pr_info("%3d: %-*s:", i + 1, width, test_description(t, subtest)); - switch (err) { + switch (result) { case TEST_OK: pr_info(" Ok\n"); break; @@ -297,22 +266,177 @@ static int test_and_print(struct test_suite *t, int subtest) break; } - return err; + return 0; +} + +static int finish_test(struct child_test *child_test, int width) +{ + struct test_suite *t = child_test->test; + int i = child_test->test_num; + int subi = child_test->subtest; + int out = child_test->process.out; + int err = child_test->process.err; + bool out_done = out <= 0; + bool err_done = err <= 0; + struct strbuf out_output = STRBUF_INIT; + struct strbuf err_output = STRBUF_INIT; + int ret; + + /* + * For test suites with subtests, display the suite name ahead of the + * sub test names. + */ + if (has_subtests(t) && subi == 0) + pr_info("%3d: %-*s:\n", i + 1, width, test_description(t, -1)); + + /* + * Busy loop reading from the child's stdout and stderr that are set to + * be non-blocking until EOF. + */ + if (!out_done) + fcntl(out, F_SETFL, O_NONBLOCK); + if (!err_done) + fcntl(err, F_SETFL, O_NONBLOCK); + if (verbose > 1) { + if (has_subtests(t)) + pr_info("%3d.%1d: %s:\n", i + 1, subi + 1, test_description(t, subi)); + else + pr_info("%3d: %s:\n", i + 1, test_description(t, -1)); + } + while (!out_done || !err_done) { + struct pollfd pfds[2] = { + { .fd = out, + .events = POLLIN | POLLERR | POLLHUP | POLLNVAL, + }, + { .fd = err, + .events = POLLIN | POLLERR | POLLHUP | POLLNVAL, + }, + }; + char buf[512]; + ssize_t len; + + /* Poll to avoid excessive spinning, timeout set for 1000ms. */ + poll(pfds, ARRAY_SIZE(pfds), /*timeout=*/1000); + if (!out_done && pfds[0].revents) { + errno = 0; + len = read(out, buf, sizeof(buf) - 1); + + if (len <= 0) { + out_done = errno != EAGAIN; + } else { + buf[len] = '\0'; + if (verbose > 1) + fprintf(stdout, "%s", buf); + else + strbuf_addstr(&out_output, buf); + } + } + if (!err_done && pfds[1].revents) { + errno = 0; + len = read(err, buf, sizeof(buf) - 1); + + if (len <= 0) { + err_done = errno != EAGAIN; + } else { + buf[len] = '\0'; + if (verbose > 1) + fprintf(stdout, "%s", buf); + else + strbuf_addstr(&err_output, buf); + } + } + } + /* Clean up child process. */ + ret = finish_command(&child_test->process); + if (verbose == 1 && ret == TEST_FAIL) { + /* Add header for test that was skipped above. */ + if (has_subtests(t)) + pr_info("%3d.%1d: %s:\n", i + 1, subi + 1, test_description(t, subi)); + else + pr_info("%3d: %s:\n", i + 1, test_description(t, -1)); + fprintf(stdout, "%s", out_output.buf); + fprintf(stderr, "%s", err_output.buf); + } + strbuf_release(&out_output); + strbuf_release(&err_output); + print_test_result(t, i, subi, ret, width); + if (out > 0) + close(out); + if (err > 0) + close(err); + return 0; +} + +static int start_test(struct test_suite *test, int i, int subi, struct child_test **child, + int width) +{ + int err; + + *child = NULL; + if (dont_fork) { + pr_debug("--- start ---\n"); + err = test_function(test, subi)(test, subi); + pr_debug("---- end ----\n"); + print_test_result(test, i, subi, err, width); + return 0; + } + + *child = zalloc(sizeof(**child)); + if (!*child) + return -ENOMEM; + + (*child)->test = test; + (*child)->test_num = i; + (*child)->subtest = subi; + (*child)->process.pid = -1; + (*child)->process.no_stdin = 1; + if (verbose <= 0) { + (*child)->process.no_stdout = 1; + (*child)->process.no_stderr = 1; + } else { + (*child)->process.out = -1; + (*child)->process.err = -1; + } + (*child)->process.no_exec_cmd = run_test_child; + err = start_command(&(*child)->process); + if (err || parallel) + return err; + return finish_test(*child, width); } +#define for_each_test(j, k, t) \ + for (j = 0, k = 0; j < ARRAY_SIZE(tests); j++, k = 0) \ + while ((t = tests[j][k++]) != NULL) + static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist) { struct test_suite *t; unsigned int j, k; int i = 0; int width = 0; + size_t num_tests = 0; + struct child_test **child_tests; + int child_test_num = 0; for_each_test(j, k, t) { int len = strlen(test_description(t, -1)); if (width < len) width = len; + + if (has_subtests(t)) { + for (int l = 0, subn = num_subtests(t); l < subn; l++) { + len = strlen(test_description(t, -1)); + if (width < len) + width = len; + num_tests++; + } + } else + num_tests++; } + child_tests = calloc(num_tests, sizeof(*child_tests)); + if (!child_tests) + return -ENOMEM; for_each_test(j, k, t) { int curr = i++; @@ -334,52 +458,47 @@ static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist) continue; } - pr_info("%3d: %-*s:", i, width, test_description(t, -1)); - if (intlist__find(skiplist, i)) { + pr_info("%3d: %-*s:", curr + 1, width, test_description(t, -1)); color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n"); continue; } if (!has_subtests(t)) { - test_and_print(t, -1); + int err = start_test(t, curr, -1, &child_tests[child_test_num++], width); + + if (err) { + /* TODO: if parallel waitpid the already forked children. */ + free(child_tests); + return err; + } } else { int subn = num_subtests(t); - /* - * minus 2 to align with normal testcases. - * For subtest we print additional '.x' in number. - * for example: - * - * 35: Test LLVM searching and compiling : - * 35.1: Basic BPF llvm compiling test : Ok - */ - int subw = width > 2 ? width - 2 : width; - - if (subn <= 0) { - color_fprintf(stderr, PERF_COLOR_YELLOW, - " Skip (not compiled in)\n"); - continue; - } - pr_info("\n"); for (subi = 0; subi < subn; subi++) { - int len = strlen(test_description(t, subi)); + int err; - if (subw < len) - subw = len; - } - - for (subi = 0; subi < subn; subi++) { if (!perf_test__matches(test_description(t, subi), curr, argc, argv)) continue; - pr_info("%3d.%1d: %-*s:", i, subi + 1, subw, - test_description(t, subi)); - test_and_print(t, subi); + err = start_test(t, curr, subi, &child_tests[child_test_num++], + width); + if (err) + return err; } } } + for (i = 0; i < child_test_num; i++) { + if (parallel) { + int ret = finish_test(child_tests[i], width); + + if (ret) + return ret; + } + free(child_tests[i]); + } + free(child_tests); return 0; } @@ -447,6 +566,8 @@ int cmd_test(int argc, const char **argv) "be more verbose (show symbol address, etc)"), OPT_BOOLEAN('F', "dont-fork", &dont_fork, "Do not fork for testcase"), + OPT_BOOLEAN('p', "parallel", ¶llel, + "Run the tests altogether in parallel"), OPT_STRING('w', "workload", &workload, "work", "workload to run for testing"), OPT_STRING(0, "dso", &dso_to_test, "dso", "dso to test"), OPT_STRING(0, "objdump", &test_objdump_path, "path",