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Sat, 29 May 2021 08:22:18 -0700 (PDT) Received: from localhost.localdomain ([102.47.172.201]) by smtp.gmail.com with ESMTPSA id s7sm17019164wmh.35.2021.05.29.08.22.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 29 May 2021 08:22:18 -0700 (PDT) From: Mahmoud Mandour To: qemu-devel@nongnu.org Subject: [RFC PATCH 2/3] plugins: cache: Enabled parameterization and added trace printing Date: Sat, 29 May 2021 17:22:02 +0200 Message-Id: <20210529152203.40358-3-ma.mandourr@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210529152203.40358-1-ma.mandourr@gmail.com> References: <20210529152203.40358-1-ma.mandourr@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::42e; envelope-from=ma.mandourr@gmail.com; helo=mail-wr1-x42e.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mahmoud Mandour , =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Made both icache and dcache configurable through plugin arguments and added memory trace printing in a separate file. Signed-off-by: Mahmoud Mandour --- contrib/plugins/cache.c | 68 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 66 insertions(+), 2 deletions(-) diff --git a/contrib/plugins/cache.c b/contrib/plugins/cache.c index f8c15ebed2..7d1d185480 100644 --- a/contrib/plugins/cache.c +++ b/contrib/plugins/cache.c @@ -22,7 +22,7 @@ static GRand *rng; static GHashTable *dmiss_ht; static GHashTable *imiss_ht; -static GMutex dmtx, imtx; +static GMutex dmtx, imtx, fmtx; static int limit; static bool sys; @@ -33,6 +33,8 @@ static uint64_t dmisses; static uint64_t imem_accesses; static uint64_t imisses; +FILE *tracefile; + static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW; enum AccessResult { @@ -205,6 +207,16 @@ static void vcpu_mem_access(unsigned int cpu_index, qemu_plugin_meminfo_t info, insn_addr = ((struct InsnData *) userdata)->addr; effective_addr = hwaddr ? qemu_plugin_hwaddr_phys_addr(hwaddr) : vaddr; + if (tracefile) { + g_mutex_lock(&fmtx); + g_autoptr(GString) rep = g_string_new(""); + bool is_store = qemu_plugin_mem_is_store(info); + g_string_append_printf(rep, "%c: 0x%" PRIx64, + is_store ? 'S' : 'L', effective_addr); + fprintf(tracefile, "%s\n", rep->str); + g_mutex_unlock(&fmtx); + } + if (access_cache(dcache, effective_addr) == MISS) { struct InsnData *insn = get_or_create(dmiss_ht, userdata, insn_addr); insn->misses++; @@ -221,11 +233,20 @@ static void vcpu_insn_exec(unsigned int vcpu_index, void *userdata) g_mutex_lock(&imtx); addr = ((struct InsnData *) userdata)->addr; + if (tracefile) { + g_mutex_lock(&fmtx); + g_autoptr(GString) rep = g_string_new(""); + g_string_append_printf(rep, "I: 0x%" PRIx64, addr); + fprintf(tracefile, "%s\n", rep->str); + g_mutex_unlock(&fmtx); + } + if (access_cache(icache, addr) == MISS) { struct InsnData *insn = get_or_create(imiss_ht, userdata, addr); insn->misses++; imisses++; } + imem_accesses++; g_mutex_unlock(&imtx); } @@ -352,6 +373,15 @@ static void plugin_exit() g_mutex_unlock(&dmtx); g_mutex_unlock(&imtx); + + if (tracefile) { + fclose(tracefile); + } +} + +static bool bad_cache_params(int blksize, int assoc, int cachesize) +{ + return (cachesize % blksize) != 0 || (cachesize % (blksize * assoc) != 0); } QEMU_PLUGIN_EXPORT @@ -377,14 +407,48 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info, for (i = 0; i < argc; i++) { char *opt = argv[i]; - if (g_str_has_prefix(opt, "limit=")) { + if (g_str_has_prefix(opt, "I=")) { + gchar **toks = g_strsplit(opt + 2, " ", -1); + if (g_strv_length(toks) != 3) { + fprintf(stderr, "option parsing failed: %s\n", opt); + return -1; + } + icachesize = g_ascii_strtoull(toks[0], NULL, 10); + iassoc = g_ascii_strtoull(toks[1], NULL, 10); + iblksize = g_ascii_strtoull(toks[2], NULL, 10); + } else if (g_str_has_prefix(opt, "D=")) { + gchar **toks = g_strsplit(opt + 2, " ", -1); + if (g_strv_length(toks) != 3) { + fprintf(stderr, "option parsing failed: %s\n", opt); + return -1; + } + dcachesize = g_ascii_strtoull(toks[0], NULL, 10); + dassoc = g_ascii_strtoull(toks[1], NULL, 10); + dblksize = g_ascii_strtoull(toks[2], NULL, 10); + } else if (g_str_has_prefix(opt, "limit=")) { limit = g_ascii_strtoull(opt + 6, NULL, 10); + } else if (g_str_has_prefix(opt, "tracefile=")) { + char *file_name = opt + 10; + tracefile = fopen(file_name, "w"); + if (!tracefile) { + fprintf(stderr, "could not open: %s for writing\n", file_name); + } } else { fprintf(stderr, "option parsing failed: %s\n", opt); return -1; } } + if (bad_cache_params(iblksize, iassoc, icachesize)) { + fprintf(stderr, "icache cannot be constructed from given parameters\n"); + return -1; + } + + if (bad_cache_params(dblksize, dassoc, dcachesize)) { + fprintf(stderr, "dcache cannot be constructed from given parameters\n"); + return -1; + } + dcache = cache_init(dblksize, dassoc, dcachesize); icache = cache_init(iblksize, iassoc, icachesize); -- 2.25.1