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Diffstat (limited to 'fluent-bit/lib/monkey/mk_server/mk_kernel.c')
| -rw-r--r-- | fluent-bit/lib/monkey/mk_server/mk_kernel.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/fluent-bit/lib/monkey/mk_server/mk_kernel.c b/fluent-bit/lib/monkey/mk_server/mk_kernel.c new file mode 100644 index 000000000..cc69e96c5 --- /dev/null +++ b/fluent-bit/lib/monkey/mk_server/mk_kernel.c @@ -0,0 +1,165 @@ +/*-*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ + +/* Monkey HTTP Server + * ================== + * Copyright 2001-2017 Eduardo Silva <eduardo@monkey.io> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <monkey/monkey.h> +#include <monkey/mk_core.h> +#include <monkey/mk_kernel.h> +#include <monkey/mk_utils.h> +#include <monkey/mk_server.h> +#include <monkey/mk_scheduler.h> + +#include <ctype.h> + +#ifndef _WIN32 +#include <sys/utsname.h> + +int mk_kernel_version() +{ + int a, b, c; + int len; + int pos; + char *p, *t; + char *tmp; + struct utsname uts; + + if (uname(&uts) == -1) { + mk_libc_error("uname"); + } + len = strlen(uts.release); + + /* Fixme: this don't support Linux Kernel 10.x.x :P */ + a = (*uts.release - '0'); + + /* Second number */ + p = (uts.release) + 2; + pos = mk_string_char_search(p, '.', len - 2); + if (pos <= 0) { + /* Some Debian systems uses a different notation, e.g: 3.14-2-amd64 */ + pos = mk_string_char_search(p, '-', len - 2); + if (pos <= 0) { + return -1; + } + } + + tmp = mk_string_copy_substr(p, 0, pos); + if (!tmp) { + return -1; + } + b = atoi(tmp); + mk_mem_free(tmp); + + /* Last number (it needs filtering) */ + t = p = p + pos + 1; + do { + t++; + } while (isdigit(*t)); + + tmp = mk_string_copy_substr(p, 0, t - p); + if (!tmp) { + return -1; + } + c = atoi(tmp); + mk_mem_free(tmp); + + MK_TRACE("Kernel detected: %i.%i.%i", a, b, c); + return MK_KERNEL_VERSION(a, b, c); +} + +/* Detect specific Linux Kernel features that we may use */ +int mk_kernel_features(int version) +{ + int flags = 0; + + /* + * TCP Auto Corking (disabled by #175) + * ----------------------------------- + * I found that running some benchmarks on Linux 3.16 with + * tcp_autocorking enabled, it lead to lower performance, looks like + * a manual cork fits better for our needs. + * + * I think there is something wrong that we need to clarify, by now + * I've logged the following issue: + * + * https://github.com/monkey/monkey/issues/175 + * + if (mk_kernel_runver >= MK_KERNEL_VERSION(3, 14, 0) && + mk_socket_tcp_autocorking() == MK_TRUE) { + flags |= MK_KERNEL_TCP_AUTOCORKING; + } + */ + + /* SO_REUSEPORT */ + if (version >= MK_KERNEL_VERSION(3, 9, 0)) { + flags |= MK_KERNEL_SO_REUSEPORT; + } + + /* TCP_FASTOPEN */ + if (version >= MK_KERNEL_VERSION(3, 7, 0)) { + flags |= MK_KERNEL_TCP_FASTOPEN; + } + + return flags; +} + +int mk_kernel_features_print(char *buffer, size_t size, + struct mk_server *server) +{ + int offset = 0; + int features = 0; + + if (server->kernel_features & MK_KERNEL_TCP_FASTOPEN) { + offset += snprintf(buffer, size - offset, "%s", "TCP_FASTOPEN "); + features++; + } + + if (server->kernel_features & MK_KERNEL_SO_REUSEPORT) { + if (server->scheduler_mode == MK_SCHEDULER_FAIR_BALANCING) { + offset += snprintf(buffer + offset, size - offset, + "%s!%s", ANSI_BOLD ANSI_RED, ANSI_RESET); + } + offset += snprintf(buffer + offset, size - offset, "%s", "SO_REUSEPORT "); + features++; + } + + if (server->kernel_features & MK_KERNEL_TCP_AUTOCORKING) { + snprintf(buffer + offset, size - offset, "%s", "TCP_AUTOCORKING "); + features++; + } + + return features; +} +#else +/* We still need to determine if this can be safely ignored or what do we need to do here */ + +int mk_kernel_version() +{ + return 1; +} + +int mk_kernel_features(int version) +{ + return 0; +} + +int mk_kernel_features_print(char* buffer, size_t size, + struct mk_server* server) +{ + return 0; +} +#endif |