Integrate TLDK with NGINX

Created a clone of nginx (from https://github.com/nginx/nginx)
to demonstrate and benchmark TLDK library integrated with real
world application.
A new nginx module is created and and BSD socket-like API is implemented
on top of native TLDK API.
Note, that right now only minimalistic subset of socket-like API is provided:
- accept
- close
- readv
- recv
- writev
so only limited nginx functionality is available for a moment.

Change-Id: Ie1efe9349a0538da4348a48fb8306cbf636b5a92
Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>
Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

1 files changed, 139 insertions, 0 deletions

diff --git a/app/nginx/src/core/ngx_cpuinfo.c b/app/nginx/src/core/ngx_cpuinfo.c
new file mode 100644
index 0000000..7205319
--- /dev/null
+++ b/app/nginx/src/core/ngx_cpuinfo.c
@@ -0,0 +1,139 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#if (( __i386__ || __amd64__ ) && ( __GNUC__ || __INTEL_COMPILER ))
+
+
+static ngx_inline void ngx_cpuid(uint32_t i, uint32_t *buf);
+
+
+#if ( __i386__ )
+
+static ngx_inline void
+ngx_cpuid(uint32_t i, uint32_t *buf)
+{
+
+    /*
+     * we could not use %ebx as output parameter if gcc builds PIC,
+     * and we could not save %ebx on stack, because %esp is used,
+     * when the -fomit-frame-pointer optimization is specified.
+     */
+
+    __asm__ (
+
+    "    mov    %%ebx, %%esi;  "
+
+    "    cpuid;                "
+    "    mov    %%eax, (%1);   "
+    "    mov    %%ebx, 4(%1);  "
+    "    mov    %%edx, 8(%1);  "
+    "    mov    %%ecx, 12(%1); "
+
+    "    mov    %%esi, %%ebx;  "
+
+    : : "a" (i), "D" (buf) : "ecx", "edx", "esi", "memory" );
+}
+
+
+#else /* __amd64__ */
+
+
+static ngx_inline void
+ngx_cpuid(uint32_t i, uint32_t *buf)
+{
+    uint32_t  eax, ebx, ecx, edx;
+
+    __asm__ (
+
+        "cpuid"
+
+    : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (i) );
+
+    buf[0] = eax;
+    buf[1] = ebx;
+    buf[2] = edx;
+    buf[3] = ecx;
+}
+
+
+#endif
+
+
+/* auto detect the L2 cache line size of modern and widespread CPUs */
+
+void
+ngx_cpuinfo(void)
+{
+    u_char    *vendor;
+    uint32_t   vbuf[5], cpu[4], model;
+
+    vbuf[0] = 0;
+    vbuf[1] = 0;
+    vbuf[2] = 0;
+    vbuf[3] = 0;
+    vbuf[4] = 0;
+
+    ngx_cpuid(0, vbuf);
+
+    vendor = (u_char *) &vbuf[1];
+
+    if (vbuf[0] == 0) {
+        return;
+    }
+
+    ngx_cpuid(1, cpu);
+
+    if (ngx_strcmp(vendor, "GenuineIntel") == 0) {
+
+        switch ((cpu[0] & 0xf00) >> 8) {
+
+        /* Pentium */
+        case 5:
+            ngx_cacheline_size = 32;
+            break;
+
+        /* Pentium Pro, II, III */
+        case 6:
+            ngx_cacheline_size = 32;
+
+            model = ((cpu[0] & 0xf0000) >> 8) | (cpu[0] & 0xf0);
+
+            if (model >= 0xd0) {
+                /* Intel Core, Core 2, Atom */
+                ngx_cacheline_size = 64;
+            }
+
+            break;
+
+        /*
+         * Pentium 4, although its cache line size is 64 bytes,
+         * it prefetches up to two cache lines during memory read
+         */
+        case 15:
+            ngx_cacheline_size = 128;
+            break;
+        }
+
+    } else if (ngx_strcmp(vendor, "AuthenticAMD") == 0) {
+        ngx_cacheline_size = 64;
+    }
+}
+
+#else
+
+
+void
+ngx_cpuinfo(void)
+{
+}
+
+
+#endif