From 5d9a7ba0dc9c24ed4e4efa9cac0e796fd524b308 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Fri, 30 May 2014 19:00:03 -0700
Subject: Avoid a system call in 'gettid'.

System calls can be pretty slow. This is mako, which has one of our
lowest latencies:

                       iterations      ns/op
  BM_unistd_getpid       10000000        209
  BM_unistd_gettid      200000000          8

Bug: 15297299 (kernel panic from too many gettid calls)
Bug: 15315766 (excessive gettid overhead in liblogd)
Change-Id: I49656c0fc5b5d092390264a59e4f2c0d8a8b1aeb
---
 libc/arch-x86/syscalls/gettid.S | 17 -----------------
 1 file changed, 17 deletions(-)
 delete mode 100644 libc/arch-x86/syscalls/gettid.S

(limited to 'libc/arch-x86/syscalls')

diff --git a/libc/arch-x86/syscalls/gettid.S b/libc/arch-x86/syscalls/gettid.S
deleted file mode 100644
index 1f264b1..0000000
--- a/libc/arch-x86/syscalls/gettid.S
+++ /dev/null
@@ -1,17 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <private/bionic_asm.h>
-
-ENTRY(gettid)
-    movl    $__NR_gettid, %eax
-    int     $0x80
-    cmpl    $-MAX_ERRNO, %eax
-    jb      1f
-    negl    %eax
-    pushl   %eax
-    call    __set_errno
-    addl    $4, %esp
-    orl     $-1, %eax
-1:
-    ret
-END(gettid)
-- 
cgit v1.1