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-mips/syscalls/gettid.S | 19 -------------------
 1 file changed, 19 deletions(-)
 delete mode 100644 libc/arch-mips/syscalls/gettid.S

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

diff --git a/libc/arch-mips/syscalls/gettid.S b/libc/arch-mips/syscalls/gettid.S
deleted file mode 100644
index cfdc57b..0000000
--- a/libc/arch-mips/syscalls/gettid.S
+++ /dev/null
@@ -1,19 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <private/bionic_asm.h>
-
-ENTRY(gettid)
-    .set noreorder
-    .cpload t9
-    li v0, __NR_gettid
-    syscall
-    bnez a3, 1f
-    move a0, v0
-    j ra
-    nop
-1:
-    la t9,__set_errno
-    j t9
-    nop
-    .set reorder
-END(gettid)
-- 
cgit v1.1