forked from Mirror/frr
2a65f05d77
These enum's have been around since 2005 and FRR still does not have any users of these particular values. After almost 20 years, let's simplify the code slightly and remove them. Signed-off-by: Donald Sharp <sharpd@nvidia.com>
133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*/
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/* This programme shows the effects of 'heavy' long-running functions
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* on the cooperative threading model.
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*
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* Run it with a config file containing 'password whatever', telnet to it
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* (it defaults to port 4000) and enter the 'clear foo string' command.
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* then type whatever and observe that the vty interface is unresponsive
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* for quite a period of time, due to the clear_something command
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* taking a very long time to complete.
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*/
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#include <zebra.h>
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#include "frrevent.h"
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#include "vty.h"
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#include "command.h"
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#include "memory.h"
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#include "log.h"
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#include "workqueue.h"
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#include <math.h>
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#include "tests.h"
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DEFINE_MGROUP(TEST_HEAVYWQ, "heavy-wq test");
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DEFINE_MTYPE_STATIC(TEST_HEAVYWQ, WQ_NODE, "heavy_wq_node");
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DEFINE_MTYPE_STATIC(TEST_HEAVYWQ, WQ_NODE_STR, "heavy_wq_node->str");
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extern struct event_loop *master;
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static struct work_queue *heavy_wq;
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struct heavy_wq_node {
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char *str;
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int i;
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};
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enum { ITERS_FIRST = 0,
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ITERS_ERR = 100,
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ITERS_LATER = 400,
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ITERS_PRINT = 10,
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ITERS_MAX = 1000,
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};
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static void heavy_wq_add(struct vty *vty, const char *str, int i)
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{
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struct heavy_wq_node *hn;
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hn = XCALLOC(MTYPE_WQ_NODE, sizeof(struct heavy_wq_node));
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hn->i = i;
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hn->str = XSTRDUP(MTYPE_WQ_NODE_STR, str);
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work_queue_add(heavy_wq, hn);
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return;
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}
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static void slow_func_del(struct work_queue *wq, void *data)
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{
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struct heavy_wq_node *hn = data;
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assert(hn && hn->str);
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printf("%s: %s\n", __func__, hn->str);
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XFREE(MTYPE_WQ_NODE_STR, hn->str);
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XFREE(MTYPE_WQ_NODE, hn);
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}
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static wq_item_status slow_func(struct work_queue *wq, void *data)
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{
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struct heavy_wq_node *hn = data;
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double x = 1;
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int j;
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assert(hn && hn->str);
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for (j = 0; j < 300; j++)
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x += sin(x) * j;
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if ((hn->i % ITERS_PRINT) == 0)
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printf("%s did %d, x = %g\n", hn->str, hn->i, x);
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return WQ_SUCCESS;
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}
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static void clear_something(struct vty *vty, const char *str)
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{
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int i;
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/* this could be like iterating through 150k of route_table
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* or worse, iterating through a list of peers, to bgp_stop them with
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* each having 150k route tables to process...
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*/
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for (i = ITERS_FIRST; i < ITERS_MAX; i++)
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heavy_wq_add(vty, str, i);
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}
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DEFUN (clear_foo,
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clear_foo_cmd,
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"clear foo LINE...",
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"clear command\n"
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"arbitrary string\n")
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{
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char *str;
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if (!argc) {
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vty_out(vty, "%% string argument required\n");
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return CMD_WARNING;
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}
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str = argv_concat(argv, argc, 0);
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clear_something(vty, str);
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XFREE(MTYPE_TMP, str);
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return CMD_SUCCESS;
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}
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static int heavy_wq_init(void)
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{
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heavy_wq = work_queue_new(master, "heavy_work_queue");
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heavy_wq->spec.workfunc = &slow_func;
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heavy_wq->spec.del_item_data = &slow_func_del;
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heavy_wq->spec.max_retries = 3;
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heavy_wq->spec.hold = 1000;
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return 0;
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}
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void test_init(void)
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{
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install_element(VIEW_NODE, &clear_foo_cmd);
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heavy_wq_init();
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}
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